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Journal articles on the topic 'Rock deformation'

Author: Grafiati

Published: 4 June 2021

Last updated: 29 July 2024

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1

Fan, Jinyan, Zhibiao Guo, Xiaobing Qiao, Zhigang Tao, Fengnian Wang, and Chunshun Zhang. "Constant Resistance and Yielding Support Technology for Large Deformations of Surrounding Rocks in the Minxian Tunnel." Advances in Civil Engineering 2020 (September 28, 2020): 1–13. http://dx.doi.org/10.1155/2020/8850686.

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During the excavation of the Minxian tunnel, problems of large deformations of surrounding rocks and failure of support structures appeared frequently, which caused serious influences on construction safety and costs of the tunnel. Based on laboratory analysis of mineral composition and field investigations on deformation characteristics of the surrounding rocks, the large deformation mechanism of surrounding rocks of the tunnel was considered as water-absorbing swelling molecules of carbonaceous slate and stress-induced asymmetric structural deformations of the surrounding rocks. The structur

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2

Chaturvedi, Lakshmi S., Harold M. Marsh, and Marc D. Basson. "Role of RhoA and its effectors ROCK and mDia1 in the modulation of deformation-induced FAK, ERK, p38, and MLC motogenic signals in human Caco-2 intestinal epithelial cells." American Journal of Physiology-Cell Physiology 301, no. 5 (2011): C1224—C1238. http://dx.doi.org/10.1152/ajpcell.00518.2010.

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Repetitive deformation enhances intestinal epithelial migration across tissue fibronectin. We evaluated the contribution of RhoA and its effectors Rho-associated kinase (ROK/ROCK) and mammalian diaphanous formins (mDia1) to deformation-induced intestinal epithelial motility across fibronectin and the responsible focal adhesion kinase (FAK), extracellular signal-regulated kinase (ERK), p38, and myosin light chain (MLC) signaling. We reduced RhoA, ROCK1, ROCK2, and mDia1 by smart-pool double-stranded short-interfering RNAs (siRNA) and pharmacologically inhibited RhoA, ROCK, and FAK in human Caco

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3

Usanov, S. V., Yu P. Konovalova, E. Yu Efremov, О. D. Kharisova, and А. V. Usanova. "Unexpected deformation processes in the rock mass in surface mining: Emergence factors and prevention capabilities." Mining Industry Journal (Gornay Promishlennost), no. 1S/2022 (March 16, 2022): 111–18. http://dx.doi.org/10.30686/1609-9192-2022-1s-111-118.

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Unexpected abnormal deformation processes in rock masses lead to disruptions in the operation of mining facilities and endanger human life and health. The studies show that physiographic conditions, physical and mechanical properties of rocks, features of structural and tectonic structure of the rock mass can influence the unexpected character of the deformation phenomena. One of the important parameters that determines the development of catastrophic deformation processes is the geodynamic activity of the rock mass, which forms its stress state. The purpose of the research is to develop metho

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4

Wang, Ru Bin, Wei Ya Xu, and Jiu Chang Zhang. "Modeling Coupled Flow-Stress-Damage during Creep Deformation." Applied Mechanics and Materials 204-208 (October 2012): 3294–98. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.3294.

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In order to reflect the tertiary rheological characteristics of hard rocks at the high stress states, a new nonlinear visco-elastic-plastic model is proposed on the basis of linear visco-elastic-plastic model and nonlinear visco-elastic-plasticity. And then the corresponding constitutive model are deduced, which can be used for describing rocks’ long-term strength characteristics and their creep deformational behavior and time-dependent damage under interaction of coupled seepage-stress field in rock engineering. At last, considering the time effect of rock damage in the process of tertiary cr

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5

Muñiz-Menéndez, Mauro, and Ignacio Pérez-Rey. "Intact rock deformation bimodularity: an experimental study." IOP Conference Series: Earth and Environmental Science 1124, no. 1 (2023): 012041. http://dx.doi.org/10.1088/1755-1315/1124/1/012041.

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Abstract Rock deformability under tensile stresses plays an important role in different scenarios like, e.g., in the mechanical behaviour of roofs in underground openings, hydraulic fracturing, dilatometer tests performed in massive rock masses or in tensile strength tests. Different authors have proved that the tensile deformation modulus of the intact rock can be significantly different than that obtained under compressive load, being this so-called ‘bimodularity’ often ignored. In this work, we present preliminary results from uniaxial compressive and tensile strength tests carried out in t

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6

Guzev, Mikhail, and Vladimir Makarov. "Investigation of Deformation of Rock Samples." Key Engineering Materials 744 (July 2017): 61–65. http://dx.doi.org/10.4028/www.scientific.net/kem.744.61.

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Deformation of rock samples compressed up to failure has been studied in laboratory. A system of trustworthy deformational precursors of the failure stage has been developed. The system includes long-term, middle-term and short-term precursors, which correspond to the threshold of dilatancy, change of the specific volume deformation, and jump of the specific volume deformation increments, respectively. Proposed methods of the complex research include deformation and mathematical methods. The mathematical model of deformation in samples of rocks at uniaxial compression is founded on hypothesis

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7

Shashenko, Oleksandr, Vladyslava Cherednyk, Natalia Khoziaikina, and Dmitro Shashenko. "PHYSICAL PREREQUISITES FOR GAS PERMEABILITY SIMULATION OF MINED ROCK MASS." JOURNAL of Donetsk Mining Institute, no. 2 (2021): 78–84. http://dx.doi.org/10.31474/1999-981x-2021-2-78-84.

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Purpose. Justification of the gas collectors formation physical model on the basis of research of conformity of permeability of rock mass to the full diagram of rock sample deformation. Methodology consists in sequential analysis of the stages of the complete deformation diagram of the rock specimen under “hard” loading, comparing them with the stages of formation of the high stress zone in front of the lava bottom and statistical analysis of laboratory test results. Results. Based on the rock’s deformation properties analysis and their comparison with the rock sample full deformation diagram,

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8

Xiaoxiong, Guo, Wang Ning, Xu Xueliang, and Ye Zihui. "Analysis of Extent of Deformation Range and Failure Characteristics of Rocks Surrounding a Tunnel Crossing Fault Zone Based on FDEM." Advances in Civil Engineering 2022 (August 10, 2022): 1–12. http://dx.doi.org/10.1155/2022/9643584.

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The combined finite-discrete element method (FDEM) and laboratory test were selected to study the extent of deformation range and time-dependent deformation of surrounding rock during tunnel excavation without support in a fault-crossing tunnel project. FDEM was found to accurately reflect the deformation and failure characteristics of different surrounding rocks during stress release, including conjugate shear and extrusion. Analysis of the results showed that the disturbance range of surrounding rocks could reach 1.5 to 2.5 times the tunnel diameter when crossing the fault zone. The rock sur

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9

Fang, You Ling. "An Experimental Study on Destructive Nature of Seam Roof Strata with Horizontal Bedding." Applied Mechanics and Materials 448-453 (October 2013): 3869–72. http://dx.doi.org/10.4028/www.scientific.net/amm.448-453.3869.

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Subjected to external forces, the structure surface between rocks (ie, bedding planes) should be deformed under external force. If the two side walls of the rock bedding plane has perfectly flat smooth surface, after the composite layered rock subjected to force, bedding plane can be closed as surface contact manner. However, the rock bedding plane side walls generally showed local contact state in the nature, the rock layers of bedding planes will produce compressive deformation under stress. Through complete stress - strain triaxial loading experimental study on the effects of the presence o

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10

Feng, Xiaojun, Zeng Ding, Qinjing Hu, Xue Zhao, Muhammad Ali, and Jefferson T. Banquando. "Orthogonal Numerical Analysis of Deformation and Failure Characteristics of Deep Roadway in Coal Mines: A Case Study." Minerals 12, no. 2 (2022): 185. http://dx.doi.org/10.3390/min12020185.

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With the development of deep, underground coal mines in China, the failure mechanism of the rocks surrounding roadways is becoming increasingly complicated and the deformational control is also significantly difficult. In this study, based on the temporal and spatial deformational distribution of the deep roadway area in the 2233 working face of Fuxin Hengda Coal Mine, factors affecting the deformation and failure mechanism of deep-buried roadways, such as cohesion (c), tensile strength (σt), internal friction angle (φ), vertical ground stress (p), and the horizontal-to-vertical stress ratio (

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11

Tkachuk, Oleksandr, Daria Chepiga, Serhii Pakhomov, et al. "Evaluation of the effectiveness of secondary support of haulage drifts based on a comparative analysis of the deformation characteristics of protective structures." Eastern-European Journal of Enterprise Technologies 2, no. 1 (122) (2023): 73–81. http://dx.doi.org/10.15587/1729-4061.2023.272454.

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The object of this study is the processes of managing the state of lateral rocks in the coal rock array with preparatory workings. The influence of deformation characteristics of the protective structures of the preparatory workings on the stability of lateral rocks in the coal rock array has been established. The stable state of the above-the-drift pillars of coal is provided within the deformation resource, which corresponds to the critical level of the specific potential energy of the deformation. The limits of the deformation resource are the range of change in the relative deformation of

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12

Guo, Zhibiao, Jinyan Fan, Fengnian Wang, Hongbo Zhou, and Wei Li. "Geomechanical Model Experiment Study on Deformation and Failure Mechanism of the Mountain Tunnel in Layered Jointed Rock Mass." Advances in Civil Engineering 2021 (February 12, 2021): 1–19. http://dx.doi.org/10.1155/2021/6645124.

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The Minxian tunnel is a key engineering of the Weiyuan-Wudu expressway that is excavated in layered jointed carbonaceous slate rock mass. During the construction process, the surrounding rocks of the tunnel encountered serious large deformations and failure, which brought about great difficulties to the safety and cost of the tunnel. In order to study the deformation and failure mechanism of the surrounding rocks, a physical model test was conducted, and integrated methods including strain gauges, a digital camera, and noncontact full-field digital imaging correlation technique were used to re

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13

Zhang, Cheng, Amagu amagu Clement, Jun-ichi Kodama, et al. "Effect of the Connectivity of Weak Rock Zones on the Mining-Induced Deformation of Rock Slopes in an Open-Pit Mine." Sustainability 16, no. 14 (2024): 5974. http://dx.doi.org/10.3390/su16145974.

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Geological structures significantly influence mining-induced deformations in open-pit mines, with their variations and interactions adding complexity to the excavation process and introducing uncertainties in deformation outcomes. This study utilized numerical simulations to analyze the impact of weak rock zones in a specific open-pit limestone quarry in Japan on mining-induced deformation. The simulation results were both qualitatively and quantitatively validated against field measurements, enhancing the reliability of the findings. Subsequently, four conceptual models were developed based o

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14

Yao, Qiangling, Xuehua Li, Fan Pan, Teng Wang, and Guang Wang. "Deformation and Failure Mechanism of Roadway Sensitive to Stress Disturbance and Its Zonal Support Technology." Shock and Vibration 2016 (2016): 1–14. http://dx.doi.org/10.1155/2016/1812768.

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The 6163 haulage roadway in the Qidong coal mine passes through a fault zone, which causes severe deformation in the surrounding rock, requiring repeated roadway repairs. Based on geological features in the fault area, we analyze the factors affecting roadway deformation and failure and propose the concept of roadway sensitive to stress disturbance (RSSD). We investigate the deformation and failure mechanism of the surrounding rocks of RSSD using field monitoring, theoretical analysis, and numerical simulation. The deformation of the surrounding rocks involves dilatation of shallow rocks and s

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15

Sun, Mingzhi, Gaojian Hu, Jianli Hu, et al. "Simulation Study on the Size Effect of Secant Modulus of Rocks Containing Rough Joints." Sustainability 14, no. 23 (2022): 15640. http://dx.doi.org/10.3390/su142315640.

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The secant modulus reflects the ability of rocks to resist deformation, and it is mostly used to evaluate rock strength and deformation evolution. Due to the existence of rough joints in rocks, the secant modulus changes according to rock size. Therefore, it is very important to effectively obtain the secant modulus to evaluate rough-jointed rock deformation. In this paper, the regression analysis method is used, and 25 sets of simulation models are set up to discuss the influence of joint roughness and rock size on the rock secant modulus. The research shows that the secant modulus increases

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16

Demin, V. F., and V. Zhurov. "Anchor bolt of rock massif in coal mines to decrease soil rock heaving of the workings." Kompleksnoe Ispolʹzovanie Mineralʹnogo syrʹâ/Complex Use of Mineral Resources/Mineraldik Shikisattardy Keshendi Paidalanu 325, no. 2 (2022): 80–86. http://dx.doi.org/10.31643/2023/6445.21.

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During the maintenance of workings, the effects of soil rock heaving, caused by plastic deformation and extrusion into the excavation cavity under the action of the rock pressure, are usually eliminated. The identified patterns of change in the stress-strain state of coal-rock massifs (displacements, stresses, cracking zones), depending on the main mining-geological and mining-technical factors will allow to establish the optimal parameters of soil anchoring, technological schemes for decreasing soil rock heaving of mine workings to increase the stability of preparatory mine workings have been

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17

Green, Harry. "Rock Deformation Meeting." Eos, Transactions American Geophysical Union 71, no. 20 (1990): 715. http://dx.doi.org/10.1029/90eo00188.

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18

Bulat, A. F. "Rock deformation problems." International Applied Mechanics 40, no. 12 (2004): 1311–22. http://dx.doi.org/10.1007/s10778-005-0039-y.

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19

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 cal

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20

Shrestha, Pawan Kumar, and Krishna Kanta Panthi. "Estimating Tunnel Strain in Weak and Schistose Rock Mass under a State of in-situ Stress Anisotropy." Hydro Nepal: Journal of Water, Energy and Environment 16 (February 28, 2015): 7–13. http://dx.doi.org/10.3126/hn.v16i0.12212.

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Tunnels excavated in weak and schistose rock mass below high overburden (rock cover) are prone to instability in the form of tunnel deformation. The deformation in the tunnel takes place to such an extent that it is irreversible and of significant magnitude, which is often known as tunnel squeezing. In order to limit such plastic deformation in tunnels, it is desirable that the response of the rock mass to induced stresses is known so that requirement of rock support can be estimated. Contrary to the assumption of uniform in-situ stresses made in analytical solutions for elasto-plastic analyse

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21

Fu, Bo-Ye, and Li-Yun Fu. "Poro-acoustoelasticity with compliant pores for fluid-saturated rocks." GEOPHYSICS 83, no. 3 (2018): WC1—WC14. http://dx.doi.org/10.1190/geo2017-0423.1.

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Stress-induced influences on elastic wave velocities include elastic and inelastic behaviors. In general, deformation of rocks is primarily linear elastic for small-magnitude stresses; such behavior can be predicted by the conventional poro-acoustoelasticity theory. On the contrary, large-magnitude stresses induce linear elastic deformation in stiff pores and rock grains and nonlinear elastic deformation in compliant pores. Conventional poro-acoustoelasticity combines the kinetic and strain energy functions via the Lagrange equation. This theory reveals the strain energy transformation of the

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22

Tang, Bin, and Hua Cheng. "Application of Distributed Optical Fiber Sensing Technology in Surrounding Rock Deformation Control of TBM-Excavated Coal Mine Roadway." Journal of Sensors 2018 (2018): 1–10. http://dx.doi.org/10.1155/2018/8010746.

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After roadway excavation, the deformation and failure of roadway surrounding rocks typically results in roadway damage or collapse. Conventional monitoring techniques, such as extensometers, stress meters, and convergence stations, are only capable to detect the stress or strain data with the shallow layers of surrounding rocks, and they require arduous manual works. Moreover, in the abovementioned monitoring techniques, the monitoring instruments are installed behind the excavation face; therefore, the strain and deformation occurring in front of excavation face cannot be detected. In order t

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23

Cao, Wengui, Xin Tan, Chao Zhang, and Min He. "Constitutive model to simulate full deformation and failure process for rocks considering initial compression and residual strength behaviors." Canadian Geotechnical Journal 56, no. 5 (2019): 649–61. http://dx.doi.org/10.1139/cgj-2018-0178.

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A constitutive model with capacity to simulate the full deformation and failure process for rocks considering initial compression and residual strength behaviors is discussed in this paper. The rock was assumed to consist of the initial voids portion and the solid skeleton portion. The full deformation model of rocks can be established by the consideration of the macroscopic deformation of rocks and the microscopic deformations of the two different portions based on the statistical damage theory. Comparisons between the experimental data from triaxial compression tests and calculated results s

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24

Zhu, Yimo, Liang Chen, Heng Zhang, Zelin Zhou, and Shougen Chen. "Physical and Mechanical Characteristics of Soft Rock Tunnel and the Effect of Excavation on Supporting Structure." Applied Sciences 9, no. 8 (2019): 1517. http://dx.doi.org/10.3390/app9081517.

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The problem of large deformation is very prominent in deep-buried tunnel excavation in soft rock, which brings serious potential safety hazards and economic losses to projects. The knowledge of deformation law and support measures is the key to ensure the rational design and safe construction in a large deformation tunnel of soft rock. This paper describes rock physical and mechanical tests and field monitoring is employed to investigate the cause and development process of large deformation in Dongsong hydropower station in Sichuan Province, China. The results show that the free expansion rat

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25

Kozyrev, Anatolii, Eduard Kasparyan, Iuliia Fedotova, and Nikolay Kuznetcov. "The specificities of deformations and failures of highly stressed hard rock massifs." E3S Web of Conferences 129 (2019): 01010. http://dx.doi.org/10.1051/e3sconf/201912901010.

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According to modern concepts, the state of highly stressed hard rock massifs is mostly caused by the effect of gravitational-tectonic stress fields. At that, a probability of brittle rock failure in a dynamic form is very high. Such failures are always accompanied by the significant energy release accumulated during the deformation process. Based on the experimental studies of deformation and failure processes in various types of rock samples from the Kola Peninsula deposits, we have proposed the criteria for classifying rocks as prone to rock bursts. The information for assessing the rock pro

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26

Tang, Hao, Xiang Ji, Hongyi Zhang, and Tianbin Li. "Numerical Simulation of Large Compression Deformation Disaster and Supporting Behavior of Deep Buried Soft Rock Tunnel with High In Situ Stress Based on CDEM." Advances in Civil Engineering 2022 (March 3, 2022): 1–13. http://dx.doi.org/10.1155/2022/5985165.

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Large compressive deformation of tunnels is a phenomenon involving plastic deformation and failure of surrounding rocks and often refers to the weak surrounding rock self-bearing capacity loss or partial loss. This research discusses the formation and evolution of large compressive deformation and effectiveness of the combined support of high in situ stress tunnel. From the new perspective of large deformation disaster caused by the structural failure of high in situ stress surrounding rock to clarify it, this paper illustrates the mechanism of progressive cracking and large deformation of hig

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27

Song, Yafen, Li Chen, Xiaotao Zhang, Qian Zhao, Linlin Yu, and Jinhua Xu. "Experimental investigation on the deformation and failure mechanism of slope with interbedding soft and hard rocks under rainfall infiltration." E3S Web of Conferences 194 (2020): 04056. http://dx.doi.org/10.1051/e3sconf/202019404056.

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Taking Peng Jiawan slope in Yiba expressway as the project background, the deformation and failure mechanism of slope with interbedding of soft and hard rocks was studied on the basis of geological analysis and similarity theory. In geomechanical model test, the water infiltration softening process is used to simulate the rainfall infiltration. The result indications showed as follows: under the condition, the deformation mode of the slope is the previous sliding-tension and upper overall creep-slip, and the failure mode is overall slip failure in the sliding zone of deep soft rock. Strictly s

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28

Ma, Dong, Zhongsheng Tan, Linlin Bian, Baojin Zhang, and Jinpeng Zhao. "Research on Deformation and Loose Zone Characteristics of Large Cross Section Tunnel in High Geo-Stress Soft Rock." Applied Sciences 13, no. 15 (2023): 9009. http://dx.doi.org/10.3390/app13159009.

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In constructing high-geo-stress soft rock tunnels, the major deformation disaster of the surrounding rock has always been the main problem faced during construction. The research on the deformation and loose zone characteristics of large deformation tunnels has positive significance for the safe and rapid construction of tunnels. Therefore, based on the Yuntunpu large deformation tunnel, this article first analyzes the geological and deformation characteristics of the tunnel site area in response to the problem of high-geo-stress soft rock large deformation. Subsequently, on-site testing and a

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29

Volokhov, Evgenii, and Diana Mukminova. "Deformations assessment during subway escalator tunnels construction by the method of artificial freezing of soil for the stage of ice wall formation." Записки Горного института 252 (December 17, 2021): 826–39. http://dx.doi.org/10.31897/pmi.2021.6.5.

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The work is devoted to the study of the processes of displacement and deformation of the surface during the escalator tunnels construction of the subway by the method of artificial freezing of soils. The features of the construction and freezing technology, the rocks characteristics in which the escalator tunnels made are considered. The data of specially organized, full-scale surveying observations of deformations on the earth surface are presented. The main factors influencing deformation processes in the frozen strata of a layered inhomogeneous rock mass with inclined tunneling are determin

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30

Khelalfa, Houssam, B. Aykan, and H. Boulmaali. "Monitoring of Tunnel Rock Mass Deformations During Provisional Support Stage: A Case Study." Mining Revue 28, no. 1 (2022): 1–23. http://dx.doi.org/10.2478/minrv-2022-0001.

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Abstract The present study evaluates on site the effects of provisional support on the rate of deformation (convergence) of clay-stone of a twin-tube tunnel. The combination of shotcrete, steel lattice, steel retaining, pre-supporting iron bar and Rock bolts can act as structural support in the form of provisional support for new or existing tunnels. Applications of provisional supports as confinement mechanisms to decrease the capacity of convergence can be helpful for distressed rock mass during tunnels digging. Real-size and real-time field monitoring over a period of approximately one (01)

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31

Wang, Lei, Yu Sheng Li, and Qing Song Huang. "Numerical Simulation Study on the Stress - Deformation Characteristics of Rock Mass of Luding Power Transmission Project in Sichuan." Applied Mechanics and Materials 368-370 (August 2013): 1688–92. http://dx.doi.org/10.4028/www.scientific.net/amm.368-370.1688.

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In this page, combination of finite element numerical simulation and discrete element numerical simulation is used to study the stress - deformation characteristics of rock mass of power transmission project site,whichclarifies the rock mass stress is mainly controlled by thegravitational field,the form of the potential deformationis dominated by compression deformation,andthere is no possibility of occurrence of the horizontal shear deformation.

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Zhang, Guoyu, Zikang Huang, Tao Zhu, et al. "Study on Rheological Properties of Coal Rock Containing Gas under Disturbance Conditions." Shock and Vibration 2022 (June 15, 2022): 1–10. http://dx.doi.org/10.1155/2022/2370301.

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In view of the dynamic phenomenon that coal and rock are susceptible to external impact disturbance in the mining process, combined with the rheological hypothesis mechanism of coal and gas outburst, the RLSS-II-type triaxial loading creep test system of gas-containing coal and rock developed by ourselves is used to carry out the conventional triaxial rheological test of gas-containing coal and rock and the rheological disturbance effect test of gas-containing coal and rock under impact disturbance. The strength limit neighborhood of gas-containing coal and rock is determined, and the gas-cont

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33

Cao, Mengtao, and Shunde Yin. "Study on the Tri-axial Time-Dependent Deformation and Constitutive Model of Glauberite Salt Rock under the Coupled Effects of Compression and Dissolution." Energies 13, no. 7 (2020): 1797. http://dx.doi.org/10.3390/en13071797.

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Solution mining for glauberite salt rock is a long-term process that takes several years to several decades. Therefore, deposit deformations and subsidence of ground surfaces are time-dependent deformation problems that should consider the effect of water dissolution. In order to investigate the time-dependent deformation characteristics of glauberite salt rock, tri-axial time-dependent deformation tests were conducted under the condition of 4 MPa confining pressure and 5 MPa axial pressure with infiltration pressures of 3, 2, 1, and 0 MPa, respectively, and the micro-CT scan system was used t

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34

PAN, PENG-ZHI, XIA-TING FENG, and HUI ZHOU. "RESEARCH ON THE EFFECT OF LOADING CONDITIONS ON THE STRENGTH AND DEFORMATION BEHAVIORS OF ROCKS." International Journal of Modern Physics B 22, no. 31n32 (2008): 5545–50. http://dx.doi.org/10.1142/s0217979208050796.

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The paper aims at a numerical study of strength and deformation behaviors of rocks under different loading conditions in uniaxial compression with an elasto-plastic cellular automaton (EPCA2D) code. Two loading conditions, i.e. with and without considering frictions between loading platens and rock specimen's ends, are used in the failure processes of heterogeneous rocks. Rock specimens are assumed to be the same heterogeneity, i.e. the specimens with different sizes have the same probability of containing flaws. Under this condition, it is concluded that the strength and deformation behaviors

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35

Shi, Da Kun, and Yang Song Zhang. "A Study on Stability of Expressway Tunnel Surrounding Rock Containing Weak Intercalated Rock." Advanced Materials Research 168-170 (December 2010): 2543–47. http://dx.doi.org/10.4028/www.scientific.net/amr.168-170.2543.

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Weak intercalated rock plays an important role in the stability of engineering rock mass. It controls the mechanism of deformation and breakage of rocks. Systematic numerical tests have been carried out to study the stability of surrounding rock mass with different distributions of weak intercalated rock has been analyzed by the FEM software ABAQUS. All of the numerical modelings are plain-strain type with elasto-plastic constitutive law and Drucker-Prager failure criterion. Some quantificational results about the influence of weak intercalated rock are summarized, especially the influence on

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36

Zhao, Chongbin, and Qibo Liu. "Investigating Effects of Structural Deformation Regimes on Mineralization Distributions in Fluid-Saturated Rocks: Computational Simulation Approach through Generic Models." Minerals 13, no. 5 (2023): 664. http://dx.doi.org/10.3390/min13050664.

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Structural deformation regimes in the upper crust of the Earth can have significant effects on the distributions of pore-fluid flow in existing fissured and fractured zones, which are surrounded by fluid-saturated porous rocks. Based on the modern mineralization theory, mineralization distributions in ore-forming systems depend strongly on the distributions of pore-fluid flow velocity. Therefore, different structural deformation regimes associated with mineralization systems can remarkably affect mineralization distributions in existing fissured and fractured zones. This article utilizes a com

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Liu, Gang, Dongwei Wang, Yonglong Zan, Shengxuan Wang, and Qiqi Zhang. "Feasibility Study of Material Deformation and Similarity of Spatial Characteristics of Standard Coal Rocks." Processes 12, no. 3 (2024): 454. http://dx.doi.org/10.3390/pr12030454.

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The comparison between similar materials and original coal rock is the basis for similar simulation experiments in coal mines. The differences in mechanical properties, acoustic characteristics, and damage laws between similar materials and the original coal rock are of great significance for similar simulation research, to reveal objective laws. First, materials similar to coal rock with similar theoretical ratios were taken as the object of research, and the sand–cement ratio, the carbon paste ratio, and the water content were determined by multivariate linear regression to accurately match

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Zhang, Lei, Xufeng Wang, Zhijun Niu, and Jianbo Dai. "Simulation Analysis of the Influence of Amplitude on Deformation and Fracture Characteristics of Hard Rock under Ultrasonic Vibration Load." Processes 12, no. 1 (2023): 74. http://dx.doi.org/10.3390/pr12010074.

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The utilization of auxiliary tools employing ultrasonic high-frequency vibration to enhance rock breaking efficiency holds significant potential for application in underground hard rock excavation engineering. To investigate the failure mechanism of rocks under high frequency ultrasonic vibration load, this study employs particle flow software PFC2D for numerical simulation. By incorporating boundary conditions from actual ultrasonic vibration rock breaking experiments and utilizing a parallel bond model to construct the rock, we analyze the deformation, damage, fracture, and energy evolution

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Wang, Fengnian, Shizhuang Chen, Pan Gao, Zhibiao Guo, and Zhigang Tao. "Research on Deformation Mechanisms of a High Geostress Soft Rock Roadway and Double-Shell Grouting Technology." Geofluids 2021 (October 31, 2021): 1–13. http://dx.doi.org/10.1155/2021/6215959.

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In this study, the deformation characteristics and mechanical properties of coal and rock mass in the S2N5 working face of the Xiaokang coal mine are analyzed to address the problem of large deformation of soft rocks with high in situ stress surrounding roadways. Through a newly developed grouting pipe, a double-shell grouting technology, consisting of low-pressure grouting and high-pressure split grouting, is proposed for the Xiaokang coal mine. In addition, the effect of grouting is evaluated by borehole peeping and deformation monitoring. The results show that the double-shell grouting tech

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40

Grocholski, B. "Rock deformation goes magnetic." Science 353, no. 6307 (2016): 1509–10. http://dx.doi.org/10.1126/science.353.6307.1509-f.

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Roberts, J. L. "Principles of Rock Deformation." Journal of Structural Geology 9, no. 8 (1987): 1055–56. http://dx.doi.org/10.1016/0191-8141(87)90016-2.

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Kozyrev, A. A., V. I. Panin, V. A. Mal'tsev, M. V. Akkuratov, and V. V. Zakharov. "Laws of rock deformation." Journal of Mining Science 32, no. 1 (1996): 18–25. http://dx.doi.org/10.1007/bf02046573.

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Roeloffs, Evelyn. "Radon and rock deformation." Nature 399, no. 6732 (1999): 104–5. http://dx.doi.org/10.1038/20072.

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White, J. M. "Principles of rock deformation." Earth-Science Reviews 24, no. 4 (1987): 293–94. http://dx.doi.org/10.1016/0012-8252(87)90074-2.

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SINITSA, I. V., E. A. ERMOLOVICH, and S. D. YATSYNYAK. "PREDICTING THE STOPINGINFLUENCE ON THE STRESS-STRAINSTATE OF THE MASSIF IN THE DOWNCAST SHAFT AREA." News of the Tula state university. Sciences of Earth 2, no. 1 (2023): 418–31. http://dx.doi.org/10.46689/2218-5194-2023-2-1-418-431.

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This article gives an assessment of the stress-strain state of the rock massif in the area of the downcast shaft located in rocks. The development of geomechanical processes in the rock massif in the downcast shaft area is considered. The problem of continuum mechanics is applied in a flat setting, taking into account the influence of camera phased development. Deformation processes in rocks are realized by introducing into the numerical model an elastic-plastic model of rock deformation. This approach makes it possible to increase the reliability of the stress-strain state of the massif predi

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Zhao, Changzheng, Shenggen Cao, Shuyu Du, Chiyuan Che, and Xingyao Wang. "Failure Characteristics and Deformation Control Methods of the Bottom Drum of Roadways during Repeated Mining of Multiple Coal Seams." Geofluids 2022 (May 23, 2022): 1–14. http://dx.doi.org/10.1155/2022/3903370.

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As the problems of serious bottom drum and roadway broken surrounding rock are influenced by repeated mining in multiple coal seams, the factors affecting the surrounding rock deformation of a +980 m roadway in Faer coal mine by analyzing the rock composition and obtaining borehole video data are investigated. The mechanism of the overburden caving affected by repeated mining of multiple coal seams is analyzed theoretically, and the numerical simulation is conducted to evaluate the deformation mechanism of roadway bottom drum. A combined support technology is proposed consisting of bolts, anch

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Chepiga, Daria, Serhii Pakhomov, Vitalii Hnatyuk, Maksym Hryhorets, Yaroslav Liashok, and Serhii Podkopaiev. "Determining the deformation properties of crushed rock under compressive compression conditions." Eastern-European Journal of Enterprise Technologies 4, no. 1 (124) (2023): 85–95. http://dx.doi.org/10.15587/1729-4061.2023.284386.

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The object of this study is the process that forms fill materials from crushed rock under load for managing the condition of side rocks in a coal-bearing massif with preparatory workings. Deformation properties of crushed rock under laboratory conditions were evaluated on the basis of a study of compressive compression of the fill material. It was registered that there is a quadratic functional dependence between the change in the bulk density of crushed rock of different granulometric composition and the specific potential energy of deformation. It was experimentally established that the spec

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Fedotoval, Iuliia, Nikolay Kuznetcov, and Eduard Kasparyan. "Estimating the rockburst hazard of hard rocks based on laboratory test results." E3S Web of Conferences 129 (2019): 01008. http://dx.doi.org/10.1051/e3sconf/201912901008.

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The results of laboratory tests of samples are used to estimate rock proneness to dynamic fractures, in particular, by brittleness index. A common drawback of the approaches in use is that they do not expressly consider the main condition of dynamic rock fracture – rock mass ability to accumulate energy when loaded. The article discusses the results of studies of the nature of elastic energy accumulation during loading and deformation of samples of various rocks under uniaxial compression in order to assess the degree of their explosion. The approach is original as it studies the deformation c

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Xu, Jiahui, Guichen Li, Ruiyang Bi, Haoyu Rong, and Changlun Sun. "Explanation on the Abnormal Behavior during the Nanoindentation Holding Stages by Amplifying Oscillation." Advances in Civil Engineering 2022 (January 18, 2022): 1–11. http://dx.doi.org/10.1155/2022/8886965.

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Recently, the holding states of nanoindentation experiments have been widely used to analyze the time-dependent deformations of various rocks, and the dynamic mechanical analysis (DMA) method seems to be more applicable than the quasi-static mechanical analysis (QMA) method when the influence of creep deformation on mechanical properties of rocks was analyzed. However, the former method causes an abnormal behavior during the creep holding stages that was not clearly interpreted.2 Consequently, in this study, by amplifying the oscillation of the DMA method, the mechanical mechanism of this phen

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Ping, Yang, and Shu Chen Li. "Triaxial Compression Experimental Study on Post-Peak Deformation Characteristics of Rock Masses with Persistent Joints." Advanced Materials Research 1030-1032 (September 2014): 1074–77. http://dx.doi.org/10.4028/www.scientific.net/amr.1030-1032.1074.

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Controlling the stability of surrounding rocks in underground excavations during in-depth resource development must be confronted with post-peak deformation and failure problems of jointed rock masses. This paper describes routine triaxial compression testing on standard cylinder specimen with persistent joints in different inclinations and under different confining pressures, and analyzes deformation characteristics of rock masses with persistent joints in different inclinations and under different confining pressures. Test results show that the peak strength, residual strength, and peak stra

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