True triaxial test and PFC3D-GBM simulation study on mechanical properties and fracture evolution mechanisms of rock under high stresses
文献类型：期刊论文
| 作者 | Zheng, Zhi1,2,3; Tang, Hao1; Zhang, Qiang3; Pan, Pengzhi4; Zhang, Xiwei2; Mei, Guoxiong1; Liu, Zaobao2; Wang, Wei5 |
| 刊名 | COMPUTERS AND GEOTECHNICS
 |
| 出版日期 | 2023-02-01 |
| 卷号 | 154期号:-页码:- |
| ISSN号 | 0266-352X |
| 关键词 | True triaxial test 3D grain -based model Macro and micro -fracture characteristics Tensile -shear fracture mechanisms Fracture evolution processes B -value precursor analysis |
| 英文摘要 | After the excavation of deep underground engineering, the complex 3D high-stress redistribution occurs in the surrounding rock, resulting in deterioration of mechanical properties of surrounding rock and even strong brittle failure and catastrophe. However, the micromechanical mechanisms are not clear. Therefore, in this study, true triaxial laboratory tests and PFC3D numerical simulations are conducted on deeply buried marble, and a new 3DGBM numerical model method incorporating the mineral composition and grain size distribution characteristics of the marble and considering the contacts between and within mineral grains was proposed. The pre- and postdeformation, strength, macro- and micro-fracture characteristics, fracture evolution processes and tensile-shear fracture mechanisms of marble under different 02 and 03 were systematically investigated. In particular, the effects of 02 and 03 on the intergranular and transgranular micro-failure of mineral grains were analyzed; the microcrack anisotropic characteristics, microcrack propagation processes and tensile-shear mechanisms induced by true triaxial stresses (02, 03) were further studied; and the AE parameter b-value and magnitude M were realized in the proposed 3D-GBM to study the precursor characteristics of marble failure. Finally, the effects of the mineral grain size, particle number and specimen size on the mechanical properties and micro-failure mechanisms of marble were further explored. |
| 学科主题 | Computer Science ; Engineering ; Geology |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCI LTD |
| WOS记录号 | WOS:000900025000001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35488]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 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 2.Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University, Shenyang 110819, China 3.State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, China 4.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 5.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China |
| 推荐引用方式 GB/T 7714 | Zheng, Zhi,Tang, Hao,Zhang, Qiang,et al. True triaxial test and PFC3D-GBM simulation study on mechanical properties and fracture evolution mechanisms of rock under high stresses[J]. COMPUTERS AND GEOTECHNICS,2023,154(-):-. |
| APA | Zheng, Zhi.,Tang, Hao.,Zhang, Qiang.,Pan, Pengzhi.,Zhang, Xiwei.,...&Wang, Wei.(2023).True triaxial test and PFC3D-GBM simulation study on mechanical properties and fracture evolution mechanisms of rock under high stresses.COMPUTERS AND GEOTECHNICS,154(-),-. |
| MLA | Zheng, Zhi,et al."True triaxial test and PFC3D-GBM simulation study on mechanical properties and fracture evolution mechanisms of rock under high stresses".COMPUTERS AND GEOTECHNICS 154.-(2023):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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