Anisotropic failure evaluation and microcracking evolution discrete element simulation of rock discontinuities
Zhi Zheng1
Shouxin Li2
Benguo He3
Chuanqi Zhu4
Qiang Zhang5
Yaohui Gao6
Shengjie Di7
1.Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education,Guangxi Key Laboratory of Disaster Prevention and Engineering Safety,College of Civil Engineering and Architecture,Guangxi University,Nanning 530004,Guangxi,China;State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research,Beijing 100080,China;Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines,Northeastern University,Shenyang 110819,China2.Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education,Guangxi Key Laboratory of Disaster Prevention and Engineering Safety,College of Civil Engineering and Architecture,Guangxi University,Nanning 530004,Guangxi,China3.Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines,Northeastern University,Shenyang 110819,China4.State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines,Huainan 232001,Anhui,China5.State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research,Beijing 100080,China6.PowerChina Huadong Engineering Corporation Limited,Hangzhou 310014,Zhejiang,China7.PowerChina Northwest Engineering Corporation Limited,Xi'an 710065,China
摘要：The stability of slopes and tunnels is controlled by rock discontinuities,and the rock discontinuities roughness and the slid-ing direction play a significant role in shear failure.However,three-dimensional roughness evaluation considering shear directions is scare,and the internal shear fracturing processes,micromechanical mechanisms and failure precursor of rock discontinuities are not well understood.Therefore,this study proposes a novel roughness evaluation index to quantitatively analyze the anisotropic characteristics of rock discontinuities.In conjunction with shear tests,a novel 3D-GBM modelling method considering the micromineral constituent and particle size distribution characteristics of granite as well as the geo-metric shape of discontinuities was realized.The strength,macro and micro-fracture characteristics,visual anisotropic shear evolution process and microfailure mechanism of granite discontinuities at different roughness and shear direction were investigated.Finally,the spatial and temporal evolutions of AE parameter b-value and magnitude M were further analyzed to reveal the shear fracture precursor of granite discontinuities.
机标关键词：simulationevaluationevolutionelementrockanisotropicdiscontinuitiesdiscrete
论文发表日期：2025-10-31
在线出版日期：2026-01-31（本平台首次上网日期，不代表文献的发表时间）
页数：37( 127-163 )
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