Thematische Bibliographien / Rock mass evaluation

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Auswahl der wissenschaftlichen Literatur zum Thema „Rock mass evaluation“

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Veröffentlicht am 25. Mai 2024

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Zeitschriftenartikel zum Thema "Rock mass evaluation"

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Xie, Mowen, Weinan Liu, Yan Du, Qingbo Li und Hongfei Wang. „The Evaluation Method of Rock Mass Stability Based on Natural Frequency“. Advances in Civil Engineering 2021 (24.04.2021): 1–9. http://dx.doi.org/10.1155/2021/6652960.

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The limit equilibrium method’s analysis index cannot be measured by on-site monitoring equipment and cannot be used for monitoring and early warning of rock instability. The existing rock stability evaluation methods based on vibration information cannot evaluate the stability of rocks quantitatively. In this paper, the slope’s constraints on the rock were simplified to springs and a three-dimensional analysis model of rock vibration was established. The equation for calculating the natural frequency of rock that includes the spring stiffness as an indicator was derived. The rock stability calculation function containing the index of natural frequency was brought into the traditional rock stability coefficient calculation equation, and a new rock stability analysis method based on natural frequency was established. The experiment proved the measurability of the index of the natural frequency of rock and the method’s effectiveness for the stability analysis of the rock based on natural frequency.
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Nikolai, Abramkin. „Empirical techniques for assessing rock mass condition“. Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal, Nr. 2 (20.04.2022): 68–76. http://dx.doi.org/10.21440/0536-1028-2022-2-68-76.

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The relevance of the work is due to the existence of a large number of empirical methods for predicting the condition of a rock mass and the need to apply them at the design and operational stage of mining enterprises to minimize costs during construction and future maintenance. Research objective is to analyze and compare existing empirical methods for determining the strength and deformation properties of rock mass. Methods of research include the analysis, systematization and synthesis of existing empirical methods of rock mass condition assessment and their applicability to real-world sites. Recommendations for further application of empirical rock mass assessment methods in real-world conditions are determined by generalization of theory and practice, research results and analytical calculations based on the assessment of fracture formation in rock masses. Results. The main empirical methods such as Deere's method (RQD) of structural failure evaluation, the method relating strain rate to RMR rating system and the method relating strain rate to geomechanical classification of rock mass Q were found and chosen for comparison. Several types of rocks such as limestone, diorite, granite, basalt, tuff, andesite in different geotechnical conditions are chosen for comparison of the methods. Comparison of different empirical methods of rock mass condition assessment is carried out. Evaluations of each method are given. Ways of application of empirical research methods are recommended. It is concluded that it is necessary to apply several methods in order to get a more accurate picture of the rock mass condition. Recommendations for the initial assessment of the state of rocks are given. Conclusions. There are a large number of empirical methods of rock mass condition estimation. The results obtained by some methods for some types of rocks under different mining and geological conditions are very different from each other, this is due to the fact that the considered methods were created on the basis of different sources. It is necessary to take into account the stresses acting in the rock mass, which also influence the results obtained.
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Khurshid, Muhammad Nasir, Ammad Hassan Khan, Zia ur Rehman und Tahir Sultan Chaudhary. „The Evaluation of Rock Mass Characteristics against Seepage for Sustainable Infrastructure Development“. Sustainability 14, Nr. 16 (15.08.2022): 10109. http://dx.doi.org/10.3390/su141610109.

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The determination of rock seepage characteristics is a complex phenomenon due to the variability, discontinuities, and formation age of rocks. The available literature on rock mechanics covers empirical relationships and approaches for the estimation of seepage characteristics from the rock mass parameters. In this study, an area comprising of infrastructure such as a water reservoir, embankments, roads, etc., constructed on mix rock mass formations was selected. The field and laboratory tests’ geo-mechanical data for the study area were evaluated. The data obtained from the field geo-mechanical engineering tests like Rock Quality Designation (RQD), Rock Core Recovery, Lugeon, etc., were analyzed. The data retrieved from the geological and geotechnical laboratory tests such as petrography, uniaxial compression, Hoek shear, elastic modulus, etc., were also evaluated. Rock mass was characterized based on petrographic and RQD, and was found in the hybrid formation of igneous, metamorphic, and sedimentary deposits. Seepage analysis in the study area was also carried out based on adit and piezometric data (installed in accordance with the mining technology guidelines), using Seep W Finite Element Method (FEM). The seepage observed in adits were compared with seepage calculated from Seep W. The trend of simulated flux was also presented against K ratio. Seepage quantities for different ranges of K ratio were plotted to evaluate interdependency between seepage and K ratio. Correlations of RQD were developed with hydraulic conductivity “k” for igneous, metamorphic, and sedimentary rocks for quick assessment of seepage characteristics of rock mass by RQD. These correlations and seepage related evaluations will be beneficial for the characterization of rock mass in relation to seepage for sustainable infrastructure development.
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Mohammed, Fahmy, Ghafor Hamasur und Diary Al-Manimi. „Evaluation of Carbonate and Heterogenous Rock Masses for the Dam Foundation: A Case Study at Kanarwe River Basin, Sulaimaniyah, NE Iraq“. Iraqi Geological Journal 56, Nr. 1F (30.06.2023): 155–83. http://dx.doi.org/10.46717/igj.56.1f.11ms-2023-6-19.

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Evaluating rock masses for dam foundations, especially heterogeneous rock (flysch), becomes imperative and requires accurate geomechanical classifications. The rocks at the Kanarwe river basin, especially at a proposed dam site (Goma-Qazan near Khewata, Sura Qalat villages), mainly consist of interlaying massive carbonate rocks of the Aqra Formation with flysch rocks of Tanjero Formation. Therefore, selecting appropriate dam types is challenging and very risky. This study conducted a detailed study of lithology, discontinuity condition, rock sampling and laboratory tests to determine the site suitable for dam construction using the quantitative GSI, Rock Mass Rating, and Dam Mass Rating geomechanical classification systems. A new procedure was suggested for calculating stress relaxation and damage level (disturbance factor D) in rock masses. The Dam mass rating related to the foundation stability shows a good stability indication ranging from 43.7–82.9, indicating foundation suitability for all dam types. The foundation excavation desirability and consolidation grouting were evaluated based on dry basic rock mass rating, which shows that the site is suitable for earth fill and hardfill dams. However, the rock mass units require spot and systematic grouting for gravity and Arch dams, respectively. Ec/Em (deformation modulus of the dam/deformation modulus of foundation rocks) values for massive carbonate rock range from 0.18–0.93; they indicate site suitability for arch, gravity dam, earth fill and hardfill dams. While the Ec/Em values for flysch rock mass units range from 1–6.4, they indicate some units have a serious problem situation and need treatment based on the types of dams.
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Wu, Shuliang, Xidong Du und Shan Yang. „Rock Mass Quality Evaluation Based on Unascertained Measure and Intuitionistic Fuzzy Sets“. Complexity 2020 (27.04.2020): 1–14. http://dx.doi.org/10.1155/2020/5614581.

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Evaluation of rock mass quality is of great significance to the design and construction of geotechnical engineering. In order to evaluate the quality of engineering rock mass scientifically and deal with the fuzzy information in the rock mass quality evaluation reasonably, a model for evaluation of rock mass quality based on unascertained measure and intuitionistic fuzzy sets (UM-IFS) was proposed. First, the membership of rock mass quality evaluation index was determined by the single index measure function of unascertained measure (UM) theory. Based on the intuitionistic fuzzy sets (IFS) theory, the single index measure evaluation matrix based on IFS (IFS-single index measure evaluation matrix) was obtained. By synthesizing various subjective and objective weighting methods, the range of index weight was determined, and the index weight vector based on IFS (IFS-index weight vector) was constructed. Then, the IFS-single index measure evaluation matrix and the IFS-index weight vector were used to calculate the scores of rock mass samples and evaluate rock mass quality. Finally, fuzzy analysis was performed on the weight of rock mass quality evaluation index. The established model for evaluation of rock mass quality was applied to the underground engineering rock mass in Guangzhou pumped storage power plant, and the evaluation results were compared with the other 4 effective models for rock mass quality evaluation. The results show that rock mass quality evaluation based on UM-IFS is consistent with the actual situation, and the fuzziness of evaluation index weight has no obvious correlation with its value.
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Ismanda, Yayi, I. Gde Budi Indrawan und Heru Hendrayana. „Evaluation of Engineering Geological Conditions for Slope Stability Analysis of Diversion Tunnel Portal of Jlantah Dam, Karanganyar, Central Java“. Journal of Applied Geology 8, Nr. 1 (20.08.2023): 9. http://dx.doi.org/10.22146/jag.72438.

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This paper presents the research results carried out to analyze the slope stability of the diversion tunnel portal of Jlantah Dam based on the quality of the rock mass. The classification of the rock mass quality at the tunnel location refers to the Geological Strength Index (GSI) method while the analysis of portal slope stability is modelled numerically with the element method using Phase2 software. The modelling of the tunnel portal slope design with and without earthquake load was carried out to obtain the safety factor (SF) value. The results showed that the study area consists of residual soil, andesite breccia and lapilli tuff rocks with rock mass quality based on the GSI value ranging from poor to fair. The inlet portal slope is composed of rocks that have poor and fair mass quality while the inlet section is composed of rocks that have poor mass quality. The SF value>1.3 for conditions without earthquake effect was achieved on slope design 1V:1.5H and SF value>1.1 for conditions with earthquake effect was achieved on slope design 1V:2H. The SRF value at the portal outlet location is greater than the SRF value at the portal inlet location for the same slope design conditions indicating that the rock mass quality at the portal outlet location is better than the rock mass quality at the portal inlet location.
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Liu, Wen-lian, Jia-xing Dong, Han-hua Xu, Su-gang Sui, Run-xue Yang und Lun-shun Zhou. „Trajectory Analysis and Risk Evaluation of Dangerous Rock Mass Instability of an Overhang Slope, Southwest of China“. Advances in Civil Engineering 2021 (24.06.2021): 1–15. http://dx.doi.org/10.1155/2021/7153535.

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Analysis of the movement trajectory and risk assessment of the high-slope dangerous rock mass collapse are of great significance for preventing and controlling the geological disasters of collapse. This study firstly takes the dangerous rock mass of the high slope in Pu’erdu Town, Yanjin County, Zhaotong City, Yunnan Province, as the research object, calculates and analyzes the trajectory of collapse movement of several groups of dangerous rock mass with great threat, and RocFall are used to carry out numerical simulation analysis and verification. Secondly, the risk and vulnerability of the dangerous rock mass in the study area are analyzed, and the risk evaluation is carried out through the risk evaluation matrix to clearly define the risk level. Results show that if the dangerous rock mass collapses, the horizontal movement distance was approximately 53–88 m, and the maximum bounce height of the platform was approximately 3–18 m, which will seriously threaten the life and property safety of residents. There is little difference between the simulation of the collapse of dangerous rock mass by RocFall software and the calculation result of the formula. Although RocFall software is more intuitive and can be directly compared with charts, software cannot completely simulate the actual situation, and it is only suggested as a reference from design rather than a basis of design. The result of risk evaluation shows that there are 2 high-risk dangerous rocks, 3 medium-risk dangerous rocks, and 1 low-risk dangerous rock in this area. It is suggested that a reasonable and scientific engineering treatment scheme should be put forward as soon as possible in combination with the collapse trajectory of the collapsing movement.
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Diwani, J. P., und G. I. Marliyani. „Empirical Method for Engineering Geological Evaluation of Pelosika Dam Diversion Tunnel Design, Southeast Sulawesi, Indonesia“. IOP Conference Series: Earth and Environmental Science 1233, Nr. 1 (01.08.2023): 012007. http://dx.doi.org/10.1088/1755-1315/1233/1/012007.

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Abstract This paper explains a Pelosika Dam Diversion Tunnel in metamorphic rocks (quartz muscovite phyllite) and aims to find out excavation methods, stand-up time, and support systems for tunnel construction. The purpose of this research is that the development of science in tunnel construction with the characteristic of metamorphic rock will increase. Tunnel location in poort rock mass quality based on previous geology investigations. Based on current geology and engineering geological mapping results, diversion tunnel through poor rock mass of metamorphic rocks (phyllite) which have slightly-highly weathered. We classified rock mass quality by GSI, RMR, and Q-System methods which produce the almost same results (poor rock mass quality). The GSI Chart and Pettifer-Fookes Chart which excavation method has the results of the digging and ripping. RMR value determines the stand-up time last 42-240 minutes after excavation. RMR and Q-System values generate the support system which used rock bolts (length= 1.8 m), shotcrete (thick=10-15 cm), and steel sets (spacing=1,5m) if required. A purpose of combination from the different excavation methods and support systems to complement each other and improve the safety of the tunnel without compromising the cost-effectiveness of construction.
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Gart, Ibrahim, Ghafor Hamasur und Mohammed Abood. „Assessment of Foundation Rocks of the Proposed Makhol Dam in the Northern Salah- Alddin, Iraq“. Iraqi Geological Journal 56, Nr. 1F (30.06.2023): 135–54. http://dx.doi.org/10.46717/igj.56.1f.10ms-2023-6-18.

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This study was done as an assessment of the foundation rocks of the proposed Makhol dam in the northern Salah- Aiddin Governorate, Iraq. This study consists of field, laboratory, and office work. It was noticed in the field that the thirteen (13) different rock mass units comprised along the dam axis. Three rock mass classification systems were adopted (used) in the evaluation: Rock Mass Rating, Dam Mass Rating, and Geological Strength Index. The DMRSTA (RMR related to dam stability) values for the right bank range between 36.97- 73.8. These values indicate good stability of foundation rocks of the right part with the presence of some instability of primary effect (not serious effect) in unit no.3 (Fatha Formation), and the DMRSTA values of the left bank range between 44.97– 61.7 These values indicate no instability for the foundation rocks on the left bank for all rock mass units. The RMRBD89 values range between 37– 73.3. These values reveal that the foundation rocks are desirable and can be excavated for rockfill and earth fill dams, but for the gravity dam, the rock mass unit 3, must be excavated to the desirable RMRBD89 value in the case of a gravity dam, and indicate that the foundation rocks do not require grouting when the type of dam is earth fill. Some rock mass units require grouting (spot grouting), especially for the rock mass unit 3 when the type of dam is Rockfill, and require systematic grouting, especially when the type of dam is Gravity. The Roc Lab software was used for the purpose of determining the mechanical properties of all rock units through the Hook-Brown failure criterion.
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Zhang, Qi, Qing Jiang, Yuanhai Li, Ning Wang und Lei He. „Quality Evaluation of Rock Mass Using RMR14 Based on Multi-Source Data Fusion“. Sensors 21, Nr. 21 (26.10.2021): 7108. http://dx.doi.org/10.3390/s21217108.

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The uncertainties in quality evaluations of rock mass are embedded in the underlying multi-source data composed by a variety of testing methods and some specialized sensors. To mitigate this issue, a proper method of data-driven computing for quality evaluation of rock mass based on the theory of multi-source data fusion is required. As the theory of multi-source data fusion, Dempster–Shafer (D-S) evidence theory is applied to the quality evaluation of rock mass. As the correlation between different rock mass indices is too large to be ignored, belief reinforcement and Murphy’s average belief theory are introduced to process the multi-source data of rock mass. The proposed method is designed based on RMR14, one of the most widely used quality-evaluating methods for rock mass in the world. To validate the proposed method, the data of rock mass is generated randomly to realize the data fusion based on the proposed method and the conventional D-S theory. The fusion results based on these two methods are compared. The result of the comparison shows the proposed method amplifies the distance between the possibilities at different ratings from 0.0666 to 0.5882, which makes the exact decision more accurate than the other. A case study is carried out in Daxiagu tunnel in China to prove the practical value of the proposed method. The result shows the rock mass rating of the studied section of the tunnel is in level III with the maximum possibility of 0.9838, which agrees with the geological survey report.
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Dissertationen zum Thema "Rock mass evaluation"

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Edelbro, Catrin. „Evaluation of rock mass strength criteria“. Licentiate thesis, Luleå, 2004. http://epubl.luth.se/1402-1757/2004/72.

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Eksi, M. „Rock mass characterisation for stability evaluation of room and pillar mine workings“. Thesis, University of Nottingham, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381206.

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Chester, Christopher James. „The evaluation of novel remote techniques for the detection of rock mass failure“. Thesis, University of Exeter, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.438734.

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Ismail, Mohd Ashraf bin Mohamad. „Study on hydrogeological modeling and evaluation of groundwater behaviors in fractured rock mass“. 京都大学 (Kyoto University), 2010. http://hdl.handle.net/2433/120805.

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Poluga, Sara Lindsay. „Rock Mass Characterization and Stability Evaluation of Mount Rushmore National Memorial, Keystone, South Dakota“. Kent State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=kent1498239487032982.

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Chang, Chuan Sheng. „Development of Hydrogeological Modelling Method and Evaluation of Hydraulic Behaviors in Fractured Rock Mass“. 京都大学 (Kyoto University), 2009. http://hdl.handle.net/2433/124510.

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Bryan-Jones, Alistair. „Evaluation of rock mass behaviour using borehole microseismic monitoring : an application to longwall coal mining“. Thesis, University of Liverpool, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366358.

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Clark, Philip B. „Rock mass and rippability evaluation for a proposed open pit mine at Globe-Progress, near Reefton“. Thesis, University of Canterbury. Geology, 1996. http://hdl.handle.net/10092/9361.

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Rock mass classification schemes such as the Q System and Rock Mass Rating (RMR) System have been designed for prediction of tunnel support, but these systems can be modified from stability analyses to excavatability assessments. Five methods have been used to classify the rock mass at Globe-Progress with the objective of predicting the type of equipment that may be used to excavate the open pit: • Seismic velocity determination • Size-Strength Method • RMRSystem • Weaver's (1975) Rippability Rating System • MacGregor et al's (1994) Productivity Prediction Method Seismic velocity determination and the Size-Strength Method are both easily performed during the feasibility stages of a project. Seismic velocities are influenced by the degree of fracturing, compaction, porosity, density and weathering, and they can therefore be used to provide a preliminary characterisation of the rock mass. The Size-Strength Method uses the two most important properties of a rock mass for classification, the discontinuity spacing and the strength of the rock material. Both methods, therefore, provide quick and accurate assessments of the rock mass quality. At the investigation or design stage of a project a complete rock mass characterisation method is used that involves a collection of geological and geotechnical parameters to fully characterise the rock mass. The method chosen for use at Globe-Progress was the RMR system, as this method is easily adapted from a stability prediction method to an excavatability prediction method. Most data required for calculation of the RMR Index is available from drillcore data logs. Simple analyses of drillcore log data show that drillcore data has been correctly logged except for the strength parameter. This was revised for every logged rock mass unit (RMU) based on quantitative strength determinations and the lithology of each RMU, so that more accurate excavatability analyses could be made using the RMR System, a modified version of Weaver's 1975 Rippability Rating Method, and MacGregor et al’s 1994 Productivity Prediction Method. The ratings for the three rock mass classification methods employed have been contoured on plans at 20 metre bench levels. The plans show that zones of poor rock, where digging to easy ripping should be expected, exist in the western pit wall, where the Chemist Shop Fault is located, and along the northern and eastern walls, following the Globe-Progress Shear Zone. Most of the overburden is classed as fair to poor rock, where easy to moderate ripping will be expected, and there is a zone of weaker rock in the axial fold of the Globe-Progress Shear Zone. This study indicates that the proposed open pit is geotechnically feasible to rip. The preliminary assessments suggest that 90% of the pit area is rippable or marginal and 10% is expected to non-rippable. The final assessments suggest that ripping will be very easy (>3500m³/hr) to difficult (250 - 750 m³/hr) using a Komatsu D575A-2 Bulldozer. Some areas of overburden may require blasting to further fragment the rock mass and aid productivity. But there are other factors, such as the bulldozer operator's experience in ripping similar rock masses, wear and tear on ripper blades, bulldozer maintenance time and transportation costs, and other restrictions that influence overall productivity and costs associated with ripping, and which cannot be determined until ripping actually proceeds.
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Elkarmoty, Mohamed Mohy Mohamed Saad <1987&gt. „Rock Mass Fracture Detection and Modelling Using GPR for Evaluation and Production Optimization of Ornamental Stone Deposits“. Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amsdottorato.unibo.it/8370/1/Thesis_Mohamed%20Elkarmoty_PhD%20UNIBO.pdf.

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The thesis presents new solutions for the fractures problem in ornamental stone quarries which entails economic and material loses. The thesis aimed at developing methodologies and providing solutions for evaluation and production optimization of ornamental stone deposits. Ground Penetrating Radar (GPR) was selected, among several methods, as a fracture detection tool for this research. A combination of the use of a low frequency GPR antenna and laboratory rock tests for evaluation of an ornamental stone deposit showed encouraging results. Based on GPR survey, particularly high frequency antennas, a 3D deterministic fracture modeling approach was developed and implemented in several case studies of block and bench scales. A fracture index was proposed for deposit evaluation based on fracture detections from GPR survey. Additionally, an in-situ GPR test allowed formulating a propagation velocity model for 3D mapping of the dielectric constant of the medium, within macro and micro scale of the rock mass of a bench in a sandstone quarry. This finding is significant for future improvement of the deterministic accuracy level of the developed fracture modeling approach and, generally, for the GPR applications in rock mass. Regarding quarrying optimization, two 3D algorithms, based on fracture modeling or mapping, were developed for production and/or revenue optimization of cutting slabs from blocks and cutting blocks from benches. The algorithms were coded in two software packages named SlabCutOpt and BlockCutOpt. SlabCutOpt was applied to a case study of a limestone block through testing 37 different commercial-sizes of slabs, investigating the optimization results in terms of recovery ratio (a geo-environmental direction) and revenue (an economic direction). BlockCutOpt was applied to two case studies (quarries) with different site characteristics. The results showed that optimum cutting direction of blocks can vertically and horizontally vary, giving geometric information about the cutting grid of blocks that optimizes the production.
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Tranel, Lisa Marie. „Evaluation of Coupled Erosional Processes and Landscape Evolution in the Teton Range, Wyoming“. Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/38693.

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The evolution of mountain landscapes is controlled by complex interactions between large-scale tectonic, surficial and climate conditions. Dominant processes are attributed to creating characteristic features of the landscape, but topographic features are the cumulative result of coupled surficial processes, each locally effective in a different climate or elevation regime. The focus of erosion by glacial, fluvial, or mass wasting processes is highly sensitive to small changes in boundary conditions, therefore spatial and temporal variability can be high when observed over short time scales. This work evaluated methods for dissecting the history of complex alpine landscapes to understand the role of individual processes influenced by changing climate and underlying bedrock. It also investigated how individual and combined mechanisms of surficial processes influenced the evolution of topography in the Teton Range in Wyoming. Detrital apatite (U-Th)/He thermochronology and cosmogenic radionuclide erosion rates were applied to determine spatial and temporal variability of erosion in the central catchments of the range. Spatial variability existed between the glacial and fluvial systems, indicating that sediment erosion and deposition by these processes was controlled by short-term variability in climate conditions. Effective glacial incision also controlled other processes, specifically enhancing rock fall activity and inhibiting fluvial incision. Short-term erosion rates were highly variable and were controlled by stochastic processes, particularly hillslope failures in response to slope oversteepening due to glacial incision and orientation and spacing of bedrock fractures. Erosion rates averaged over 10 ky time scales were comparable to long-term exhumation rates measured in the Teton Range. The similarity of spatial erosion patterns to predicted uniform erosion and the balance between intermediate and long-term erosion rates suggests the landscape of the Teton Range is approaching steady-state, but frequent stochastic processes, short-term erosional variability and coupled processes maintain rugged topographic relief.
Ph. D.
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Buchteile zum Thema "Rock mass evaluation"

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Choi, Jun Su, Hee Hwan Ryu, In Mo Lee und Gye Chun Cho. „Rock Mass Classification Using Electrical Resistivity - an Analytical Study“. In Advanced Nondestructive Evaluation I, 1411–14. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-412-x.1411.

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Pereira, Marcelo, Isabel Fernandes, Rui Moura und Nadir Plasencia. „Drilling Parameters in the Evaluation of Rock Mass Quality“. In Advances in Geoengineering, Geotechnologies, and Geoenvironment for Earth Systems and Sustainable Georesources Management, 193–96. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-25986-9_32.

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Cha, Min Su, Young Jong Sim, Gye Chun Cho und Sung Won Lee. „The Effect of Joint Conditions on the Longitudinal and Flexural Wave Velocities of a Rock Mass“. In Advanced Nondestructive Evaluation I, 306–9. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-412-x.306.

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Xie, Xiaokun, Jianchun Li* und Yanlong Zheng. „Modification of Hoek-Brown criterion and evaluation of rock mass quality in tunnel vibration damaged area“. In Rock Dynamics: Progress and Prospect, Volume 1, 197–201. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003359142-30.

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Srivastava, Lok Priya. „Probabilistic Analysis of Borehole Data for Evaluation of Engineering Properties of Rock Mass“. In Lecture Notes in Civil Engineering, 503–10. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6086-6_41.

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Superchi, Laura, Luca Zorzi, Fabio Ferri, Rinaldo Genevois und Maria Lafelice. „A Geomechanical Evaluation of the Rock Mass Involved in the 1963 Vajont Landslide (NE Italy)“. In Landslide Science and Practice, 113–16. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-31319-6_16.

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Ghosh, Rajib, Håkan Schunnesson und Uday Kumar. „Evaluation of Rock Mass Characteristics Using Measurement While Drilling in Boliden Minerals Aitik Copper Mine, Sweden“. In Mine Planning and Equipment Selection, 81–91. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-02678-7_9.

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Li, Junman, Yaan Hu, Xin Wang, Mingjun Diao und Mingjun Diao. „Study on the Operation Safety Evaluation System of Ship Lock Combined with Variation Coefficient Method and Matter-Element Extension Method“. In Lecture Notes in Civil Engineering, 656–67. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6138-0_57.

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AbstractShip lock is the most widely used, the most promising and the most important type of navigation structure in the world at present. It is extremely necessary to evaluate the operation safety of ship lock in service, which has great social and economic benefits. The construction of safety evaluation system is the key step of safety evaluation of ship lock operation. Based on this, this paper systematically studies the evaluation system of ship lock operation safety, including indicator system, weighting method and evaluation model. The main work and conclusions are as follows: Firstly, a multi-indicator hierarchical indicator system including five first-class indicators and forty-seven second-class indicators for the safety evaluation of ship lock operation is established, and four safety evaluation grades of normal, deterioration, early warning and shutdown are divided. Secondly, the process and model of ship lock operation safety evaluation based on extension theory are put forward. Finally, the evaluation result shows that operation safety grade of ship lock belongs to the first grade – normal state, it is consistent with actual situation, indicating that the evaluation system is reliable. At the same time, the method can also be applied to other fields such as dam health evaluation, dam aging evaluation and rock mass quality evaluation, which provides a basis for safety evaluation.
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Bernat Gazibara, Sanja, Marko Sinčić, Mauro Rossi, Paola Reichenbach, Martin Krkač, Hrvoje Lukačić, Petra Jagodnik, Gabrijela Šarić und Snježana Mihalić Arbanas. „Application of LAND-SUITE for Landslide Susceptibility Modelling Using Different Mapping Units: A Case Study in Croatia“. In Progress in Landslide Research and Technology, 343–54. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-44296-4_19.

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AbstractLAND-SUITE software was applied to local-scale landslide susceptibility zonation in a study area (20 km2) located in NW Croatia, which is characterised by small and shallow landslides in engineering soils and hard soils-soft rocks. Landslide susceptibility models were prepared using a LiDAR-based landslide inventory, and causal factors derived and/or modified using high-resolution remote sensing data. The landslide susceptibility analysis was carried out using different statistical methods and mapping units. As a result, we obtained ten susceptibility maps, classified into five zones based on modelled landslide probability. The main objective of this paper is to analyse the use of LAND-SUITE for deriving susceptibility zonations, useful to support applications in a spatial planning system on a local scale. One of the most valuable advantage of LAND-SUITE is that the selection of the appropriate causal factor maps can be performed using simple decisions based on multiple analyses, including multicollinearity tables and correlograms. The evaluation of the susceptibility models allowed to conclude that the pixel-based map represents the best option for application in a local-level spatial planning system, although it requires “post-processing” of the susceptibility zones to produce clustered and homogeneous information. LAND-SUITE has proven to be a valuable tool for testing numerous landslide susceptibility hypotheses.
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Van Duong, Binh, Igor K. Fomenko und Kien Trung Nguyen. „Fractal-Based Evaluation of the Spatial Relationship Between Conditioning Factors and the Distribution of Landslides (a Case Study in Tinh Tuc, Cao Bang Province, Vietnam)“. In Progress in Landslide Research and Technology, 259–68. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-44296-4_13.

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AbstractThis paper presents the assessment results of the spatial relationship between past landslides and four landslide factors in Tinh Tuc town, Cao Bang province, Vietnam, including distance to roads, distance to faults, distance to drainage, and distance to geological boundaries. The fractal dimension values were determined using fractal analyses on three sets of raw data, including the number of landslides, landslide density, and landslide relative density. Using a combination of the frequency ratio (FR) method and the fractal method, landslide susceptibility maps were produced to determine which raw data set more properly analyzes the role of factors in the development of the landslide process. Assessment results using the receiver operating characteristic (ROC) method indicate that the fractal analysis of the raw data sets successfully determines the spatial relationship between conditioning factors and landslides in the study area. In addition, relationship analyses using datasets based on landslide density provide more optimal outcomes. The authors also suggest integrating the fractal method with other quantitative assessment methods to improve the accuracy of landslide prediction in Vietnam and worldwide.
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Konferenzberichte zum Thema "Rock mass evaluation"

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Jinguo Wang und Zhifang Zhou. „Impermeability quality evaluation of rock mass“. In 2011 Second International Conference on Mechanic Automation and Control Engineering (MACE). IEEE, 2011. http://dx.doi.org/10.1109/mace.2011.5988364.

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Bertalot, D., G. Malgesini und E. J. Parker. „Evaluation of Rock Mass Stability and Rock Fall Hazard for Pipelines in Submarine Environments“. In Offshore Technology Conference. Offshore Technology Conference, 2018. http://dx.doi.org/10.4043/28850-ms.

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Yan, Dongxu, Weiya Xu, Wei Wang, Chong Shi, Anchi Shi und Guanye Wu. „Research on quality evaluation method of columnar jointed rock mass“. In 2011 International Conference on Electric Technology and Civil Engineering (ICETCE). IEEE, 2011. http://dx.doi.org/10.1109/icetce.2011.5774576.

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Kang, Zhiqiang, Chunhua Hou und Yanbo Zhang. „Theoretical Evaluation: Extenics of Rock Mass Quality in Subterranean Tunnel“. In GeoHunan International Conference 2011. Reston, VA: American Society of Civil Engineers, 2011. http://dx.doi.org/10.1061/47631(410)28.

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Wu, P. K. K., J. Chin, R. Tsui und C. Ng. „Evaluation of Digital Rock Mass Discontinuity Mapping Techniques for Applications in Tunnels“. In The HKIE Geotechnical Division 42nd Annual Seminar. AIJR Publisher, 2022. http://dx.doi.org/10.21467/proceedings.133.38.

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High-quality coloured 3D point clouds can now be readily generated by digital surveying techniques such as structure from motion (SfM) photogrammetry and terrestrial laser scanning (TLS). Point clouds allow discontinuities to be mapped digitally on rock slopes and this has been widely studied in Hong Kong. In comparison, few similar applications have been reported in tunnels in Hong Kong. To extend the application of this technology for tunnel excavation, we carried out three site trials in two drill-and-blast hard rock tunnels in Hong Kong. Both SfM photogrammetry and TLS were used to generate point clouds for the exposed rock tunnel surfaces. The generated point clouds were then tested for semi-automatic extraction of rock mass discontinuities using DRM2.0, Aurecon’s in-house developed software. This paper provides detail accounts of data acquisition, data processing, present the findings on the performance of semi-automatic identification of discontinuities, and the comparison between SfM and TLS techniques. The paper also discusses the challenges in digital mapping inside tunnels and provide useful suggestions on conducting laser scanning and photogrammetry in tunnels.
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Malda, Octavika, I. Gde Budi Indrawan und Akmaluddin. „Rock Mass Classifications of Flysch Deposits for Analyses of Tunnel Behaviour and Support System-A Case Study of Design Evaluation of Tunnel 6 of Jakarta-Bandung High-Speed Railway“. In The 2nd International Conference on Technology for Sustainable Development. Switzerland: Trans Tech Publications Ltd, 2022. http://dx.doi.org/10.4028/p-h979jd.

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Tunnel 6 of the Jakarta-Bandung high-speed railway is the longest mountain tunnel in Indonesia. This study aimed to evaluate the behaviour of rock masses surrounding the tunnel and support system by conducting surface and subsurface engineering geological investigations. The rock masses at the tunnel construction area were classified based on the Rock Quality Designation (RQD), Rock Mass Rating (RMR), Tunnelling Quality Index (Q), and Geological Strength Index (GSI) systems. The surface and subsurface investigation results show that the tunnel construction area consists of Quaternary volcanic rocks overlying Tertiary sedimentary rocks of the Jatiluhur Formation. The sedimentary rocks have characteristics similar to flysch deposits and are classified as poor to good quality rock masses. The regional tectonic setting had likely worsened the rock mass conditions. Down to a 10 m depth, the rock mass quality is controlled by the RQD value, which correlates with the grain size distribution of the rock masses. The rock masses surrounding the tunnel are anticipated to have an anisotropic behaviour and wedge and chimney failure mechanisms. Consequently, a combination of reinforced shotcrete and bolting is recommended for a conservative empirical design of the tunnel support system.
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Nie, W., Z. Zhao und S. Ma. „Numerical evaluation of rockbolt reinforcement unit in jointed rock mass by DDA method“. In The 2016 Isrm International Symposium, Eurock 2016. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2016. http://dx.doi.org/10.1201/9781315388502-83.

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Aydan, Ö., und N. Tokashiki. „The evaluation of stability of overhanging Ryukyu limestone cliffs utilizing rock mass characteristics inferred from RMQR and intact rock“. In The 2016 Isrm International Symposium, Eurock 2016. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2016. http://dx.doi.org/10.1201/9781315388502-104.

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Huang, Jihui, Caichu Xia, Changling Han und Shiwei Shen. „Study on the Classification and Evaluation Method of the Frost Susceptibility of Rock Mass“. In International Symposium on Systematic Approaches to Environmental Sustainability in Transportation. Reston, VA: American Society of Civil Engineers, 2015. http://dx.doi.org/10.1061/9780784479278.004.

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Vučemilović, Hrvoje. „Corrected Rock Fracture Parameters Applied to Qatari Rock Masses“. In The 2nd International Conference on Civil Infrastructure and Construction. Qatar University Press, 2023. http://dx.doi.org/10.29117/cic.2023.0064.

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This paper is the continuation of the author's previous publications and an attempt to shed light on some of the presented propositions, therein. In his previous work, the author introduced a novel parameter for borehole rock mass evaluation, the FIC, (Fracture Index Corrected) and applied it to Qatari rock masses along with RQDC (Rock Quality Designation Corrected). This was the first case of such wide scale application of these borehole evaluation parameters. A short history is given on alternative proposals by several authors for improvements and amendments of RQD (Rock Quality Designation) since its proposal in 1963, with their authors' commentaries. Scale considerations are presented for both parameters, which are an essential consideration factor for any borehole parameter. The paper is concluded with remarks on assumed advantages and limitations of the two parameters and their future research and usage prospects. The paper is concluded with statements that Qatari rock masses are of unique type, which has not been sufficiently researched or classified by the leading world scientists in this field.
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Berichte der Organisationen zum Thema "Rock mass evaluation"

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Benn, D., R. Linnen und T. Martins. Evaluating white mica as an indicator mineral for lithium bearing pegmatites, Wekusko Lake pegmatite field, Manitoba, Canada. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/328982.

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This project investigates the potential use of white micas as an indicator mineral within Li-bearing pegmatites and the potential of field portable techniques, such as Raman spectroscopy and Laser Induced Breakdown Spectroscopy (LIBS) as real-time techniques in exploration. The pegmatites in the Wekusko Lake field, Manitoba, Canada, display five zones of varying mineralization. White micas display two textures in the field (primary igneous and secondary) and four textures were identified by backscattered electron imaging (poor zonation, rimmed, patchy and exsolution). The white micas were analysed by Electron Probe Micro-Analysis (EPMA) and Laser Ablation Induction-Coupled Plasma Mass Spectroscopy (LA-ICP-MS) and the results show a strong correlation in the Li content of the white mica and the whole rock Li2O obtained from the assays of drill core. The K/Rb vs. Cs contents of the white mica indicate that the most prospective dikes contain moderate to highly evolved grains. The use of portable Raman Spectrometer, while useful for mineral identification, was not able to detect a significant Li signature at the concentrations tested (1500-6000 ppm).
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