Journal articles: 'Rock mechanics'

1

Wu, Si Yu, Bo Huang, and Rui Jun Liu. "Study about Mechanic Parameter of Slope Rock Mass' Structure Plane." Applied Mechanics and Materials 368-370 (August 2013): 1551–55. http://dx.doi.org/10.4028/www.scientific.net/amm.368-370.1551.

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Firstly, the stability of the slope need to determine mechanical parameters of slope rock mass such as deformation modulus, Poissons ratio, cohesion and internal friction angle, etc. For intact rocks, the mechanical parameters mentioned before are easy to determined. While the stability of slope rock mass is controlled by the deformation and intensity. Therefore, how to determine the mechanical parameters of the structure is the key to analyze the stability of slope rock mass. This paper intends to set the slope rock mass below some extra-large bridge as the research object and use numerical calculation to determine the mechanics parameters of rock mass structure plane on the basis of rock sample mechanics test results.

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Feng, Fan, Zhiwei Xie, Tianxi Xue, Eryu Wang, Ruifeng Huang, Xuelong Li, and Shixian Gao. "Application of a Combined FEM/DEM Approach for Teaching a Deep Rock Mass Mechanics Course." Sustainability 15, no. 2 (January 4, 2023): 937. http://dx.doi.org/10.3390/su15020937.

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Deep rock mass mechanics is a professional course which is offered to undergraduate and postgraduate students in some mining universities. This course mainly includes the following topics: the geological structure of deep rock mass, the mechanical properties of deep rocks, the strength theory of deep rock masses, stability analysis and control of deep surrounding rock classification of engineering rock masses, and the application of deep rock mechanics in underground mining engineering The purpose of this course is to present students with a basic theoretical knowledge of deep rock mass engineering. Analyzing the limitations of traditional deep rock mass mechanics teaching methods, here, we propose integrating a combined FEM/DEM (Finite Element Method/Discrete Element Method) approach into the teaching of a course on deep rock mass mechanics. The mechanical behaviors and failure instability process of rock at laboratory and engineering scales were analyzed using ELFEN software (a finite/discrete element code). The results show that a combined FEM/DEM approach as a deep rock mass mechanics teaching method is completely feasible and reasonable; this approach has the advantages of strong intuition, high reliability, time and labor savings, and low cost, which can offset the shortcomings of traditional teaching methods. Moreover, the proposed approach can stimulate students’ interests in a mining course on deep rock mass mechanics, deepen students’ understanding of the course curriculum, and cultivate students’ innovative abilities and subjective initiatives.

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3

He, Hai Ying. "Mechanism and Calculation Research on Excavation Deformation of High Layered Dip Rocky Slope." Advanced Materials Research 455-456 (January 2012): 1596–600. http://dx.doi.org/10.4028/www.scientific.net/amr.455-456.1596.

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Based on rock Mechanical theory under unloading, according to the analysis of rock mechanics state of pre and post excavation of the layered dip rocky slope, it was found that excavation unloading cause deterioration of rock constitutive relation and structure plane’s mechanical parameters, deformation mechanism of high layered dip rocky slope was analyses when rock is at unloading condition in this study. Its deformation consists of the two parts which are rock mass unloading rock mass springback displacement and bedding-slip displacement along the rock mass discontinuity, and deduced the calculating formula of slope displacement. Research results with great guide significance and practical engineering value to similar engineering construction afterward.

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Voloshyn, Oleksii, and Oleh Riabtsev. "Some important aspects of rock mechanics and geomechanics." E3S Web of Conferences 109 (2019): 00114. http://dx.doi.org/10.1051/e3sconf/201910900114.

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This work considers the analysis of important aspects of rock mechanics, such as the variability of the mechanical properties of rocks under the samples testing, the continuity of the rock mass and the deformation beyond the elastic limit, which have a great influence on the accuracy and reliability when conducting geomechanical studies of the rock mass during coal mining. The main methods for solving geomechanical problems are shown.

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5

Zhao, Kang, Shuijie Gu, Yajing Yan, Qiang Li, Wanqi Xiao, and Guoqing Liu. "Rock Mechanics Characteristics Test and Optimization of High-Efficiency Mining in Dajishan Tungsten Mine." Geofluids 2018 (August 13, 2018): 1–11. http://dx.doi.org/10.1155/2018/8036540.

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Rock mechanics test is not only the basis for obtaining the mechanical parameters of rock but also an important means for studying rock mechanics and engineering. In this paper, the uniaxial compression deformation test, Brazilian splitting test, and cornea pressure shear test are carried out for rocks in the Dajishan tungsten mine. The basic mechanical parameters such as uniaxial compressive strength, tensile strength, elastic modulus, Poisson’s ratio, and internal friction angle of ore rock and surrounding rock are obtained. Meanwhile, damage characteristics of rock are deeply studied and analyzed under different experimental conditions. According to rock mechanics parameters which are obtained from indoor rock mechanics tests, three design schemes of stope structure parameters are optimized by using the FLAC3D numerical simulation software. On the premise of ensuring the stability of the stope structure, the recovery rate of ore and the production capacity of the stope are taken into consideration. It is suggested that the second scheme should be adopted for mines (18 m for ore room and 7 m for ore pillar), which provides scientific guidance for the safe and efficient mining of mines.

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JOHNSTON, I. W., and E. A. NOVELLO. "SOIL MECHANICS, ROCK MECHANICS AND SOFT ROCK TECHNOLOGY." Proceedings of the Institution of Civil Engineers - Geotechnical Engineering 107, no. 1 (January 1994): 3–9. http://dx.doi.org/10.1680/igeng.1994.25715.

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Hu, Xuelong, Ming Zhang, Xiangyang Zhang, Min Tu, Zhiqiang Yin, Haifeng Ma, and Minke Duan. "A Coupled Elastoplastic Damage Dynamic Model for Rock." Shock and Vibration 2021 (October 4, 2021): 1–10. http://dx.doi.org/10.1155/2021/5567019.

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Rock dynamic constitutive model plays an important role in understanding dynamic response and addressing rock dynamic problems. Based on elastoplastic mechanics and damage mechanics, a dynamic constitutive model of rock coupled with elastoplastic damage is established. In this model, unified strength theory is taken as the yield criterion; to reflect the different damage evolution law of rocks under tension and pressure conditions, the effective plastic strain and volumetric plastic strain are used to represent the compressive damage variable and the equivalent plastic strain is used to represent the tensile damage variable; the plastic hardening behavior and strain rate effect of rocks are characterized by piecewise function and dynamic increase factor function, respectively; Fortran language and LS-DYNA User-Defined Interface (Umat) are used to numerically implement the constitutive model; the constitutive model is verified by three classical examples of rock uniaxial and triaxial compression tests, rock uniaxial tensile test, and rock ballistic test. The results show that the constitutive model can describe the dynamic and static mechanical behavior of rock comprehensively.

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8

Li, Hai Gang, Zhi Jun Yang, and Tong Lin Han. "Study on the Rockmass Instability of Open-Pit Mine by Block Theory and Numerical Simulation Methods." Applied Mechanics and Materials 353-356 (August 2013): 1077–81. http://dx.doi.org/10.4028/www.scientific.net/amm.353-356.1077.

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On the background of rock masses and field engineering geology of a mine, the feature of rock mechanics and rock mass structure of surrounding rock at mining district are analyzed. Based on the finite difference theory and block theory, FLAC3D program (Fast Lagrangian Analysis for Continuum), rock mechanic and rock mass structure results are used to construct the finite difference mechanical model, which reflected the surrounding rock stability when mining. By the numerical simulation, the mechanical effect is studied by the process of mining and its results can be used to produce some theory and actual basis.

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9

Zhang, Qiu Mei, Jin Tao Tang, and Hao Ma. "Analysis between Water Contain and Lithology." Applied Mechanics and Materials 744-746 (March 2015): 422–25. http://dx.doi.org/10.4028/www.scientific.net/amm.744-746.422.

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Water content has a great influence on the rock mechanics properties. Four kinds of rock samples have been tested in the MTS Electro hydraulic Tri-axial Servo Test System. The result shows that with the increase of water content, the rock uniaxial compressive strength and elastic modulus value are declining. We get the fitting equation between water content and rock mechanical properties with four kind of rocks, provide a new basis for slope stability analysis and landslide prevention and control measures.

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10

Ye, Yu, Li Li, and Xunjian Xu. "Physical and Mechanical Properties of Transmission Line Galloping under the Action of Freezing and Thawing in Variable Temperature Range." Advances in Civil Engineering 2021 (September 4, 2021): 1–10. http://dx.doi.org/10.1155/2021/8368289.

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The western part of our country is mostly alpine regions. The rock and soil have been in a strong natural freeze-thaw environment for a long time, and their physical and mechanical properties are easily affected by external loads and external surroundings. Changes due to the influence of the environment will inevitably produce freeze-thaw cycles, damage and destruction, expansion and fracture, etc., resulting in more stable factors than usual. However, there is a lack of theoretical and practical experience in freeze-thaw rocks, especially freeze-thaw hard rocks. Therefore, studying the physical and mechanical properties and damage characteristics of rocks in alpine regions under freeze-thaw cycles has important significance. This paper uses dacite in the alpine region to carry out a freeze-thaw cycle experiment in a variable temperature range. Freezing and thawing cycle test, uniaxial compression test, triaxial compression test, and electron microscope scanning of the rock in the indoor saturated state were carried out. Combining theory with experimental mechanics, freeze-thaw mechanics, and damage mechanics, we studied freeze-thaw cycle in three variable temperature ranges (−20°C–15°C; −30°C–15°C; −40°C–15°C), along with the physical and mechanical properties and damage characteristics of freeze-thaw dacite in the alpine region under cycling. The damage curve of the final theoretical model gradually approaches 1.0 with the increase of strain during the actual test. The rock sample after the medium failure still has a certain bearing capacity, and the rock sample is often destroyed before it reaches the theoretical failure strain.

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11

Feng, Zhi Ren. "Simulation Study on Seismic Response of Different Rock Structures." Applied Mechanics and Materials 568-570 (June 2014): 1766–69. http://dx.doi.org/10.4028/www.scientific.net/amm.568-570.1766.

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Seismic rock study aims to clarify the relationship between the rock and the intrinsic nature of seismic attributes contained in the fluid between the paper based on the physical characteristics of the rock, viscoelasticity and anisotropy of systems theory and media rock mechanics model response characteristics, and model simulation, simulation results show that the physical structure of the rocks we build the model can well reflect the characteristics of the seismic response of rock mechanics.

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12

Rasolofosaon, Patrick N. "Unified phenomenological model for the mechanical behavior of rocks." GEOPHYSICS 74, no. 5 (September 2009): WB107—WB116. http://dx.doi.org/10.1190/1.3169505.

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Various types of experiments are used to interrogate the mechanical behavior of rocks. The whole experimental spectrum covers many orders of magnitude in frequency (roughly ten orders of magnitude) and in strain (approximately eight orders of magnitude). These experimental studies have established unambiguously a certain number of robust results, namely, frequency dependence, dependence on stress-strain level (nonlinearity), eventually the presence of hysteresis (stress is not an analytic function of strain), and dependence on the direction of observation (anisotropy). These four behaviors are synthesized in a single model. The model allows direct comparison of the magnitude of the different phenomena (dispersion, nonlinearity, anisotropy) and their combinations in rocks. The frequency dependence of the mechanical properties should not be neglected, but another fundamental parameter, namely, the strain level, is important to explain the mismatch between the “static moduli,” measured with a press in rock mechanics, and the “dynamic moduli,” measured with ultrasonic devices in rock physics, which commonly is not appreciated. Such a unified model helps to make the link between different communities (e.g., rock physics, seismology, applied seismics, and rock mechanics) by using the same mathematical tool, and it could contribute to mutual fertilization among these communities.

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13

Tian, Yong, and Hai Lin. "Application of Rock Mechanics Parameters to Obtain Formation Pressure." Applied Mechanics and Materials 239-240 (December 2012): 803–6. http://dx.doi.org/10.4028/www.scientific.net/amm.239-240.803.

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Using triaxial tests of rock mechanics on stress testing instrument to analyze the results of its parameters, and obstained the the region that was consistent with the transformation between static and dynamic rock mechanics, the relationship between formation pore pressure and rock mechanical parameters, the pressure profile in the basis of rock mechanics parameters, etc. Combination of logging information and data, the method was identified which was in line with the use of rock mechanics parameters to strike a formation pressure. Using this method, I have analysised the formation pressure profiles of several wells in a block, and established the corresponding formation pressure detection section and the section of rock mechanics. The tested pressure and the measured pressure were compared more than 85% accuracy.

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14

Sun, Ying Xue, Song Chen, and Shuai Ran Cheng. "Stability Analysis of Unloading Slope by Interface Element Method." Applied Mechanics and Materials 226-228 (November 2012): 1462–66. http://dx.doi.org/10.4028/www.scientific.net/amm.226-228.1462.

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Mechanics behavior of unloading rock slope is essentially different from the natural rock slope . But, stability analysis of rocky slope during and after excavating still need these parameters and constitutional relation came from the natural rock slope, thus, the difference between the unloading rock mass and natural rock mass is neglected. The calculation result is quite different from the monitoring result. In order to analyze the stability of unloading rock slope properly, corresponding mechanics parameters including mechanics state, unloading degree and others should be determined and applied. In this paper, IEM - Sample Element Method and Interface Element Method expounded systematically and used to determine the corresponding mechanics parameters of a layered rock slope- Xishan slope of the Jiangyin Yangtze River Bridge. Then, IEM computer program based on Interface Element Method used to calculate the displacement of Xishan slope. Compare with displacement site-monitoring results, IEM is better than Finite Element Method.

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15

Zhu, Changxing, Hongbo Zhao, and Zhongliang Ru. "LSSVM-Based Rock Failure Criterion and Its Application in Numerical Simulation." Mathematical Problems in Engineering 2015 (2015): 1–13. http://dx.doi.org/10.1155/2015/246068.

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A rock failure criterion is very important for the prediction of the failure of rocks or rock masses in rock mechanics and engineering. Least squares support vector machines (LSSVM) are a powerful tool for addressing complex nonlinear problems. This paper describes a LSSVM-based rock failure criterion for analyzing the deformation of a circular tunnel under differentin situstresses without assuming a function form. First, LSSVM was used to represent the nonlinear relationship between the mechanical properties of rock and the failure behavior of the rock in order to construct a rock failure criterion based on experimental data. Then, this was used in a hypothetical numerical analysis of a circular tunnel to analyze the mechanical behavior of the rock mass surrounding the tunnel. The Mohr-Coulomb and Hoek-Brown failure criteria were also used to analyze the same case, and the results were compared; these clearly indicate that LSSVM can be used to establish a rock failure criterion and to predict the failure of a rock mass during excavation of a circular tunnel.

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16

Golik, Vladimir. "Substantiating the method of filling the goaf using the rock jam phenomenon." Izvestiya vysshikh uchebnykh zavedenii Gornyi zhurnal, no. 1 (February 17, 2020): 25–35. http://dx.doi.org/10.21440/0536-1028-2020-1-25-35.

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Research subject, theme, and aim center on detailing jam mechanism of discrete rock in hard rock masses and implementing its residual strength to optimize the processes of goaf filling. Research methodology includes structural mechanics and continuum mechanics provisions application to explain and improve the methods of using the mechanism of discrete rocks residual strength implementation due to rock jam when calculating the host rock state control parameters. Research results and scope. The idea of goaf filling during dislocated deposits underground mining is described. Information is given on the geological structure of the studied rocky ore deposit and the role of tectonic structures in the behavior of the mass during its development. The results of the research carried out on the state of the rock mass are shown and some geotechnical sites are distinguished as part of it on the basis of rock weakness feature. Some variants of host rock behavior depending on the joint blocks jam phenomenon are considered. The possibilities are substantiated of goaf filling by combining the methods of filling with insulation and stowing with hardening mixtures. The scope of the research results is recommended for solid mineral deposits underground development. Summary. For the moment, the use of computational methods at discrete rock residual strength implementation due to rock jam through discrete rock jamming properties is a little-used factor of a goaf filling technology, which makes it possible to obtain an environmental and economic effect while ensuring the safety of mining

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17

Jin, Yong Fei, Jun Guo, and Ning Fang Yue. "Study on Overburden under Temperature Loading Coal Seam Outcrop Fire Area Heat Damage Mechanics Characteristics Experiment." Advanced Materials Research 1004-1005 (August 2014): 1198–203. http://dx.doi.org/10.4028/www.scientific.net/amr.1004-1005.1198.

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Maglev uses MTS815.02 rock mechanics experimental electro-hydraulic systems and NM-4A nonmetallic ultrasonic testing analyzer for coal fire area overlying rock outcrop samples were heated fracture mechanics properties of experimental studies of rock samples reveal the strength and deformation characteristics with temperature the variation. The results showed that: rock microstructure changes at high temperatures on the mechanical properties have a significant effect, the higher the temperature, the greater the sandstone porosity, fissures, the more velocity is smaller; fire zone in the role of coal outcrops, rocks and mineral composition and structure has changed, the internal expansion of initial damage evolution, a large amount of leakage fissures, heat pressure increases, resulting in the upper part of the coal temperature of natural convection of air through the crack, thereby maintaining the vicinity of the coal to maintain a certain concentration of oxygen. Dynamic evolution of coal seam outcrop fire mechanism provides a theoretical basis.

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18

Song, Rui, Lifu Zheng, Yao Wang, and Jianjun Liu. "Effects of Pore Structure on Sandstone Mechanical Properties Based on Micro-CT Reconstruction Model." Advances in Civil Engineering 2020 (February 24, 2020): 1–21. http://dx.doi.org/10.1155/2020/9085045.

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As porous, heterogeneous, and anisotropic material, the microscopic structure of the rock has a significant influence on its mechanical properties. Rare studies were devoted to this area using pore scale modeling and simulations. In this paper, different types of sandstones are imaged using micro-CT technology. The rock porosity is obtained by filtering, binarization, and threshold segmentation. The texture coefficient (TC) and the tortuosity of the rock skeleton are calculated by open source program, where the tortuosity of the rock skeleton is firstly used to characterize the microscopic structure of the rock. Combining with the rock mechanics parameters obtained in the laboratory, the simulation of uniaxial compression is performed on the reconstructed pore scale rock finite element mesh model by ANSYS software. Young’s modulus, compressive strength, yield strength, shear modulus, and other related parameters obtained by numerical simulation are adopted to determine the optimal representative volume element (RVE) size. Moreover, the effects of microscopic structure characteristics on the mechanical properties of the rock are studied quantitatively. The results indicate that the averaged von Mises stress distribution, displacement field, and plastic strain field of rocks show anisotropy and heterogeneity. The stress concentration and the X-shaped conjugate plastic shear zone are investigated. The samples of S1∼S4 reach the elastic limit and enters the plastic yield state, when the strain is about 0.5%. And the critical yield strain of samples S5300-1∼S5400-2 is about 1%. Then, the quantitative relationships between porosity, TC, tortuosity of rock skeleton and rock mechanics parameters of digital rock samples are established and analyzed. The tortuosity of the rock skeleton is highly correlated with the mechanical parameters of the rock, i.e., Young’s modulus (R2 = 0.95), compressive strength (R2 = 0.94), yield strength (R2 = 0.92), and shear modulus (R2 = 0.94), which is believed to be more feasible to reveal the impacts of the microstructure of the rock on its mechanical properties.

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19

Grishchenko, Alexey, Artem Semenov, and Boris Melnikov. "Modeling the processes of deformation and destruction of the rock sample during its extraction from great depths." Journal of Mining Institute 248 (May 25, 2021): 243–52. http://dx.doi.org/10.31897/pmi.2021.2.8.

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Article investigates the change in the geophysical properties of rocks in the process of extracting the rock sample from great depths. Evaluation of changes in effective elastic properties, porosity and permeability of rock samples during extraction was carried out by means of finite element modeling. Assessment of the critical dimensions and orientation of internal defects, leading to the destruction of the rock samples during extraction from great depths, has been made based on the methods of linear destruction mechanics. Approach that makes it possible to calculate the change in the mechanical properties, porosity and fracturing of reservoir rocks in the process of extracting the rock sample from depths to the surface is proposed. Use of refined data on the mechanical properties of recoverable rock samples makes it possible to increase the accuracy of digital geological models required for geological exploration, determination of reservoir properties and oil and gas saturation of a field, and development of oil and gas deposits. Application of such models is especially relevant at all stages of the fields development with hard-to-recover reserves.

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20

Tai, Yanzhi. "Study on Prediction Model of Mechanical Parameters of Rock Frozen-Thawed Damage based on NMR Technology." Geofluids 2022 (August 10, 2022): 1–8. http://dx.doi.org/10.1155/2022/5046892.

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In order to establish prediction models for the mechanical parameters of rock freeze-thaw damage based on nuclear magnetic resonance (NMR) technology, with reference to the laboratory test of rock mechanical parameters after freeze-thaw, combined with low-field NMR and multivariate analysis methods, PLSR and PCR prediction models for the peak stress, peak strain, and elastic modulus of frozen-thawed rocks were established. The results show that the correlation coefficient of calibration set ( R 2 cal ) and validation set ( R 2 val ) of the PLSR and PCR prediction models are both greater than 0.9, and the residual prediction deviation (RPD) of each model is greater than 3, indicating that the established prediction models have good stability, small relative error, and high prediction accuracy. The application evaluation results show that the peak stress and peak strain of frozen-thawed rocks can be accurately predicted using these models. In this paper, only the NMR tests are performed on the frozen-thawed rocks, and no rock mechanics experiments are performed. The research results provide a new method for the research of rock freeze-thaw damage.

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21

Cieślik, Jerzy. "Dilatancy as a measure of fracturing development in the process of rock damage." Open Geosciences 10, no. 1 (September 14, 2018): 484–90. http://dx.doi.org/10.1515/geo-2018-0038.

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Abstract Dilatancy understood as inelastic volume changes of rock under conditions of differential stress not only foreshadows brittle rock failure [1, 2, 3], preceding such phenomena as earthquakes or mining-induced rockbursts, but also defines the kinematics of rock deformation [4, 5]. This article shows that there is a quantitative relationship between the dilatancy occurring at different levels of rock load and the development of fracturing that accompanies the process of rock degradation. Based on the mechanical laboratory test results of Wustenzelleer fine-grained sandstone, the article presents analyses of plastic volume changes in rock samples and a certain measure of fracture development accompanying the process of their degradation. Thanks to the characteristics obtained through mechanical tests with unloading, the inelastic volumetric strain of the samples was established, and the scalar damage variable (CDM - continuum damage mechanics approach) was determined at various load levels. These results demonstrated the relationship between dilatancy and rock stiffness changes describing the development of fracturing. Three load intervals were determined, in which the nature of the analysed phenomena, i.e. dilatancy and damage describing the development of cracks, undergoes significant changes. The highest intensity of both phenomena was obtained in the post-critical load range, between the ultimate strength limit and the residual strength of the samples, in which rock samples undergo the process of degradation the most. Obtained dependencies allow the correlation to be taken into account in damage mechanics models describing the variable stiffness of rocks in the loading process.

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Pan, Haoyu, Cheng Zhao, Huiguan Chen, Hongwei Yang, and Jinquan Xing. "Meso-mechanical behavior of crystalline rocks: An image-based discrete element method." IOP Conference Series: Earth and Environmental Science 1331, no. 1 (May 1, 2024): 012018. http://dx.doi.org/10.1088/1755-1315/1331/1/012018.

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Abstract This research examines the meso-mechanical behavior of rock materials under various loading conditions, with a focus on the influence of mesoscale heterogeneity in crystalline rock specimens. Traditional approaches often rely on a limited set of statistical parameters for constructing numerical models, failing to capture the complex mesoscale heterogeneities integral to rock mechanics. To overcome this limitation, the study utilizes an advanced image-processing technique to accurately identify mineralogical features within rock microstructures. The extracted mineralogical data were then integrated into a discrete element method (DEM) model to explore the mesoscale mechanical responses of crystalline rocks. The results of the simulations indicated that mesoscale heterogeneities play a critical role in stress concentration localization, which in turn dictates the direction of fracture propagation and leads to a sophisticated interaction among various fracture pathways.

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23

Beeler, N. M. "Principles of rock mechanics." Eos, Transactions American Geophysical Union 79, no. 41 (1998): 496. http://dx.doi.org/10.1029/98eo00372.

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Hsieh, P. A. "Fundamentals of Rock Mechanics." Geofluids 9, no. 3 (August 2009): 251–52. http://dx.doi.org/10.1111/j.1468-8123.2009.00251.x.

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Brown, E. T. "Rock mechanics in Australia." International Journal of Rock Mechanics and Mining Sciences 39, no. 5 (July 2002): 529–38. http://dx.doi.org/10.1016/s1365-1609(02)00055-2.

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Stephansson, O. "Rock mechanics in Sweden." International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts 26, no. 1 (January 1989): 1–11. http://dx.doi.org/10.1016/0148-9062(89)90520-2.

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Debreczeny, P. A. "Rock and soil mechanics." Geotextiles and Geomembranes 9, no. 2 (January 1990): 199–200. http://dx.doi.org/10.1016/0266-1144(90)90014-4.

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K.G.S. "Rock mechanics in hydroengineering." Computers and Geotechnics 9, no. 3 (January 1990): 235–36. http://dx.doi.org/10.1016/0266-352x(90)90016-o.

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Oertel, G. "Principles of Rock Mechanics." Tectonophysics 287, no. 1-4 (March 1998): 319–20. http://dx.doi.org/10.1016/s0040-1951(98)80076-0.

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Rose, Arthur W. "Petroleum-related rock mechanics." Journal of Geochemical Exploration 48, no. 3 (August 1993): 372. http://dx.doi.org/10.1016/0375-6742(93)90015-e.

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Gurevich, Alexander E., and George V. Chilingarian. "Petroleum related rock mechanics." Journal of Petroleum Science and Engineering 9, no. 4 (July 1993): 352. http://dx.doi.org/10.1016/0920-4105(93)90066-n.

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Lunardi, P., P. Froldi, and E. Fornari. "Rock mechanics investigations for rock slope stability assessment." International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts 31, no. 4 (August 1994): 323–45. http://dx.doi.org/10.1016/0148-9062(94)90901-6.

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Huang, Linqi, Shaofeng Wang, Xin Cai, and Zhengyang Song. "Mathematical Problems in Rock Mechanics and Rock Engineering." Mathematics 11, no. 1 (December 25, 2022): 67. http://dx.doi.org/10.3390/math11010067.

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Tang, Hong Mei, Hong Kai Chen, and Xiao Ying He. "Study on Duration for Perilous Rock to Form." Advanced Materials Research 455-456 (January 2012): 1525–31. http://dx.doi.org/10.4028/www.scientific.net/amr.455-456.1525.

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As one geological disaster in the area of the Three Gorges Reservoir of China, perilous rocks dominate stability of slopes in the area. Most cliffs or steep slopes are alternately composed of inflexible rock such as sandstone and soft rock such as mudstone in the area, and due to different weathering velocities rock cells in soft rock below inflexible rock are usually developed. Any perilous rock belongs to a part of inflexible rock. To appraise the safety of perilous rock, it is essential to approach duration for perilous to form is of interest. In the present paper, authors analyze weathering velocity of rock cell and establish method to calculate length of critical rock cell. Duration for perilous rock to form can be divided into three parts, (1) duration to form critical rock cell, (2) damage duration of control fissure, and (3) fracture duration of control fissure. Further, methods to calculate these durations are established in details based on damage mechanics and fracture mechanics.

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Wang, Jian Hua. "Study on Random Reliability Analysis of Dam Abutment." Advanced Materials Research 214 (February 2011): 218–23. http://dx.doi.org/10.4028/www.scientific.net/amr.214.218.

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Stability reliability analysis of abutment rock of arch dam is a very complicated problem which must be studied and solved. Generally, entirely sliding stability reliability analysis should be made when abutment rock bounded by structure planes like fault, joints and fissures, and layers is possible to slide. Due to the complex causes and structures, diverse litholigy, different rocks have different mechanics attributes. While the physical and mechanical parameters of the same rocks are of obvious dispersion and uncertainty. And it is also complex to calculate the pushing force at arch abutment on dam abutment rock, because the uncertain factors as water pressure, sediment, variable temperatures and materials parameters are contained. In this essay, based on Stochastic Finite Element Method, the formula of sliding stability reliability analysis of dam abutment rock is given. The formula can be used for entirely stability reliability analysis of dam abutment.

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Ahmed, Tufail, Syed Hafeez Ur Rehman, Fahim Ahmed Ibupoto, Asif Abbas, Sami Ullah, Abbas Hussain, and Shehzad Usman. "EXPERIMENTAL INVESTIGATION OF DURABILITY AND STRENGTH OF SANDSTONE AND SHALE OF UNITED MINERAL COAL COMPANY SOR-RANGE, BALOCHISTAN." Journal of Mountain Area Research 7 (May 19, 2022): 56. http://dx.doi.org/10.53874/jmar.v7i0.143.

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Mining operations deal mainly with hard and soft rocks with different mechanical properties and varying strengths. The aim of the slake durability test is to present an index related to degradation resistance of rock when exposed to standard cycles of wetting and drying. Research in geology and rock mechanics is done to explain the influence of the rock index properties in determining the strength, durability and pulse velocity of the rock. This paper enlightens the prediction of the rock’s behavior and nature of the degradation of rocks The index values obtained for sandstone are varying from 97.36 to 99.04% and for shale it ranges from 10.21 to 14.06%. The slake durability index test for sandstone sample indicates that it is high durable and the shale indicates very low durability. The average value of uniaxial compressive strength was calculated to be 83.144 MPa.

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Davarpanah, M., G. Somodi, L. Kovács, and B. Vásárhelyi. "Complex analysis of uniaxial compressive tests of the Mórágy granitic rock formation (Hungary)." Studia Geotechnica et Mechanica 41, no. 1 (April 12, 2019): 21–32. http://dx.doi.org/10.2478/sgem-2019-0010.

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AbstractUnderstanding the quality of intact rock is one of the most important parts of any engineering projects in the field of rock mechanics. The expression of correlations between the engineering properties of intact rock has always been the scope of experimental research, driven by the need to depict the actual behaviour of rock and to calculate most accurately the design parameters. To determine the behaviour of intact rock, the value of important mechanical parameters such as Young’s modulus (E), Poisson’s ratio (ν) and the strength of rock (σcd) was calculated. Recently, for modelling the behaviour of intact rock, the crack initiation stress (σci) is another important parameter, together with the strain (σ). The ratio of Young’s modulus and the strength of rock is the modulus ratio (MR), which can be used for calculations. These parameters are extensively used in rock engineering when the deformation of different structural elements of underground storage, caverns, tunnels or mining opening must be computed. The objective of this paper is to investigate the relationship between these parameters for Hungarian granitic rock samples. To achieve this goal, the modulus ratio (MR = E/σc) of 50 granitic rocks collected from Bátaapáti radioactive waste repository was examined. Fifty high-precision uniaxial compressive tests were conducted on strong (σc >100 MPa) rock samples, exhibiting the wide range of elastic modulus (E = 57.425–88.937 GPa), uniaxial compressive strength (σc = 133.34–213.04 MPa) and Poisson’s ratio (ν = 0.18–0.32). The observed value (MR = 326–597) and mean value of MR = 439.4 are compared with the results of similar previous researches. Moreover, the statistical analysis for all studied rocks was performed and the relationshipbetween MR and other mechanical parameters such as maximum axial strain $\left( {{\varepsilon }_{\text{a,}\,\text{max}}} \right)$for studied rocks was discussed.

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András, József, and József Kovács. "Results of Research Related to Reducing Energy Consumption in the Rock Wining Process." Műszaki Tudományos Közlemények 18 (2023): 1–4. http://dx.doi.org/10.33894/mtk-2023.18.01.

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Energy consumption is the main parameter describing the efficiency of the rock winning process in mechanical excavation. Because the rock winning process is a very complex one, the strength properties of rocks prescribed by classical rock mechanics is not sufficient: Knowledge of cutting forces values, and of the shape and volume of removed chips – based on tool geometry and cutting head kinematics – has significant importance in the optimal design of winning machines, and in improving their operating parameters. The paper deals with some results in research performed at the University of Petroșani on these issues, both in theoretical findings and experimental assays in laboratory and on site.

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Li, Haifeng, Qiang Wang, Yongbin Wu, Bolin Lv, Chao Wang, and Jipeng Zhang. "Study on the Rule of Change of Reservoir Rocks under Subcritical Steam Effect." Energies 17, no. 6 (March 10, 2024): 1323. http://dx.doi.org/10.3390/en17061323.

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This paper examines the lithology, pore throat, and fluid characteristics of the reservoir in Liaohe Oilfield Block 3624, using group V rocks as an example, combining a high-temperature and high-pressure reaction still with other equipment such as a rock mechanics tester and a scanning electron microscope. This study also designs and develops three controlled variable experiments, including the subcritical steam reservoir rock dissolution experiment, the subcritical steam reservoir rock mineral composition transformation experiment, and the subcritical steam reservoir rock mineral mechanical property experiment, also making clear the rule of change on the part of the rocks in the deep and heavy oil reservoirs after the injection of subcritical steam. Experimental results reveal the following: (1) Steam causes the dissolution of rocks, and when the steam temperature is in the subcritical region, dissolution is visible. After a 350 °C subcritical steam treatment, the relative melting temperatures of the components of rock materials are substantially greater than the melting point of the cement holding them together, causing the cement to significantly dissolve and a secondary crack network to emerge. (2) The mineral composition of the rocks changes as a result of elevated temperatures, with various mineral transformation trajectories being recorded after various steam treatments. Montmorillonite in reservoir rocks is converted into minerals like illite and chlorite in the subcritical steam temperature range. Another element influencing the creation of secondary cracks on rock surfaces is the reciprocal transformation of minerals, which alters the cohesiveness among mineral components. (3) Rocks suffer thermal damage and changes to their mechanical characteristics as a result of high-temperature steam dissolution and mineral transformations; the severity of these changes increases with the steam temperature.

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Zhao, Xingdong, Shaolong Qin, Yangyang Li, Wenlong Yu, and Tong Wu. "Analyzing Support Stability of Deep Shaft Based on Plastic Softening and Dilatancy of Hard Rock Mass." Processes 11, no. 1 (January 6, 2023): 186. http://dx.doi.org/10.3390/pr11010186.

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To explore the stability analyses and control methods for surrounding rocks in deep hard rock shafts, this paper is based on field engineering geological surveys and laboratory rock mechanics tests and relies on the main shaft being constructed in the Shaling Gold Mine of China as the engineering background. The quality of the rock mass is evaluated by the Q system, rock mass rating (RMR) and geological strength index (GSI). The mechanical parameters of the surrounding rock mass of the shaft are calculated by using the generalized Hoek–Brown failure criterion, and the main support system is determined based on the rock mass classification system. Based on the finite element method, a two-dimensional plane strain model is constructed to analyze and evaluate the deformation and plastic region range of surrounding rocks for different support systems. On this basis, considering the dilatancy and plastic softening characteristics of hard rock masses, an analytical solution of the stress, strain and plastic region radius of hard rock around shafts in homogeneous media is proposed. Finally, the plastic region of the surrounding rock is measured by the P-wave velocity test method. The results show that after considering the dilatancy and plastic softening characteristics of the rock mass, the numerical simulation, theoretical analytical solution and measured results are basically consistent, and the proposed support system can effectively ensure the stability of the shaft.

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Wang, Chun Guang, Yong Sheng Liang, Xiu Juan Liu, Yong Ji Lu, Xin Wang, and Sheng Yang. "Electro-Hydraulic Servo System Modeling and Dynamic Performance Analysis of Mechanics of Rock Materials Testing Machine." Advanced Materials Research 765-767 (September 2013): 1867–72. http://dx.doi.org/10.4028/www.scientific.net/amr.765-767.1867.

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The complete stress-strain curve of rock is obtained mostly by the rock mechanics tester. So the rock mechanic tester is quite important in industry. It provides the scientific data for engineering design and construction. But the material of rock is made of special complex natural structure. It is very hard to obtain the complete and true performance data of rock by the common material tester which causes rock broken easily. The main cause lies on the slow response of control system, the bad performance and rigidity. In order to solve the question, this paper studies the rock mechanics tester intelligent control by computer electro-hydraulic servo device by means of computer technologies, electromechanical integration technologies and hydraulic technologies.The main work of this paper is about the modeling and simulation, mechanics of materials testing machine intelligent control to lay the foundation for further study.

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Yu, Sheng, Jie Zhang, Xin Li, Cuinan Li, and Rongxin Li. "Research on a mechanical model of coal and rock around well based on variable temperature." MATEC Web of Conferences 358 (2022): 01014. http://dx.doi.org/10.1051/matecconf/202235801014.

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To analyze the mechanical properties of coal and rock under variable temperature, the mechanical model of coal and rock around the well under variable temperature is studied based on elastic-plastic mechanics and thermodynamic theory. The control equations of coal and rock deformation, seepage field, and temperature field around the well considering temperature and clay mineral content are derived. On this basis, the finite element numerical simulation is carried out by using the relevant parameters obtained from coal and rock mechanics experiments. The numerical simulation results show that the coal rock strength, peak stress, and peak strain show a decreasing trend when the temperature increases and the simulation results of the coal samples are consistent with the experimental results, which verifies the reasonableness of the mechanical model.

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Shanzhi, Shi, Zhao Chaoneng, Liu Hai, Ding Kun, Li Jie, Chen Jin, Chen Ning, Ma Junxiu, and Song Pengju. "Experimental Study on Rock Mechanics Parameters-A Case of the Sand Conglomerate Reservoir in M2 Well Area." E3S Web of Conferences 53 (2018): 03067. http://dx.doi.org/10.1051/e3sconf/20185303067.

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This paper presents the acoustic characteristics tested on 20 groups of cores (20 vertical samples and 60 horizontal samples) from the sand conglomerate reservoir in Baikouquan and lower Wuerhe Formation (two wells in the M2 well area). The average values of dynamic modulus of elasticity and Poisson's ratio of rocks from Baikouquan Formation are 32.1 GPa and 0.2055 respectively, and those of lower Wuerhe Formation are 28.4 GPa and 0.2425 respectively. The three axis rock mechanics test device is used to test the stress-strain curves of the corresponding rock samples. The sand-conglomerate samples in this area generally have good brittleness characteristics; the static modulus of elasticity and Poisson's ratio of the corresponding rock samples are 13.7GPa and 0.2858 respectively, and those of rocks from lower Wuerhe Formation are 14.9GPa and 0.2565, respectively. In general, there is a good correlation between P&S wave velocity, and poor correlation in the dynamic and static mechanical parameters.

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Zhang, H., X. L. Liu, Z. Huang, and X. L. Lu. "Study on rock energy evolution and constitutive model under water–rock interaction." IOP Conference Series: Earth and Environmental Science 1331, no. 1 (May 1, 2024): 012003. http://dx.doi.org/10.1088/1755-1315/1331/1/012003.

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Abstract To explore the degradation in rock mechanical properties due to water–rock interactions and formulate a nonlinear damage constitutive model for the entire stress–strain curve of rocks, experiments involving saturated, dry-wet cycling, and uniaxial compression tests were conducted on granite and siltstone. Based on energy theory, the energy evolution of the rock throughout the testing process was scrutinized. The range of the compaction stage was identified through the analysis of the dissipation energy change curve. A nonlinear damage constitutive model for rocks subjected to water-rock interactions was then devised, drawing on concepts from statistical damage mechanics. The findings indicated a progressive reduction in uniaxial compressive strength and elastic modulus due to water–rock interactions, while the Poisson’s ratio was observed to increase. The energy density curve under these conditions delineated four distinct phases: compaction energy dissipation, linear energy accumulation, pre-peak gradient increase, and post-peak sudden change. The introduction of the unit elastic strain energy density metric underscored the deteriorating effects from an energy standpoint. A nonlinear damage constitutive model, incorporating the compaction stage based on a coupled damage variable, was formulated. The predictions of this model closely matched the empirical data, thereby affirming its validity. This model provides an enhanced depiction of rock deformation and failure mechanisms under the influence of water–rock interactions.

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Chen, Hong Kai, Yun Tao Zhou, and Zhi Wang. "Study on Damage Characteristics of Unstable Rocks under Excitation Effect." Applied Mechanics and Materials 459 (October 2013): 575–81. http://dx.doi.org/10.4028/www.scientific.net/amm.459.575.

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Unstable rock is the typical geological disaster in areas of highway, city and mine. Energy from rupture of unstable rock passes around by excitation wave, which produces significant excitation effect to adjacent unstable rock, and which is one of important reasons to cause the cascading collapse. By the method of wave mechanics calculation equation of peak velocity from unstable rock caused by rest energy through interface between unstable rocks was deduced and established. Based on the rule of Sweden and Canmet, authors proposed damage criteria of unstable rock under excitation effect. According to damage mechanics, authors set up estimation method of microcrack being likely activated to rest unstable rock under excitation effect. Example analysis shows that problem considering excitation damage is an important way of promoting the scientific and transient security analysis of unstable rock. Research results have a positive significance for science reveals of unstable rock failure mechanism.

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Li, Jianan, Heping Xie, Ling Chen, Cong Li, and Zhiqiang He. "Exploring Deep-Rock Mechanics through Mechanical Analysis of Hard-Rock In Situ Coring System." Advances in Civil Engineering 2020 (September 7, 2020): 1–11. http://dx.doi.org/10.1155/2020/8899156.

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Exploration of deep-rock mechanics has a significant influence on the techniques of mining and rock mechanics. Rock coring technique is the basic method for all rock mechanics study. With the increase of the drilling depth and increasing strength of the hard rock, how to obtain high-quality rock core through various coring techniques is an eternal work. Here an innovative method is applied to design the new coring system to maximize the efficiency of operation. The stress conditions or parameters of rock core in the coring are analyzed, and the mechanism of the core with in situ stress is shown in this paper. The conflict of the core and coring tool chamber is proposed for the innovative design. The innovative design method is fulfilled by the theory of inventive problem solving (TRIZ). An improved coring system for the full-length core with in situ stress was obtained with the solutions of improved coring mechanism, cutting mechanism, and spiral drill pipe.

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Bai, Hui Ren, Yong Jian Shi, and Lan Xiang Chen. "The Loosen Circle Radius Based on the Theory of Damage Mechanics." Advanced Materials Research 1089 (January 2015): 303–6. http://dx.doi.org/10.4028/www.scientific.net/amr.1089.303.

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<p class="ordinary-outputtarget-output">After surrounding rock is disturbed by some damage form a loosen circle in surrounding rocks of a roadway, in order to solving the range of loosen circle, mechanical mechanism of loosen circle was discussed on the basis of damage mechanics and loosen circle radius calculation formula proposed. This work has some certain reference for roadway support design.</p>

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Lu, Hai Jun, Guang Hua Cai, Li He, Zhu Yun Hu, and Jiang Shan Li. "The Effect of Heterogeneity and Element Sizes on Rock Mechanics Properties." Advanced Materials Research 243-249 (May 2011): 2643–46. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.2643.

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Based on the analysis of the experiment, a statistical damage model can be established according with Weibull distribution from the basic characteristics of rocks, the statistic theory of heterogeneity and the microscopic principles of damages, analyze the constitutive relationship of rocks through the stress-strain relationship, heterogeneity, and the element sizes. According to the analysis of rock strength and failure models in numerical simulation, it is acquired the influence of heterogeneity and element sizes on rock mechanics properties. The results of numerical simulation provide a new way for the study of the medium macro behavior on the deformations and fractures.

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Luo, Tao, Yong Tao Gao, and Hong Jian Lu. "Study on the Stress Concentration Law and Impacting Disasters in Roadway of Some Mine." Advanced Materials Research 791-793 (September 2013): 1550–53. http://dx.doi.org/10.4028/www.scientific.net/amr.791-793.1550.

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The impact disasters of rock burst and pressure bump are common problems of underground construction and deep mining [1-. This paper selected the typical mine based on the work of field crustal stress measurement, indoor rock mechanical experiment, parameter calculation, numerical analysis and field disaster investigation, etc,. Deeply analysed the basic types and potential laws of possible impact disaster after a mines main tunnel excavation based on the study idea of experimental rock mechanics and computational rock mechanics co-ordination and additional verification.

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Shi, Genhua. "Discontinuous Deformation Analysis in Rock Mechanics and Rock Engineering." IOP Conference Series: Earth and Environmental Science 861, no. 3 (October 1, 2021): 032060. http://dx.doi.org/10.1088/1755-1315/861/3/032060.

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Journal articles on the topic 'Rock mechanics'

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