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International Journal of Minerals,Metallurgy and Materials 2009年第1期16卷 12-18页

作者： Xing-ping Lai Fen-hua Ren Yong-ping Wu Mei-feng Cai Energy School Xi＇an University of Science ＆ Technology Xi＇an 710054 China School of Civil and Environmental Engineering University of Science and Technology Beijing Beijing 100083 China Key Laboratory of Western Mine ＆ Hazard Prevention China Ministry of Education Xi＇an 710054 China

The damage process of fractured rock mass showed that the fracture in rocks induced roof collapse in Yangchangwan Coal Mine, China. The rock mass was particularly weak and fractured. There occurred 6 large-scale dynamical roof falls in the excavation disturbed zone （EDZ） with the collapsing volume of 216 m^3. First, the field detailed geological environment, regional seismic dynamics, and dynamic instability of roadways were generally investigated. Second, the field multiple-index monitoring measurements for detecting the deep delamination of the roof, convergence deformation, bolt-cable load, acoustic emission （AE） characteristic parameters, total AE events, AE energy-releasing rate, rock mass fracture, and damage were arranged. Finally, according to the time-space-strength relations, a quantitative assessment of the influence of rock-mass damage on the dynamic roof instability was accomplished.

关键词： fractured rock mass excavation disturbed zone (EDZ) roof collapse acoustic emission (AE) quantitative assessment

Numerical manifold method for thermo-mechanical coupling simulation of fractured rock mass

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Journal of rock Mechanics and Geotechnical Engineering 2024年第6期16卷 1977-1992页

作者： Jiawei Liang Defu Tong Fei Tan Xiongwei Yi Junpeng Zou Jiahe Lv Faculty of Engineering China University of GeosciencesWuhan430074China Department of Civil Engineering Monash UniversityClaytonVIC3800Australia Badong National Observation and Research Station of Geohazards China University of GeoscienceWuhan430074China

As a calculation method based on the Galerkin variation,the numerical manifold method(NMM)adopts a double covering system,which can easily deal with discontinuous deformation problems and has a high calculation *** at the thermo-mechanical(TM)coupling problem of fractured rock masses,this study uses the NMM to simulate the processes of crack initiation and propagation in a rock mass under the influence of temperature field,deduces related system equations,and proposes a penalty function method to deal with boundary *** examples are employed to confirm the effectiveness and high accuracy of this *** the thermal stress analysis of a thick-walled cylinder(TWC),the simulation of cracking in the TWC under heating and cooling conditions,and the simulation of thermal cracking of the SwedishÄspöPillar Stability Experiment(APSE)rock column,the thermal stress,and TM coupling are *** numerical simulation results are in good agreement with the test data and other numerical results,thus verifying the effectiveness of the NMM in dealing with thermal stress and crack propagation problems of fractured rock masses.

关键词： Heat conduction fractured rock mass Crack propagation Galerkin variation Numerical manifold method(NMM)

Coupled hydro-mechanical effect of a fractured rock mass under high water pressure

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Journal of rock Mechanics and Geotechnical Engineering 2012年第1期4卷 88-96页

作者： Zhongming Jiang Shurong Feng Sheng Fu School of Hydraulic Engineering Changsha University of Science and TechnologyChangsha410114China HydroChina Zhongnan Engineering Corporation Changsha410004China

To explore the variation of permeability and deformation behaviors of a fractured rock mass in high water pressure,a high pressure permeability test（HPPT）,including measuring sensors of pore water pressure and displacement of the rock mass,was designed according to the hydrogeological condition of Heimifeng pumped storage power *** the assumption of radial water flow pattern in the rock mass during the HPPT,a theoretical formula was presented to estimate the coefficient of permeability of the rock mass using water pressures in injection and measuring *** variation in permeability of the rock mass with the injected water pressure was studied according to the suggested *** fitting the relationship between the coefficient of permeability and the injected water pressure,a mathematical expression was obtained and used in the numerical *** a better understanding of the relationship between the pore water pressure and the displacement of the rock mass,a 3D numerical method based on a coupled hydro-mechanical theory was employed to simulate the response of the rock mass during the *** comparison of the calculated and measured data of pore water pressure and displacement,the deformation behaviors of the rock mass were *** is shown that the variation of displacement in the fractured rock mass is caused by water flow passing through it under high water pressure,and the rock deformation during the test could be calculated by using the coupled hydro-mechanical model.

关键词： fractured rock mass permeability under the condition of high water head hydro-mechanical coupling effect

Effects of fracture distribution and length scale on the equivalent continuum elastic compliance of fractured rock masses

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Journal of rock Mechanics and Geotechnical Engineering 2015年第6期7卷 626-637页

作者： Marte Gutierrez Dong-Joon Youn Department of Civil and Environmental Engineering Colorado School of Mines Department of Civil Infrastructure and Environmental Engineering Khalifa University

Fracture systems have strong influence on the overall mechanical behavior of fractured rock masses dueto their relatively lower stiffness and shear strength than those of the rock matrix. Understanding theeffects of fracture geometrical distribution, such as length, spacing, persistence and orientation, isimportant for quantifying the mechanical behavior of fractured rock masses. The relation betweenfracture geometry and the mechanical characteristics of the fractured rock mass is complicated due tothe fact that the fracture geometry and mechanical behaviors of fractured rock mass are stronglydependent on the length scale. In this paper, a comprehensive study was conducted to determine theeffects of fracture distribution on the equivalent continuum elastic compliance of fractured rock massesover a wide range of fracture lengths. To account for the stochastic nature of fracture distributions, threedifferent simulation techniques involving Oda＇s elastic compliance tensor, Monte Carlo simulation （MCS）,and suitable probability density functions （PDFs） were employed to represent the elastic compliance offractured rock masses. To yield geologically realistic results, parameters for defining fracture distributionswere obtained from different geological fields. The influence of the key fracture parameters andtheir relations to the overall elastic behavior of the fractured rock mass were studied and discussed. Adetailed study was also carried out to investigate the validity of the use of a representative elementvolume （REV） in the equivalent continuum representation of fractured rock masses. A criterion was alsoproposed to determine the appropriate REV given the fracture distribution of the rock mass.

关键词： fractured rock mass Equivalent continuum elastic compliance Monte Carlo simulation(MCS) Representative element volume(REV) Scale effects

Mechanism of progressive failure of a slope with a steep joint under the action of freezing and thawing:model test

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Journal of Mountain Science 2022年第10期19卷 2999-3012页

作者： LI Cong ZHANG Rong-tang ZHU Jie-bing LU Bo SHEN Xiao-ke WANG Xiao-wei LIU Jie-sheng WU Liang-liang ZHANG Xin-zhou School of Civil Engineering and Architecture Wuhan Polytechnic UniversityWuhan 430023China Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources Changjiang River Scientific Research InstituteWuhan 430010China Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering Hohai UniversityNanjing 210098China

The stability of slope rock masses is influenced by freeze-thaw cycles in cold region,and the mechanism of stability deterioration is not *** order to understand the damage and progressive failure characteristics of rock masses under the action of freezing and thawing,a model test was conducted on slope with steep joint in this *** temperature,frost heaving pressure and deformation of slope rock mass were monitored in real-time during the test and the progressive failure mode was *** experimental results show that the temperature variations of cracking and the rock mass of a slope are *** are obvious latent heat stages in the temperature-change plot in the crack,but not in the slope rock *** frost heaving effect in the fracture is closely related to the constraint conditions,which change with the deformation of the *** frost heaving pressure fluctuates periodically during freezing and continues to decrease during *** surface deformation of the rock mass increases during freezing,and the deformation is restored when it ***-thaw cycling results in residual deformation of the rock mass which cannot be fully *** shows that the rock mass at the free side of the steep-dip joint rotates slightly under the frost heaving effect,causing fracture *** fracture propagation pattern is a circular arc at the beginning,then extends to the possible sliding direction of the rock *** heaving force and fracture water pressure are the key factors for the failure of the slope,which can cause the crack to penetrate the rock mass,and a landslide ensues when the overall anti-sliding resistance of the rock mass is overcome.

关键词： rock slope fractured rock mass Freeze-thaw cycle Model experiment Stability degradation mechanism Failure mode

Application and prospects of 3D printing in physical experiments of rock mass mechanics and engineering:materials,methodologies and models

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International Journal of Coal Science & Technology 2023年第1期10卷 1-17页

作者： Qingjia Niu Lishuai Jiang Chunang Li Yang Zhao Qingbiao Wang Anying Yuan State Key Laboratory of Mining Disaster Preventionand Control Shandong University of Scienceand TechnologyQingdao 266590China State Key Laboratory of Mining Response and DisasterPrevention and Control in Deep Coal Mines AnhuiUniversity of Science and TechnologyHuainan 232001China College of Resources Shandong University of Scienceand TechnologyTaian 271019China

The existence of joints or other kinds of discontinuities has a dramatic efect on the stability of rock excavations and *** a result,a great challenge in rock mass mechanics testing is to prepare rock or rock-like samples with *** recent years,3D printing technology has become a promising tool in the feld of rock mass mechanics and *** study frst reviews and discusses the research status of traditional test methods in rock mass mechanics tests of making rock samples with ***,based on the comprehensive analysis of previous research,the application of 3D printing technology in rock mass mechanics is expounded from the following three *** frst is the printing *** there are many materials for 3D printing,it has been found that 3D printing materials that can be used for rock mass mechanics research are very *** research,we summarize and evaluate printing material that can be used for rock mass mechanics *** second is the printing methodology,which mainly introduces the current application forms of 3D printing technology in rock mass *** includes printed precise casting molds and one-time printed *** last one is the printing model,which includes small-scale samples for mechanical tests and large-scale physical ***,the benefts and drawbacks of using 3D printing samples in mechanical tests and the validity of their simulation of real rock are *** with traditional rock samples collected in nature or synthetic rock-like samples,the samples made by 3D printing technology have unique advantages,such as higher test repeatability,visualization of rock internal structure and stress *** is thus great potential for the use of 3D printing in the feld of rock mass ***,3D printing materials also have shortcomings,such as insufcient material strength and accuracy at this ***,the application prospect of 3D printing technology in

关键词： 3D printing rock mass mechanics Prefabricated cracks rock-like material fractured rock mass

Investigating the permeability of fractured rock masses and the origin of water in a mine tunnel in Shandong Province,China

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Investigating the permeability of fractured rock masses and ...

Stress wave propagation and incompatible deformation mechanisms in rock discontinuity interfaces in deep-buried tunnels

中国科学院地质与地球物理研究所2015年度（第15届）学术年会

作者： Jie Guo Haijun Zhao Fengshan Ma Kepeng Li Chunhu Zhao Key Laboratory of Shale Gas and Geoengineering Institute of Geology and GeophysicsChinese Academy of Sciences XI' an Research Institute of China Coal Technology & Engineering Group Corp.

The coastal Sanshandao mine is threatened by the overlying Quaternary water and *** an introduction to the geology and hydrogeological conditions in the mine area,a detailed hydrogeological survey and sampling were conducted and hydrochemical and stable isotopic(δ H andδO)tests on various waters were carried out to characterize the origin of water in the mine *** and statistical analysis indicated that the northwest-trending fractures with large dip angles and long trace lengths are well developed in the northeast compared with those in the southwest of the *** permeability coefficients of the rock masses are in the range 4.19×10-2.25×10m/s,indicating that the fractured rock masses have generally low *** seepage water had higher values of EC,total dissolved solids,and concentrations of most elements than the seawater and saline ***,the isotope composition of the waters indicated that the seepage water was more isotopically enriched than seawater but less than *** proportions of the three different sources were calculated based on hydrochemical and isotopic ***,the mine water was composed of 72%seawater,14.8%brine,and 13.2%atmospheric precipitation,***,some preventive measures are essential to avoid the probability of seawater inrush.

关键词： fractured rock mass isotope ratio permeability tensor Sanshandao mine water seepage

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Deep Underground Science and Engineering 2022年第1期1卷 25-39页

作者： Cong Zhang Zhende Zhu Shanyong Wang Xuhua Ren Chong Shi State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai UniversityNanjingChina Priority Research Center for Geotechnical Science and Engineering The University of NewcastleCallaghanNew South WalesAustralia Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering Hohai UniversityNanjingChina

Complex weak structural planes and fault zones induce significant heterogeneity,discontinuity,and nonlinear characteristics of a rock *** an earthquake occurs,these characteristics lead to extremely complex seismic wave propagation and vibrational behaviors and thus pose a huge threat to the safety and stability of deep buried *** investigate the wave propagation in a rock mass with different structural planes and fault zones,this study first introduced the theory of elastic wave propagation and elastodynamic principles and used the Zoeppritz equation to describe wave field decomposition and develop a seismic wave response model ***,a physical wave propagation model was constructed to investigate seismic waves passing through a fault,and dynamic damage was analyzed by using shaking table ***,stress wave attenuation and dynamic incompatible deformation mechanisms in a rock mass with fault zones were *** results indicate that under the action of weak structural planes,stress waves appear as a complex wave field decomposition *** a stress wave spreads to a weak structural plane,its scattering may transform into a tensile wave,generating tensile stress and destabilizing the rock mass;wave dynamic energy is absorbed by a low-strength rock through wave scattering,which significantly weakens the seismic *** propagation accelerates the initiation and expansion of internal defects in the rock mass and leads to a dynamic incompatible *** is one of the main causes for large deformation and even instability within rock *** findings provide an important reference and guide with respect to stability analysis of rock mass with weak structural planes and fault zones.

关键词： deep-buried tunnels fractured rock mass incompatible deformation mechanism rock interfaces stress wave propagation model

Equivalent Continuum Model of rock mass with Arbitrary Fractures

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Journal of Shanghai Jiaotong university(Science) 2013年第3期18卷 293-297页

作者： WANG Ying-yi LI Ke HUANG Xing-chun Chinese Underwater Technology Institute Shanghai Jiaotong University Shanghai 200231 China School of Naval Architecture Ocean and Civil Engineering Shanghai Jiaotong University Shanghai 200240 China China Merchants Chongqing Communications Research & Design Institute Co. Ltd. Chongqing 400067 China

The constitutive model and equivalent deformation modulus of an arbitrary column in representative elementary volume （REV） of fractured rock mass are derived. The deformation of fractured rock mass is com- posed of the rock part and the fracture part. The elasto-visco-plastic property is considered in this model. For the convenience in engineering practice, the complex elasto-visco-plastic model and its equivalent modulus are degraded, and tbe rock is taken as an elastic body. By statistical analysis of the geometric positions of the column and the fracture, the equivalent modulus of rock mass with arbitrary fractures is obtained.

关键词： fractured rock mass representative elementary volume (REV) elasto-visco-plastic constitutive model eouivalent continuum model

Effect of fissure water on mechanical characteristics of rock mass

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Mining Science and Technology 2010年第6期20卷 846-849页

作者： ZHANG Haibo ZHANG Wei LV Lei FENG Yan State Key Laboratory of Geomechanics and Deep Underground Engineering China University of Mining & Technology Xuzhou 221008 China Airfield Engineering Department Xuzhou Air Force College Xuzhou 221000 China

In view of the effect of fissure water in fractured rock mass on the strength of rock mass in engineering projects, we pre-pared specimens of cement mortar to simulate saturated rock mass with continuous fractures of different slope angles. By exerting static and dynamic loads on the specimens, the mechanical characteristics of rock mass with fissure water under these loads can be analyzed. Our experimental results indicate that the static compressive strength of saturated fractured rock mass is related to the slope angle. The lowest compressive strength of fractured rock mass occurs when the slope angle is 45°, while the highest strength occurs when the specimen has no fractures. Fissure water can weaken the strength of rock mass. The softening coefficient does not vary with the slope angle and type of load. The hydrodynamic pressure of fractured rock mass gradually increases with an increase in dynamic load. For a 0° slope angle, the hydrodynamic pressure reaches its highest level. When the slope angle is 90°, the hydro-dynamic pressure is the lowest.

关键词： fractured rock mass simulation fissure water SHPB hydrodynamic pressure