Статті в журналах з теми "Drilling and blasting"
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1
Brahimaj, Frashër, Izet Zeqiri, Risto Dambov, and Shkurte Brahimaj. "IMPACT OF DRILLING ANGLE ON BLASTING COSTS IN SURFACE WORKS." Rudarsko-geološko-naftni zbornik 37, no. 4 (2022): 71–81. http://dx.doi.org/10.17794/rgn.2022.4.6.
Повний текст джерелаАнотація:
The removal of rock masses or their use with surface exploitation requires that this work be done at the lowest possible cost. The reduction of operating costs is done by analyzing each work action, working method, and the possibility of changing them, to have an impact on reducing costs. The drilling angle is one of the most important factors during surface exploitation by blasting. By changing the drilling angle, we achieve a reduction of the total drilling length, to have a reduction of the amount of explosives and other changes during the blasting process which do not greatly affect the cost of blasting. Determining the impact of drilling angle on the cost of blasting is determined by analytical methods and by comparing the results of applied drilling angle methods. During the analytical analysis of the blasting data and the comparison of their results, which was performed to determine the change in the cost of blasting depending on the drilling angle, and it concluded that for the removal of 200000 (m3) rock material, 356167.98 (€) can be saved, by applying the 90° angle drilling method. This change of drilling angle from the projected angle of 63° to the angle of drilling 90°, reduces the total cost of blastings by about 10.69 (%).
2
Tampubolon, Amri, E. P. S. B. Taman Tono, and Anisa Indriawati. "KajianEkonomis Perencanaan Pengeboran Dan Peledakan Antara Kemitraan Dengan PT Bukit Asam (Persero) Tbk Pada Wilayah Pit II Banko Barat Di Tanjung Enim Sumatera Selatan." MINERAL 3, no. 1 (January 30, 2020): 16–23. http://dx.doi.org/10.33019/mineral.v3i1.1570.
Повний текст джерелаАнотація:
In 2017 PTBA plans to open pit mining in Banko Barat Pit II uses a system of drilling and blasting. Drilling and blasting activities aimed memberai hard material to support the process of making material by excavator-unloading With limited human resources drilling and blasting is currently assisted by partners. To get the maximum benefit with minimum cost necessary to study the cost of drilling and blasting between using the cost of services partners or self-management tool by PTBA.Planning of drilling and blasting costs PTBA version used by the method of self-management tools while the costs of drilling and blasting use the services of the partnership using the mail service offering. Geometri blasting used method R.L Ash so that would be obtained comparative cost planning and drilling and blasting between PTBA and partner services.The cost of drilling obtained using a self-management tool values obtained Rp 13.021.982.688/tahun, while using the services of the partnership obtained the value of Rp 26.472019.517/year. The cost of blasting using a self-management tool values obtained Rp 44.767.919.566/year, while using the services of the partnership obtained the value of Rp 51.750.738.054/year. The total cost of drilling and blasting self-managed appliance obtained the value of Rp 57.789.902.254/year more economical compared with services partnership with a value of Rp 78.222.757.571/year, these results show the difference in cost of Rp 20.432.855.317/year.
3
Eshun, P. A., B. O. Affum, and A. Boakye. "Drill and Blast Performance Evaluation at the Obra Pit of Chirano Gold Mines Ltd, Ghana." Ghana Mining Journal 16, no. 2 (December 20, 2016): 28–35. http://dx.doi.org/10.4314/gm.v16i2.4.
Повний текст джерелаАнотація:
This paper investigates the causes of inefficient fragmentation and formation of toes in the Obra pit of Chirano Gold Mines Ltd and recommends best practices in order to produce optimum fragmentation to feed the crusher at a reduced cost and to provide good working pit floors. The methods employed included: drilling performance analysis using statistical methods; fragmentation analysis of blasting performance using Kuz-Ram Model and Wipfrag software; determination of the velocity of detonation of the bulk explosive using MREL Micro Trap VOD/Data Recorder; and estimation of the cost of secondary drilling and blasting using Mine Management Reporting Software. From the analyses, it was observed that the blast designed parameters and blasting practices were acceptable to produce good fragmentation but the actual drilling parameters deviated from the designed parameters by about 25%, 24% and 26% in hole depth, burden and spacing respectively. It was concluded that the cause of the ineffective fragmentation leading to high cost of secondary breakage and uneven pit floors was due to operational errors during drilling. It is therefore recommended that in order to reduce excessive deviations in the drilling parameters, periodic training of operators must be conducted, supervision of drilling and blasting operations must be enhanced, and inclinometers should be used during drilling activities to ensure the accuracy and precision of all blast holes. Keywords: Drilling, Blasting, Fragmentation, Kuz-Ram Model, Wipfrag Software
4
KANE, W. F. "Drilling and Blasting of Rocks." Environmental & Engineering Geoscience III, no. 1 (March 1, 1997): 154. http://dx.doi.org/10.2113/gseegeosci.iii.1.154.
Повний текст джерела
5
Tori, Matija, Stanojle Vajović, Niko Goleš, Elvir Muhić, and Miha Peternel. "Use of a Combination of Vertical and Horizontal Boreholes in Massive Blasting of Benches in the Surface Quarry Rodež." Materials and Geoenvironment 64, no. 4 (December 1, 2017): 189–98. http://dx.doi.org/10.1515/rmzmag-2017-0017.
Повний текст джерелаАнотація:
AbstractThis article deals with the extraction of minerals (limestone/marl/flysch) in the quarry Rodež, which is located in western Slovenia. During the extraction of minerals in a quarry, drilling and blasting of benches are used. The focus of the article is on the analysis of the parameters related to drilling and blasting in surface excavations when using a combination of explosions and introducing horizontal wells along with vertical holes in the bench. On the basis of the analysis of basic parameters through a combination of drilling horizontal wells and charging those with the ammonal + Anfex explosive, analyses of effects of seismic disturbances on potentially affected buildings have also been conducted. The article is connected to and deals exclusively with the basic parameters of drilling and blasting, with the introduction of horizontal drilling and with the analysis of seismic measurements of threatened buildings in accordance with the German standard German Institute for Standardisation (DIN) 4150 during the use of a new method of blasting.
6
Li, Lin Na, and Dong Wang Zhong. "Study on the Optimizing Parameters of Underwater Drilling Blasting." Applied Mechanics and Materials 193-194 (August 2012): 614–18. http://dx.doi.org/10.4028/www.scientific.net/amm.193-194.614.
Повний текст джерелаАнотація:
Optimizing design of parameters is essential for the underwater blasting. The key point of optimizing model is to reflect the relation of blasting parameters, rock fragmentation and operation cost. In this paper, the blasting optimization mathematical model is established, and the optimization of the blasting parameters is obtained using the complex method with computer. Calculation results show that the blasting parameters designed by the optimizing model make the engineering cost lowest.
7
Hao, Feng Shan, Gui Zhong Tian, and Tu Long Wang. "The Process Hypothesis and Feasibility Study on Drilling-Blasting Machine Method in Tunnel Excavation." Applied Mechanics and Materials 256-259 (December 2012): 1316–19. http://dx.doi.org/10.4028/www.scientific.net/amm.256-259.1316.
Повний текст джерелаАнотація:
This paper was based on many pre-existing or being successful tunnel projects for study. Through in-depth investigation and analysis of the action mechanism on rock and the construction control under complex geological conditions, the author synthesized the technical advantages of the drilling-blasting method and tunnel boring machine technology into integration as a new drilling-blasting machine method applied in tunnel (lane) excavation. If this method intended by conventional process, it’s difficult to realize mechanized continuous excavating. In this problem, the author put forward two new technologies named helicoid tunnel face and shallow blasthole close blasting to improve. Respectively from the theory, economic, technology and safety, the paper demonstrates the feasibility of drilling-blasting machine method.
8
Ortega Ramos, Camilo Andres, Andres Felipe Jaramillo Gil, and Jorge Martin Molina Escobar. "Drilling grid blasting upgrading based on Geological Strength Index (GSI), case “La Maruja” mine, Colombia." Boletín de Ciencias de la Tierra, no. 40 (July 1, 2016): 32–38. http://dx.doi.org/10.15446/rbct.n40.52199.
Повний текст джерелаАнотація:
Having proper rock masses characterization is of great importance in underground mining works to make the right decisions in terms of sustenance and other tasks like is the case of drilling and blasting. Here it is proposed the built of a geomechanical table based in the GSI through which to decide the drilling grid configuration applies for each rock type. This improves production cycles and explosives consumption in blasting. This table is created from experimental trials in blasting of panels with different drilling grid geometries, the ranging from 60x60cm up 80x80 cm; and the main parameter to ensure is a maximum particle size of 30 cm after the blasting with 24.6% costs reduction.
9
Xin, Chun Lei, and Bo Gao. "Dynamic Analysis of Tunnel Blasting Excavation Effect on Overpass." Advanced Materials Research 971-973 (June 2014): 992–96. http://dx.doi.org/10.4028/www.scientific.net/amr.971-973.992.
Повний текст джерелаАнотація:
Although drilling and blasting method is widely used to excavate tunnel structures, it has great effect on adjacent ground structures. In order to find out the influence sphere and features of this construction method on overpass, three-dimensional numerical simulation method was used to analyze the displacement, stress and blasting vibration velocity of overpass. The results show that: (1) Drilling and blasting excavation method can cause differential settlement of stratum and overpass which is above the crown of tunnel. (2) The strong constraint structures of overpass are obviously affected by blasting vibration than other parts. (3) It should be taken extra protection measures at connection points between piers and decks as well as connection points between piers and stratum. (4) Horizontal vibration velocity caused by blasting excavation is lower than vertical vibration velocity. To control the vertical blasting vibration velocity is the essential to control the security of tunnel structure and upper structures. The above results certainly contribute to construct tunnel structures by using drilling and blasting excavation under complicated conditions.
10
Huang, Banma, Haibo Chen, Chenglong Duan, and Wenhu Li. "Stability Analysis and Construction Parameter Optimization of Tunnels in the Fractured Zone of Faults." International Journal of Analytical Chemistry 2022 (August 31, 2022): 1–11. http://dx.doi.org/10.1155/2022/2211499.
Повний текст джерелаАнотація:
In order to improve the construction method of highway tunnel fault, improve the excavation level, improve the construction efficiency, reduce the project cost, and shorten the construction period, so as to find a specific road, this paper puts forward the research method of tunnel stability analysis and construction parameter optimization in the fault fracture zone. First, this paper analyzes the specific geographical and geological environment of the construction site. Second, this paper compares and analyzes the effects of the drilling and blasting method and full-face tunnel boring machine (TBM) in construction and further analyzes the surrounding rock deformation, over excavation, and under excavation, as well as the range of loose circles when the surrounding rock is stable. Then, this paper discusses the minimum smooth blasting parameters under these conditions. Finally, the actual blasting effect of tunnel construction is tested and the optimization algorithm model of tunnel fault drilling and blasting parameters is established. The results show that the proposed optimization model of drilling and blasting construction parameters for highway tunnel faults based on the Support Vector Regression (SVR) algorithm combined with a genetic algorithm (GA) has a short calculation time and high parameter optimization accuracy. It is very feasible to optimize the construction parameters of the fault drilling and blasting method, which can greatly improve the construction efficiency, carry out the detailed simulation, reduce the cost, and increase safety. In summary, it has a certain reference significance for the optimization of highway tunnel construction and future research by drilling and blasting method under complex geological conditions in my country.
11
Hussan, Bolatkhan, Daulet Takhanov, Sergey Kuzmin, and Sharabidin Abdibaitov. "Research into influence of drilling-and-blasting operations on the stability of the Kusmuryn open-pit sides in the Republic of Kazakhstan." Mining of Mineral Deposits 15, no. 3 (September 2021): 130–36. http://dx.doi.org/10.33271/mining15.03.130.
Повний текст джерелаАнотація:
Purpose. Research into influence of drilling-and-blasting operations on the nature of deformation in near-side masses of the design open-pit contours and assessing the seismic impact of blasting operations, which are the basis for development of recommendations on the rational parameters of drilling-and-blasting operations. Methods. The influence of drilling-and-blasting operations at the limiting contour of the Kusmuryn field is studied using the analysis of the mining-and-geological conditions and tectonics of the rocks constituing the field, in-situ surveying the state of the open-pit sides, analysis of the physical and mechanical properties of the host rocks, analytical studies and instrumental measurements of the blasting effect. Findings. Based on the analytical methods, the calculation and analysis of the seismic stability of the rocks at the field have been performed. By means of instrumental measurement of the blasting effect in open pit, data have been obtained on the seismic impact of blasting operations on the near-side masses. According to the results of these works, rational parameters of drilling-and-blasting operations at the limiting contour of the open pit have been determined. In addition, the main provisions for the organization of drilling-and-blasting operations at the limiting contour of the open pit have been developed. Originality. In this work, for the first time, a joint research method is applied, which includes an analytical calculation of the shock wave seismic impact on a rock mass, based on the results of which the dependency graphs have been obtained of the seismicity coefficient on the rock hardness coefficient at the Kusmuryn field according to the Protodyakonov scale for various explosives, as well as using the method of instrumental measurements, which serves to determine the seismic impact of an explosion on a rock mass. This makes it possible to substantiate the technology of conducting the drilling-and-blasting operations at the contour, providing a long-term stable position of the permanent side of the open pit. Practical implications. The results of the work will be used to calculate the safe parameters of conducting the blasting operations when placing the side in the final position at the Kusmuryn field. This research method can be applied at any mining enterprise conducting open-cut mining of minerals.
12
Triyanto, Bambang, and Risanto Panjaitan. "KAJIAN TEKNIS KEGIATAN PELEDAKAN DI PT. SEMEN BOSOWA MAROS SULAWESI SELATAN." INTAN Jurnal Penelitian Tambang 2, no. 1 (February 27, 2022): 55–59. http://dx.doi.org/10.56139/intan.v2i1.22.
Повний текст джерелаАнотація:
Drilling and blasting activities in PT. Semen Bosowa Maros quarry aims to dismantling limestones of the host rock with fragmentation expected size of ≤100 cm, considered the maximum size of rock crusher receive opening. The drilling pattern used is staggered pattern, while blasting pattern used is blasting streak pattern, with ignition of one line and straight lines of the one between next line. Based on observations in the field, the boulder that came from the blasting activities are relatively high at 20.63 %. To reduce the resulting chunks of the rock blasting activity, it’s important to change the geometry of blasting base formulation expressed by R. L. Ash, thus changes the distance to 3.1 m; spacing to 3.7 m; stemming height to 3.14 m; bench height to 5.80 m and depth of blasting hole to 6.10 m. With the new blasting geometry, lump sized rocks >100 cm generated from operating activities actual blasting theoretical calculations amounting only 14.82 %.
13
Hussan, B., M. I. Lozynska, D. K. Takhanov, A. O. Oralbay, and S. L. Kuzmin. "Assessing the quality of drilling-and-blasting operations at the open pit limiting contour." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 6 (2021): 42–48. http://dx.doi.org/10.33271/nvngu/2021-6/042.
Повний текст джерелаАнотація:
Purpose. To develop a methodology for assessing the quality of drilling-and-blasting operations when setting the side to the final position. In this regard, it is necessary to study the nature of deformations in the near-side masses of the design open-pit contours and to assess the seismic impact of blast waves in accordance with damage in the near and far zones from the open-pit boundary, as well as the level of generated seismic vibrations. Methodology.A methodology for assessing the quality of drilling-and-blasting operations at the limiting contour of open pits is developed using the analysis of the mining-and-geological conditions of the rocks constituting the field, in-situ surveying of the state of the open-pit sides, analysis of the physical-mechanical properties of the host rocks, analytical studies and instrumental measurements of the blasting effect. Findings.Based on the analytical methods, the calculation and analysis of the seismicity coefficient of the rocks at the field have been performed. By means of instrumental measurement of the blasting effect in open pit, data have been obtained on the seismic impact of blasting operations on the near-side mass. Based on the results of these works, a methodology for assessing drilling-and-blasting operations at the limiting contour of the open pit has been developed. Originality.In this work, to assess the blasting effect, the seismicity coefficient of the rock mass is used, which characterizes the degree of elastic response to external dynamic influence and is a parameter that determines the elastic seismic wave intensity with distance from the site of blasting operations. Based on the calculation, a map of the seismicity coefficient distribution in the open-pit area has been compiled. Using the method of instrumental measurements, which serves to determine the seismic impact of blasting on a rock mass, the degree of blasting effect on a near-side mass has been revealed. This made it possible to develop a method for assessing the blasting quality, based on determining the percentage of permissible deviations in the face drilling quality. Practical value.The results of the work will be used to calculate the safe parameters of conducting the blasting operations when setting the side to the final position. This method for assessing the quality of drilling-and-blasting operations can be applied at any mining enterprise conducting open-cut mining of minerals.
14
Sinitsyn, Denis. "Drilling-and-blasting method of demolition." MATEC Web of Conferences 170 (2018): 03019. http://dx.doi.org/10.1051/matecconf/201817003019.
Повний текст джерелаАнотація:
This article analyzes the experience and gives the examples of dismantling and demolition of the construction structures of the buildings and facilities using the drilling-and-blasting method. The drilling-and-blasting method is widely used in construction and reconstruction. The demolition means may be classified according to impact on a material of structures to be demolished and to forces application, where, by virtue of an impact energy type, we choose the blasting method. This method is used during the complete demolition or fragmentation of concrete, reinforced concrete, masonry structures, of old buildings and facilities demolition to their base or in the intended direction. Blasting method may be used as well during the steel and reinforced concrete structures demolition to the smaller easy-to-move parts. Reviewed are the organizational-process activities, which are performed during the various structures dismantling. Given are the areas of application for the various methods of structures demolition. Given is the example of demolition of “Sevemaya” boiler house brick chimney at the territory of Murmansk DSK using the blast in confined spaces of the operating company. Subject of research: methods of construction structures demolition in alarm situations and acts of God. Objects: determination of the most efficient demolition methods in the present conditions of construction operations development. Materials and methods: the developed activities on the construction structures dismantling are given. Results: the most efficient methods and ways of construction structures demolition are defined. Conclusions: it is required for improvement of methods and ways of the structures drilling-and-blasting demolition.
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Isheyskiy, Valentin, Evgeny Martinyskin, Sergey Smirnov, Anton Vasilyev, Kirill Knyazev, and Timur Fatyanov. "Specifics of MWD Data Collection and Verification during Formation of Training Datasets." Minerals 11, no. 8 (July 22, 2021): 798. http://dx.doi.org/10.3390/min11080798.
Повний текст джерелаАнотація:
This paper presents a structured analysis in the area of measurement while drilling (MWD) data processing and verification methods, as well as describes the main nuances and certain specifics of “clean” data selection in order to build a “parent” training database for subsequent use in machine learning algorithms. The main purpose of the authors is to create a trainable machine learning algorithm, which, based on the available “clean” input data associated with specific conditions, could correlate, process and select parameters obtained from the drilling rig and use them for further estimation of various rock characteristics, prediction of optimal drilling and blasting parameters, and blasting results. The paper is a continuation of a series of publications devoted to the prospects of using MWD technology for the quality management of drilling and blasting operations at mining enterprises.
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Pradatama, Dhion, Chani Pradasara, and M. Syafiq Isnaya. "The application of “line drilling” and “buffer holes” methods to reduce blasting vibration." IOP Conference Series: Earth and Environmental Science 882, no. 1 (November 1, 2021): 012057. http://dx.doi.org/10.1088/1755-1315/882/1/012057.
Повний текст джерелаАнотація:
Abstract PT Multi Nitrotama Kimia is one of the largest mining service companies that provide blasting services and sales of explosives in Indonesia. PT Putra Perkasa Abadi Jobsite Borneo Indobara is one of PT Multi Nitrotama Kimia’s customers who is facing challenges in optimizing blasting activities. Currently, blasting activities at PT Putra Perkasa Abadi Jobsite Borneo Indobara are carried out within 500 m of the active slope, so that the blasting distance is optimized. In optimizing the blasting distance, it is necessary to maintain slope conditions (no underbreak / no overbreak) and to consider the vibration of blasting results on the slopes. The line drilling method was chosen for the blasting trial stage. In the observation activity, an analysis of the resulting blasting and fragmentation vibrations was carried out. Precise planning and good control in field operations play an important role in this experimental process. Based on the results of the blasting trial, no damage was found in the area 25 m – 100 m from the blasting location and a 10% - 20% reduction in blasting vibration results (Peak Vector Sum) was obtained when compared between normal blasting designs with controlled blasting designs.
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Mertuszka, Piotr, Marcin Szumny, Krzysztof Fuławka, and Stanislav Nikolov. "FIELD EVALUATION OF MINE BLASTING EFFICIENCY." SWS Journal of EARTH & PLANETARY SCIENCES 2, no. 2 (June 1, 2020): 1–16. http://dx.doi.org/10.35603/eps2020/issue2.01.
Повний текст джерелаАнотація:
The efficiency of drilling and blasting operations can be assessed in different ways, depending on the desired effect. The evaluation can be performed on the basis of the quality of the explosives applied for rock extraction. On the other hand, the correct assessment should include the results of drilling and blasting works. One of the parameters that are commonly used in the quality assessment of explosives is the on-site testing of the detonation velocity, which is a direct indicator of the efficiency of explosives. The quality of explosives is essential for the appropriate blasting process and should be subjected to regular verification by means of measurements under different site conditions. Since in most cases the excavated rock must be transported from the blasting site to another location, one of the main parameters that can be used for drilling and blasting operations assessment is fragmentation analysis. It may be done using various image-based particles sizing software. The article presents selected methods that can be applied for the evaluation of blasting works efficiency, including measurements of detonation velocity as well as fragmentation analysis based on photogrammetric methods.
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Tosun, A. "A new method for determining muckpile fragmentation formed by blasting." Journal of the Southern African Institute of Mining and Metallurgy 122, no. 11 (January 17, 2023): 1–8. http://dx.doi.org/10.17159/2411-9717/1104/2022.
Повний текст джерелаАнотація:
Muckpile fragmentation formed by blasting depends on the specific charge factor, the discontinuities in the rock mass, and the rock strength. Determination of the discontinuity characteristics and rock strength is a long and difficult process. These two parameters are directly associated with the rock drilling speed. Therefore, it is the drilling speed of the machine used for the blast-hole, rather than the blasthole discontinuity characteristics and rock strength parameters, that is used in the prediction of muckpile fragmentation before blasting. Primarily, it has been suggested that the muckpile fragmentation values can be correctly determined by establishing correlations between the efficiency of the loader and muck pile fragmentation, since fragmentation is directly correlated with the former parameter. Subsequently, a correlation predicting the drilling speed of the drill machine was developed according to the discontinuity characteristics of the blasting surface and the rock strength. Finally, a correlation was developed predicting muckpile fragmentation according to the specific charge factor and the drilling speed of the drill machine The data was obtained by conducting blasting tests in two different limestone quarries.
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Zharikov, Sergey, and Vyacheslav Kutuev. "Influence of dynamics of development of open mining on technological features of blasting breaking." E3S Web of Conferences 56 (2018): 01001. http://dx.doi.org/10.1051/e3sconf/20185601001.
Повний текст джерелаАнотація:
The paper desribes the results of the analysis of the drilling and blasting index at some large enterprises. The significant period of their work has been considered. The increase in the specific consumption of explosives by years has been shown and the reasons for this increase have been explained. The issue of the development prospects of the drilling and blasting complex in terms of reducing the cost of explosives, as well as some issues associated with the use of explosives, manufactured on site. It is suggested that in the near future the development of open mining will be associated with the acceleration of processes and a significant increase in their intensity, both in the development of new ones and in the refinement of existing large open-pit mines. In this regard, drilling and blasting operations are waiting for certain changes in both the mechanization of processes and the technological methods of production. An approach is proposed for improving energy efficiency and resource saving in the production of drilling and blasting operations, which consists in applying a horizontal cut along the bottom of the bench with blasting breaking of the rock mass. It has been previously shown that the use of this method of breaking can be quite effective in comparison with the traditional approach.
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Slyambekov, Nurbek. "Review of the use of advanced technologies in drilling and blasting." Geo-Technical Mechanics, no. 159 (2021): 108–14. http://dx.doi.org/10.15407/geotm2021.159.108.
Повний текст джерелаАнотація:
The mining industry is the main blasting process, the quality of performance which depend on all subsequent processes of extraction and processing of minerals. In recent decades, conducting blasting technology has been rapid development. New technologies in drilling and blasting, and include the introduction of high-performance drilling rigs, and the use of safer emulsion explosives, and the use of new means of priming. It is noted that the reduction in cost BSB is mainly achieved through the introduction of electronic blasting initiation system that provides reliable synchronization alternately triggered wells. This technology helps to maximize the use of the control system for the release of explosive energy, and each works well guaranteed in a certain sequence that allows you to avoid the adverse effect of "overlay", ie simultaneous operation of several wells. In addition, significantly reduced the negative influence of seismic and acoustic mass explosions in the environment, reduces the emission of harmful combustion products and dust in the atmosphere. The main result has improved the results of blasting operations, reducing the percentage of oversize and exit screenings, and they thus reduce the cost of excavation, transportation and processing of blasted mass. Currently in production blasting in the world there are different systems of priming. The article discusses the principle of operation and parameters of one of the most advanced in the world - the electronic charge initiation system I-KON™. It is shown that due to the high accuracy of electronic detonators and a wide range of possible delays, it is possible to choose a blasting scheme that exactly matches the conditions for drilling and blasting. The I-KON™ system under consideration contributes to seismic safety and makes it possible to achieve an optimal distribution of the explosion energy in the array. At the same time, BVR optimization is possible by selecting appropriate schemes for mounting the explosive network. The result is a more efficient crushing of the rock mass, which can help reduce drilling and blasting costs.
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Wenbin, Gu, Chen Jianghai, Wang Zhenxiong, Wang Zhihua, Liu Jianqing, and Lu Ming. "Experimental Study on the Measurement of Water Bottom Vibration Induced by Underwater Drilling Blasting." Shock and Vibration 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/496120.
Повний текст джерелаАнотація:
Due to the lack of proper instrumentations and the difficulties in underwater measurements, the studies about water bottom vibration induced by underwater drilling blasting are seldom reported. In order to investigate the propagation and attenuation laws of blasting induced water bottom vibration, a water bottom vibration monitor was developed with consideration of the difficulties in underwater measurements. By means of this equipment, the actual water bottom vibration induced by underwater drilling blasting was measured in a field experiment. It shows that the water bottom vibration monitor could collect vibration signals quite effectively in underwater environments. The followed signal analysis shows that the characteristics of water bottom vibration and land ground vibration induced by the same underwater drilling blasting are quite different due to the different geological environments. The amplitude and frequency band of water bottom vibration both exceed those of land ground vibration. Water bottom vibration is mainly in low-frequency band that induced by blasting impact directly acts on rock. Besides the low-frequency component, land vibration contains another higher frequency band component that induced by followed water hammer wave acts on bank slope.
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Liu, Jian, and Qian Le. "Experimental Study on Deep Borehole Pre-Cracking Blasting of Drilling through Strata at Low Permeability Seam." Advanced Materials Research 868 (December 2013): 339–42. http://dx.doi.org/10.4028/www.scientific.net/amr.868.339.
Повний текст джерелаАнотація:
In the process of roadway excavation in the low permeability outburst coal seam, with drilling through strata in the bottom drainage roadway extracting coal seam gas of control area. In order to improve extraction effect, the method that deep borehole pre-cracking blasting is used to increase the permeability of coal in the drilling through strata seam segment is proposed. The calculation formula on crushing circle and crack circle radius of deep borehole pre-cracking blasting are derived, and the effective loosening radius of blasting is calculated in theory, the research achievements are applied to field test, the test results show that deep borehole pre-cracking blasting permeability improvement technology is carried out in the drilling through strata of the low permeability outburst coal seam, the permeability of coal seam is improved by 180 times, the gas extraction scalar is raised by 8-10 tomes, during the process of roadway excavation, gas concentration of the working face is 0.2%-0.3%, and tunneling footage is increased by 2 times.
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Zhao, Jin Xian, Min Liu, and Fan Li. "The Study on Safety Management of Drilling-Blasting Metro Station Construction Based on OWA Operator and Gray Theory." Applied Mechanics and Materials 744-746 (March 2015): 997–1000. http://dx.doi.org/10.4028/www.scientific.net/amm.744-746.997.
Повний текст джерелаАнотація:
This paper proposes safety management evaluation system of metro station project based on factors which the construction techniques and process of drilling-blasting metro station involved.Then the paper uses the OWA operator to determine the weights of the index and adopts gray theory to evaluate safety of drilling-blasting metro station construction based on measure of metro station project safety management.Finally,the paper puts forward recommendations of safety management according to the evaluation results.
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Wang, Xiaolin, and Wei Yin. "Application of Smooth Blasting in Yazhugou Tunnel." E3S Web of Conferences 136 (2019): 04038. http://dx.doi.org/10.1051/e3sconf/201913604038.
Повний текст джерелаАнотація:
This paper takes Yazhugou Tunnel, a highway project in the upper reaches of the Yalong River as the example to summarize the application of smooth blasting in the Yazhugou Tunnel from the aspects of the feasibility, resource allocation, blasting parameters, drilling and blasting technology and the guarantee measures, with the construction characteristics of the tunnel blasting, the type of surrounding rocks, construction technology and cost taken into consideration.
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Minieiev, Serhii, Oleksandr Kostrytsia, Alla Prusova, Roman Skachko, Oleksandr Dykan, and Vira Maltseva. "Justification of the parameters for safe blasting of floor rocks in the roadway driven through the hazardous by outbursts sandstones." Geo-Technical Mechanics, no. 159 (2021): 11–29. http://dx.doi.org/10.15407/geotm2021.159.011.
Повний текст джерелаАнотація:
In this article, the authors provide the substantiation of the parameters for safe floor rocks ripping by drilling-and-blasting technique in the roadway driven through the hazardous by outburst sandstones by way of forming an unloaded (nonhazardous by outburst) zone from the side of previously driven roadway. The nomogram of numerical values of stresses is given for the conditions of the Pokrovskoe Mine, 1st northern belt road, panel No. 11. From the given calculations, radius of the unloaded nonhazardous by outburst zone in the vertical and horizontal planes around the driven experimental roadway of the 1st northern belt road, panel No. 11, was obtained with accounting anisotropy, depth of mining operations and rate of deformation. The analysis of the material presented in the article allows to conclude that the unloading effect of the driven roadway predetermines the safety of mining operations conducted in the hazardous by outburst sandstone, and drilling-and-blasting operations within the calculated protected zone can be performed as in the nonhazardous by outburst zone. In this research, regularities of the unloading effect of the roadways were established, and dependences were obtained to determine boundaries of the unloading zones in specific mining and geological conditions, which should be determined for each concrete roadway to perform the blasting operations. The presented justifications come to the fact that drilling-and-blasting operations used for ripping hazardous by outburst rocks in the roadway floor are carried out in the already unloaded (i.e. nonhazardous by outburst) zone, which is created from the same, previously driven, roadway. That is, it follows that drilling-and-blasting operations will be carried out in sandstone with no outburst hazard. This makes it possible to perform the drilling-and-blasting operations without making the forecast of the mine outburst hazard and without introducing the shock blasting mode, which, in turns, cut the time and labor costs and lead to significant savings of material and technical means. A further research is needed for establishing dependence between the size of the formed unloaded (nonhazardous by outburst) zone around the working roadway in sandstone and depth of mining operations, section of the roadway and time passed since the roadway was driven.
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Yang, Jing, Xing-Guo Yang, Jia-Wen Zhou, Yong Liu, Bao-Shun Dong, and Hai-Bo Li. "Comparative Study of the Excavation Damage and Rockburst of the Deeply Buried Jinping II Diversion Tunnels Using a TBM and the Drilling-Blasting Method." Advances in Civil Engineering 2020 (December 9, 2020): 1–14. http://dx.doi.org/10.1155/2020/8876214.
Повний текст джерелаАнотація:
The rock mass failure induced by high in-situ stresses during the excavation of deep diversion tunnels is one of the key problems in the construction of the Jinping II Hydropower Station. Based on the results of acoustic wave tests and rockburst statistical analysis conducted, this study focuses on the excavation damaged zone (EDZ) and rockburst events in the Jinping II diversion tunnels excavated using the tunnel boring machine (TBM) method and the drilling-blasting method. The unloading failure mechanism and the rockburst induced by the two different excavation methods were compared and analyzed. The results indicate that, due to the different stress adjustment processes, the degree of damage to the surrounding rock mass excavated using the drilling-blasting method was more serious than that using the TBM method. The EDZ induced by the TBM was usually distributed evenly along the edge of the excavation surface. While, the drilling-blasting method was more likely to cause stress concentration, resulting in a deeper EDZ in local areas. However, the TBM excavation method can cause other problems in high in-situ stress areas, such as strong rockbursts. The drilling-blasting method is more prone to structural controlled failure of the surrounding rock mass, while the TBM method would induce high stress concentration near the edge of excavation and more widely distributed of stress adjustment induced failure. As a result, the scale and frequency of the rockburst events generated by the TBM were significantly greater than those caused by the drilling-blasting method during the excavation of Jinping II diversion tunnels. The TBM method should be used carefully for tunnel excavation in high in-situ stress areas with burial depths of greater than 2000 m. If it is necessary to use the TBM method after a comprehensive selection, it is suggested that equipment adaptability improvement, advanced prediction, and prediction technology be used.
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Nguyen, Thanh Chi, Anh Ngoc Do, Vi Van Pham, and Gospodarikov Alexandr. "Multiple linear regression analysis model and artificial neural network model to calculate and estimate the blast induced area of the tunnel face. A case study Deo Ca tunnel." Journal of Mining and Earth Sciences 63, no. 3 (June 30, 2022): 43–52. http://dx.doi.org/10.46326/jmes.2022.63(3).06.
Повний текст джерелаАнотація:
The area of the tunnel face after the blasting is a very important factor in underground excavations where the drilling and blasting method is used. The area of the tunnel face, this is a significant factor that has affected the cost and safety of underground constructions in case of using the drilling and blasting method in underground excavations. Because the area of the tunnel after the blasting depends on many different parameters, such as geological conditions in the area where the tunnel is located, the parameters of the explosion, and other parameters of the tunnel, it is very difficult to accurately determine the value of the tunnel face area after blasting. This paper uses the data obtained in the actual blasting of the Deo Ca tunnel (39 datasets) to build the computational and prediction models for the area of the tunnel face after blasting by two methods, the multiple linear regression analysis method and the method of using artificial neural network (ANN). Determination coefficient R2 of multiple linear regression analysis (MLRA) method and ANN method were obtained at 0.9224, and 0.9449, respectively. The applicability of the multiple linear regression analysis method and ANN method in calculating and predicting tunnel face area after blasting were validated based on a comparison with the results of the tunnel face area after blasting in practice.
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Chai, Xiu-wei, Sha-sha Shi, Yao-feng Yan, Jian-guo Li, and Long Zhang. "Key Blasting Parameters for Deep-Hole Excavation in an Underground Tunnel of Phosphorite Mine." Advances in Civil Engineering 2019 (December 5, 2019): 1–9. http://dx.doi.org/10.1155/2019/4924382.
Повний текст джерелаАнотація:
Ever increasing mine production capacity and mechanized operations enable advanced drilling equipment to be widely adopted in underground mines. In order to achieve satisfactory blasting performance in tunnel advance, there is a critical need to optimize the blasting technique to match the large deep-hole drilling capability. In this study, through theoretical analysis of tunnel blasting, the layout of cutting holes was found to be the key factor controlling the blasting performance. The deep-hole cutting effect was first investigated by analyzing the influence of the free surface of a hollow hole using the fluid-structure interaction modeling method in ANSYS/LS-DYNA. Then the rock dynamic evolution processes of blasting using a double-cavity grooving and a four-cavity grooving were compared and analyzed towards an understanding of the influence of the spacing and layout of cutting holes on the blasting performance. The comparison results show that four empty hole cut layouts yield larger effective free surface than that of the two empty hole cut layouts. This is because larger compensation space for breaking of rock and expansion of gas is more conducive to improving the energy utilization rate of explosives and thus improving the blasting performance and the footage of cyclic blasting. The results indicated that the blasting performance can be improved by reserving reasonable compensation space in the grooving area.
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V. I. PETRENKO, E. M. SHATAYKIN, V. D. PETRENKO, and A. L. TIUTKIN. "DRIVING OF INCLINED SHAFTS OF CYCLIC-LINE PRODUCTION TECHNOLOGY IN INGULETS IRON ORE ENRICHMENT WORKS WITH USE OF DRILLING AND BLASTING OPERATIONS." Bridges and tunnels: Theory, Research, Practice, no. 11 (December 10, 2017): 52–58. http://dx.doi.org/10.15802/bttrp2017/158588.
Повний текст джерелаАнотація:
Purpose. Implement an estimate of the driving methods efficiency of inclined shafts of cyclic-line production technology at Ingulets Iron Ore Enrichment Works with use of drilling and blasting operations when breaking the strongest rocks. Methodology. In order to achieve this purpose, the main factors influencing the implementation of the effective technology of driving the inclined shafts. Findings. The level of efficiency of the developed technology is substantiated. Originality. The rational scheme and parameters of drilling and blasting operations with a combined application of short- delayed and delayed explosion of borehole charges have been developed. Practical value. The rational parameters of blasting operations during the construction of inclined shafts have been integrated.
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Pytalev, I. A., D. V. Domozhirov, E. E. Shvabenland, A. A. Prokhorov, and V. V. Pronin. "A method to improve the quality of rock preparation for extraction with emulsion explosives in open-pit mines with high benches." Mining Industry Journal (Gornay Promishlennost), no. 6/2021 (January 15, 2022): 62–67. http://dx.doi.org/10.30686/1609-9192-2021-6-62-67.
Повний текст джерелаАнотація:
Increasing the production capacity of open-pit and strip mines while ensuring the efficiency of the mining enterprise can be achieved through enhancing the quality of rock preparation prior to excavation. The use of emulsion explosives and the transition to the high-bench technology can reduce the cost of mining operations by optimizing the drilling and blasting parameters. The article reviews methods to improve the efficiency of rock preparation for extraction based on the applicable scientific and methodological principles and it proposes a method to regulate the density of emulsion explosives. Schemes are presented for calculation of drilling and blasting parameters when implementing technical measures aimed at improving the blasting quality through rock preparation for extraction in conditions of overburden and mining operations with bench height of 15 m and higher. Parameters of drilling and blasting operations on high benches are justified with differentiation of the charge density along the length of the blast hole by controlling the delivery of the gas-generating additive. A simulation has been performed and the results of pilot tests of the emulsion explosive charge density control at the Ural deposits are presented.
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Nguyen, Thai Hong, and Thai Quang Nguyen. "A kinematic control algorithm for blasthole drilling robotic arm in tunneling." Science and Technology Development Journal 20, K5 (August 31, 2017): 13–22. http://dx.doi.org/10.32508/stdj.v20ik5.1153.
Повний текст джерелаАнотація:
The most typical method of tunneling in complicated geographical conditions is still blasthole drilling. To improve the efficiency of the work, Vietnam and several other countries have used drilling devices fitted with self-propelled hydraulic seven-link robotic arms which can also be manually controlled to modernize the drilling and blasting processes and improve the accuracy of the work. The task of controlling the robotic arm to automatically drill the holes exactly as specified in the passport of blasting prepared by geotechnical and underground construction engineers requires a control algorithm for the controller of the robot. The matter will be clearly presented in this article.
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Yang, Yuqing, Xiaohua Ding, Wei Zhou, Xiang Lu, Manda Ebelia, Wen An, Jinyu Li, and Xiaonan Zhang. "Open-Pit Mine Geological Model Construction and Composite Rock Blasting Optimization Research." Shock and Vibration 2022 (March 28, 2022): 1–9. http://dx.doi.org/10.1155/2022/1468388.
Повний текст джерелаАнотація:
In this paper, the blasting parameters are designed based on the drilling data of the exploration geological stage, the geophysical and mechanical parameters of the mining area, and the geological age information, and the numerical simulation of the blasting of the layered rock steps is carried out to optimize the blasting parameters. Multiple sets of blasting tests were carried out on-site, and the large block rate, average block size satisfaction rate, large block satisfaction rate, cost satisfaction rate, shovel loading efficiency, and blasting effect satisfaction rate were set as the blasting effect evaluation indicators, which verified the feasibility of the optimized scheme.
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Tyupin, V. N. "Finding velocity of roller-bit and rotary-percussive drilling using the energy conservation law." Mining informational and analytical bulletin, no. 6 (May 20, 2020): 76–84. http://dx.doi.org/10.25018/0236-1493-2020-6-0-76-84.
Повний текст джерелаАнотація:
Velocity of roller-bit and rotary-percussive drilling depends on many factors distributed in 4 groups in technical literature: rock properties, bit parameters, bit-rock interaction conditions and drilling modes. Literature sources present some very complex formulas which need finding empirical coefficients before determining drilling velocity, i.e. the formulas are difficult to use. Moreover, the formulas neglect jointing of rock masses. At the same time, mathematical relations connecting drilling velocity, drilling mode and drillability of jointed rocks will make it possible to rate drilling processes and adjust blasting parameters. These studies aim to determine velocity of roller-bit and rotary-percussive drilling using the energy conservation law. The used method of mathematical modeling allowed obtaining formulas for rock drilling velocity with regard to drilling modes, bit parameters, factor of rock hardness (strength) and rock mass jointing. The validity of the relations of the roller-bit and rotary-percussive drilling velocity is proved. The reliability of the drilling velocity formulas can be determined by means of investigations performed in open pit mines, with recording of all parameters and with mathematical processing of the data. The mathematical relations connecting drilling velocity, drilling modes, drill bit parameters and drillability of jointed rocks will enable rating of drilling and adjustment of blasting patterns.
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Milanović, Stefan, Lazar Kričak, Milanka Negovanović, Nikola Simić, and Jovan Marković. "Application of softwares for drilling and blasting." Podzemni radovi, no. 34 (2019): 77–89. http://dx.doi.org/10.5937/podrad1934077m.
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Singh, S. P. "New trends in drilling and blasting technology." International Journal of Surface Mining, Reclamation and Environment 14, no. 4 (January 2000): 305–15. http://dx.doi.org/10.1080/13895260008953338.
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Rossmanith, H. P., A. Daehnke, R. E. K. Nasmillner, N. Kouzniak, M. Ohtsu, and K. Uenishi. "FRACTURE MECHANICS APPLICATIONS TO DRILLING AND BLASTING." Fatigue & Fracture of Engineering Materials & Structures 20, no. 11 (November 1997): 1617–36. http://dx.doi.org/10.1111/j.1460-2695.1997.tb01515.x.
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Zharikov, SN. "Pit wall stability and drilling-and-blasting." IOP Conference Series: Earth and Environmental Science 262 (June 3, 2019): 012084. http://dx.doi.org/10.1088/1755-1315/262/1/012084.
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Vasil'chenko, V. I. "Drilling and blasting operations in power construction." Hydrotechnical Construction 25, no. 12 (December 1991): 749–55. http://dx.doi.org/10.1007/bf01545106.
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Soukhanouvong, Phonepaserth, Hieu Quang Tran, Hoa Thu Thi Le, Thao Qui Le, and Hoan Do Ngoc. "Developing a method to assess risks and unsafety in drilling - blasting activities at limestone quarries in Lao PDR." Journal of Mining and Earth Sciences 62, no. 5 (October 31, 2021): 84–96. http://dx.doi.org/10.46326/jmes.2021.62(5).08.
Повний текст джерелаАнотація:
Currently, the demand for stone construction materials in Lao PDR to serve industrial and traffic works is very large. Currently, the management of mining activities at limestone quarries in Lao PDR is facing many difficulties due to the existence of many types of mines, mining technologies, and equipment. The occupational safety and environmental protection used at the limestone quarries have not been paid due attention. The loss and waste of natural resources are increasing. In particular, labor accidents caused by unsafe drilling and blasting activities often occur at the limestone quarries of construction materials in all provinces of this country. The article analysed the current situation of drilling and blasting activities at the limestone quarries of construction materials of Lao PDR, thereby proposed a method to assess risks and unsafety in drilling and blasting activities at the limestone quarries for mining the construction materials to improve the efficiency of the mining management and safety in Lao PDR.
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Agyei, G., and M. Owusu-Tweneboah. "A Comparative Analysis of Rock Fragmentation using Blast Prediction Results." Ghana Mining Journal 19, no. 1 (June 30, 2019): 49–58. http://dx.doi.org/10.4314/gm.v19i1.6.
Повний текст джерелаАнотація:
This work presents prediction and optimisation of controllable parameters of drilling and blasting currently used at the Fobinso Pit of Perseus Mining Ghana Limited (PMGL). The mine faces challenges with blast particle sizes produced after primary blasting. The presence of boulders requires secondary fragmentation to further reduce the broken materials to the acceptable sizes, thereby increasing the cost of production. The mechanical properties of the rocks were determined using Protodyakonov Rock Strength Index. The drill and blast parameters were estimated using the Konya and Walter (1990), Principle of Proportionality, and Instituto Geologo Minero de España (IGME) model developed in 1987. The Modified Kuz-Ram model was used to predict and analyse the results of blasting based on the parameters such as spacing, burden, drillhole diameter, charge density, charge per hole, charge length, and powder factor. A comparative analysis of the predicted size distributions of the various models using diameters of 65 mm and 110 mm revealed no significant differences between the size fractions. The Principle of Proportionality produced the best technical and economic indices for blasting. Keywords: Fragmentation, Drilling Parameters, Primary Blasting, Models, Secondary Blasting
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Zhang, Yingcai, Jiyun Zhang, Shuren Wang, and Yubo Chen. "Controlling Vibration Speed in Tunnel Excavation Using Fine Blasting Method under Complex Environmental Conditions." Shock and Vibration 2021 (September 30, 2021): 1–10. http://dx.doi.org/10.1155/2021/6060485.
Повний текст джерелаАнотація:
It is very important to reduce the impact of blasting vibration on the surrounding structures during the tunnel drilling-blasting excavation. Taking the diversion tunnel of the urban water supply project in Zhumadian, Henan Province, China, as an example, the segmentation linear function between the drilling rig and borehole depth was established by fining blasting design. The test of the blasting number and particle vibration velocity was designed. The propagation and attenuation characteristics of blast vibration velocity in the surrounding rocks of the tunnel were analyzed by using theoretical calculation and field monitoring methods. Results show that the fine blasting design can realize the superposition of negative phase of shock waveform to reduce the vibration speed. With the increase of the blasting number, the attenuation of the particle vibration velocity shows a negative exponential function, and the dimensionless vibration velocity loss increases in a power function. The greater the loss, the greater the energy loss during the shock wave propagation process, which is more conducive to ensuring the stability of the protected buildings. The research results can provide the reference for similar engineering practices.
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Ni, Xiuyong, Suqin Han, Peng Li, and Xiwu Wei. "Cognition, Application and Discussion on Shaped Charge Hydraulic Smooth Blasting Technology." Frontiers Research of Architecture and Engineering 4, no. 2 (November 29, 2021): 5. http://dx.doi.org/10.30564/frae.v4i2.3122.
Повний текст джерелаАнотація:
In the past, the main method of tunnel excavation in China was drilling and blasting, but the biggest shortcoming of the traditional drilling and blasting method is that it is easy to cause serious overexcavation and underexcavation. At the same time, the operation cycle time of this method is long, which leads to a serious waste of resources. Not only that, a large number of toxic gases and dust produced after blasting also do harm to the health of construction workers. So this is an urgent need for a new construction technology to solve this worldwide problem. In this situation, the leading experts in the field of tunnel, "The survey and design master of China" Shi Yuxin, Liu Pei, and well known expert in explosion field, yan-sheng ding, professor Chen Chengguang and Gu Yicheng, the experts group, cooperate with The Fifth Branch of China Railway 18th Bureau in northwest project management department, developed a new technology. This technology has passed the appraisal of scientific and technological achievements organized by Tianjin Science and Technology Commission, which is shaped hydraulic smooth blasting technology. The comprehensive evaluation of the technology is "international leading" level.This paper is mainly aimed at the drawbacks of drilling and blasting construction,combined with the author's cognition and discussion on the introduction of the new technology of cumulative hydraulic blasting and the practical application effect in the tunnel excavation process of the fourth company of China Railway 14th Bureau Group in the second division of the 9th bid section of Zhangjihuai Railway in Huainan Province.
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Xie, Lixiang, Wenbo Lu, Jincai Gu, and Gaohui Wang. "Excavation Method of Reducing Blasting Vibration in Complicated Geological Conditions." Shock and Vibration 2018 (May 28, 2018): 1–12. http://dx.doi.org/10.1155/2018/2518209.
Повний текст джерелаАнотація:
Drilling and blasting method as a common excavation method is widely used in the underground engineering construction. However, in the complicated geological conditions, the path of blasting excavation available has limitation, and then the larger blasting vibration is produced, which influence the stability and safety of the protected structure. To effectively reduce the blasting vibration by optimizing the blasting excavation method, firstly, the site test on blasting vibration is conducted to obtain the blasting vibration data; secondly, the LS-DYNA software is applied to simulate the vibration generated by blasting in site test, based on back analysis on the blasting vibration, the mechanical parameters of the rock mass are obtained, and they are used to simulate six different types of blasting excavation method. According to the analysis on them, the reasonable blasting excavation method is proposed to reduce the blasting vibration which can satisfy the blasting safety regulation.
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Adhikari, Govind Raj, R. Balachander, and A. I. Theresraj. "Execution of Safe Blasting Under Adverse Conditions of a Powerhouse Complex: A Revisit to Sardar Sarovar Project, India." Technical Journal 2, no. 1 (November 10, 2020): 56–67. http://dx.doi.org/10.3126/tj.v2i1.32832.
Повний текст джерелаАнотація:
When the excavation of the underground powerhouse of the Sardar Sarovar Project, India was nearly complete, cracks were observed on the upstream and downstream walls of the powerhouse, and the installed instrumentation readings sounded an alert for the instability of the powerhouse cavern that could possibly derail the project, further excavation in the powerhouse cavern was halted. After completing stabilisation measures, the remaining underground excavations by drill and blast method were to be completed. This paper revisits case studies of controlled blasting for the remaining excavations, namely a construction ramp, turbine pits, draft tube tunnels connecting the powerhouse, and the concrete plugs erected at the exit ends of the draft tube tunnels. To ensure overall stability around the excavations, blast vibration was controlled by planning the excavations in proper sequences. The damage outside the planned line of excavations was controlled by adopting modified line drilling/smooth blasting techniques. The details of the sequence of excavations, drilling and blasting parameters, compiled from previous publications, are presented in this paper. This paper also describes the reasons why concrete plugs were erected in the draft tube tunnels, the details of the concrete plugs, the optimised drilling and blasting procedure for safe removal of the plugs, and the method adopted to quantify the damage.
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Yang, Liyun, Siyu Chen, Pengxiang Dong, Qingcheng Wang, and Chen Huang. "Orthogonal Analysis and Numerical Simulation of Rock Mechanics Parameters in Stress Field of Shaft Heading Face." Advances in Materials Science and Engineering 2020 (November 26, 2020): 1–11. http://dx.doi.org/10.1155/2020/3107364.
Повний текст джерелаАнотація:
This paper focuses on improving the blasting effect of the drilling and blasting method in the deep rock mass and solves the problems of blasthole collapse and misfire accident in the process of drilling and blasting construction of heading face. FEM software, ABAQUS, is used to simulate the stress distribution around the blasthole by extending a certain depth in the vertical direction of the shaft heading face. The sensitivity of different depths, different heading face sizes, and different lithologies on the horizontal stress distribution is analyzed by using a six-factor four-level orthogonal analysis method. The results show that the change of the radius of the heading face has the most considerable influence on the distance of the distressed zone and the stress concentration zone, followed by the lithology and the excavation depth. Also, the excavation depth has the most significant influence on the peak stress value. Through the industrial field experiment, the in situ stress of the shaft heading face is tested, and the numerical simulation results are consistent with the field monitoring results. The results reveal the law of stress distribution near the heading face, which can provide some reference for the design of blasthole depth in the drilling and blasting construction scheme.
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Lubis, Masyeba Evans, Irvani Irvani, and Haslen Oktarianty. "Kajian Teknis Geometri Peledakan Di Pit 2 Banko Barat PT Bukit Asam Tbk, Tanjung Enim, Sumatera Selatan." MINERAL 5, no. 2 (October 1, 2020): 23–28. http://dx.doi.org/10.33019/mineral.v5i2.3072.
Повний текст джерелаАнотація:
PT Bukit Asam Tbk is one of the company that runs in coal mining at South Sumatera. One of the mining activity in PT Bukit Asam Tbk is overburden stripping using blasting method. The purpose of blasting method is to soften the hard outer layer material to ease the process of excavation using drilling and hauling instrument. Analysis of blasting geometry is done in order to get the fragmentation result that appropriate to the capabilities of drilling and hauling instrument. In the location of Pit 2 Banko Barat, blasting using air decking method that is called stemdeck is done to get better fragmentation result and less explosives usage. The research consist of 10 times blasting. The actual geometry rate here as follows 6.46 m burden, 6.40 m space, 6.75 hole depth. According to three data that are chosen in condition of same powder factor result in uneven fragmentation rate. This is caused by different rain intensity. Rainfall is causing blasting hole to be wet and decreasing the blasting capabilities of explosives. Those three explosives result in 18.22 cm of total fragmentation rate. This condition is caused by the same doing to different rock structure on mining location in the making of blasting geometry design. Fragmentation rate chart shows increasing value that follow burden value. Lowest fragmentation rate is 12.46 cm with 6.38 cm burden, 0.18 kg/m3 powder factor. So that if fragmentation needed to be lower than 12.46 cm later, it is recommended to use burden under 6.38 cm when calculating the blasting geometry design.
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Tian, Jian, Peng Guo, and Zhi Qiang Li. "Research on Safety Assessment of Blasting Construction in Highway Tunnel Project." Advanced Materials Research 1065-1069 (December 2014): 383–87. http://dx.doi.org/10.4028/www.scientific.net/amr.1065-1069.383.
Повний текст джерелаАнотація:
The drilling and blasting method is popular for the construction of highway tunnel,which is easy to cause serious production safety accidents.Based on safety risk analysis of tunnel blasting construction,safety risk probability assessment index system of tunnel blasting construction was put forward,which consist of establishment of blasting scheme,belection of blasting equipment,and safety management,etc.Safety risk probability assessment model was constructed based on the fuzzy comprehensive evaluation,which are divided in five level.The risk matrix method was used to assess risk level of blasting construction,considering blasting construction risk probability and the consequence.Through the case on ChenJiagou tunnel in the province of Hebei proves the feasibility of evaluation method,and the corresponding risk control measurements were proposed.
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Basargin, Andrei A., and Viktor S. Pisarev. "DESIGN OF DRILLING AND EXPLOSION WORKS IN UNDERGROUND MINING USING IN MICROMINE GGIS." Interexpo GEO-Siberia 1, no. 1 (July 8, 2020): 3–14. http://dx.doi.org/10.33764/2618-981x-2020-1-1-3-14.
Повний текст джерелаАнотація:
In the modern world, an increasing number of enterprises involved in geological exploration and exploration use special software and information systems in their work. The use of such systems can significantly accelerate the processing and analysis of information. They make it possible to automate the processing and interpretation of geological exploration data, as well as use them to model deposits and design underground drilling and blasting operations. GGIS Micromine will automate the design of drilling and blasting operations while ensuring well placement taking into account the block geometry and rock properties, and a rational distribution of borehole charges for the most efficient crushing of rock mass. In conditions of high intensity of mining operations at the MGIS quarries, Micromine ensures the efficiency and multivariance of design decisions when performing blasting.
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Dey, Kaushik, and V. M. S. R. Murthy. "Investigations on Impact of Blasting in Tunnels." International Journal of Geotechnical Earthquake Engineering 1, no. 2 (July 2010): 59–71. http://dx.doi.org/10.4018/jgee.2010070105.
Повний текст джерелаАнотація:
Blasting with longer advance per round leaves an impact both visible (in the form of overbreak) and invisible (cracks) in the surrounding rockmass, however, a number of controlled-blasting techniques, that is line drilling, pre-splitting, and smooth blasting, have been developed to minimise this problem. These techniques require additional drilling, controlled charging, and detonation, and thus, are not preferred in regular development activities. Investigations have been carried out in five different horizontal development drivages of metal mines to assess the blasting impact using burn cut and arrive at the blast-induced rock damage (BIRD) model. Vibration monitoring close to the blast was carried out using accelerometers for the first time in India to develop vibration predictors and overbreak threshold levels for individual sites. This paper reports the development of the overbreak predictive model (BIRD) for burn cut blasting in hard rock drivages by combining the relevant rock, blast design, and explosive parameters. A multivariate statistical model has been developed and validated and the same can find ready application in tunnels and mines for exercising suitable engineering controls both in blast design and explosive selection for reduced basting impacts.
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Khokhlov, Sergei, Semen Sokolov, Yurii Vinogradov, and Ilia Frenkel. "Conducting industrial explosions near gas pipelines." Journal of Mining Institute 247 (March 16, 2021): 48–56. http://dx.doi.org/10.31897/pmi.2021.1.6.
Повний текст джерелаАнотація:
The problem to ensure the safety of objects which are in the area of blasting operations, ensuring the destruction of hard rocks, remains relevant. The article presents the results of a large-scale experiment to determine the safe conditions for conducting drilling and blasting operations near the active gas pipeline. The simplest and most reliable way to ensure the safety of the protected object from seismic impact is to reduce the intensity of the seismic wave, which is achieved by changing the parameters of drilling and blasting operations. This requires research to determine the impact of blasting operations on the parameters of seismic waves and the development of methods for measuring these parameters. The paper presents a detailed analysis of the seismic blast wave impact on the displacement of the ground and the model gas pipeline. The features of seismic monitoring during blasting operations near the active gas pipeline are shown. The seismic coefficients and attenuation coefficient of seismic waves are determined. It is proved that the readings of the seismic receivers on the surface and in the depth of the massive differ by two or more times.