Anisotropic failure evaluation and microcracking evolution discrete element simulation of rock discontinuities
Abstract The stability of slopes and tunnels is controlled by rock discontinuities, and the rock discontinuities roughness and the sliding direction play a significant role in shear failure. However, three-dimensional roughness evaluation considering shear directions is scare, and the internal shear...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-07-01
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| Series: | International Journal of Coal Science & Technology |
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| Online Access: | https://doi.org/10.1007/s40789-025-00776-3 |
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| _version_ | 1849767474642288640 |
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| author | Zhi Zheng Shouxin Li Benguo He Chuanqi Zhu Qiang Zhang Yaohui Gao Shengjie Di |
| author_facet | Zhi Zheng Shouxin Li Benguo He Chuanqi Zhu Qiang Zhang Yaohui Gao Shengjie Di |
| author_sort | Zhi Zheng |
| collection | DOAJ |
| description | Abstract The stability of slopes and tunnels is controlled by rock discontinuities, and the rock discontinuities roughness and the sliding 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 geometric 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. |
| format | Article |
| id | doaj-art-2e38942ca65c42b39e93a336242916f6 |
| institution | DOAJ |
| issn | 2095-8293 2198-7823 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | International Journal of Coal Science & Technology |
| spelling | doaj-art-2e38942ca65c42b39e93a336242916f62025-08-20T03:04:11ZengSpringerOpenInternational Journal of Coal Science & Technology2095-82932198-78232025-07-0112113710.1007/s40789-025-00776-3Anisotropic failure evaluation and microcracking evolution discrete element simulation of rock discontinuitiesZhi Zheng0Shouxin Li1Benguo He2Chuanqi Zhu3Qiang Zhang4Yaohui Gao5Shengjie Di6Key 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 UniversityKey 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 UniversityKey Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern UniversityState Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal MinesState Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower ResearchPowerChina Huadong Engineering Corporation LimitedPowerChina Northwest Engineering Corporation LimitedAbstract The stability of slopes and tunnels is controlled by rock discontinuities, and the rock discontinuities roughness and the sliding 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 geometric 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.https://doi.org/10.1007/s40789-025-00776-3Rock discontinuitiesDirect shear testAnisotropic failure evaluationDiscrete element simulation3D grain-based modelPrecursor analysis |
| spellingShingle | Zhi Zheng Shouxin Li Benguo He Chuanqi Zhu Qiang Zhang Yaohui Gao Shengjie Di Anisotropic failure evaluation and microcracking evolution discrete element simulation of rock discontinuities International Journal of Coal Science & Technology Rock discontinuities Direct shear test Anisotropic failure evaluation Discrete element simulation 3D grain-based model Precursor analysis |
| title | Anisotropic failure evaluation and microcracking evolution discrete element simulation of rock discontinuities |
| title_full | Anisotropic failure evaluation and microcracking evolution discrete element simulation of rock discontinuities |
| title_fullStr | Anisotropic failure evaluation and microcracking evolution discrete element simulation of rock discontinuities |
| title_full_unstemmed | Anisotropic failure evaluation and microcracking evolution discrete element simulation of rock discontinuities |
| title_short | Anisotropic failure evaluation and microcracking evolution discrete element simulation of rock discontinuities |
| title_sort | anisotropic failure evaluation and microcracking evolution discrete element simulation of rock discontinuities |
| topic | Rock discontinuities Direct shear test Anisotropic failure evaluation Discrete element simulation 3D grain-based model Precursor analysis |
| url | https://doi.org/10.1007/s40789-025-00776-3 |
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