Failure mechanisms and damage evolution of hard rock joints under high stress: Insights from PFC2D modeling
文献类型：期刊论文
| 作者 | Meng, Fanzhen3; Song, Jie3; Yue, Zhufeng3; Zhou, Hui2; Wang, Xiaoshan3; Wang, Zaiquan1,3 |
| 刊名 | ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
 |
| 出版日期 | 2022-02-01 |
| 卷号 | 135页码:394-411 |
| 关键词 | PFC modeling rough joint high normal stress crack development contact force |
| ISSN号 | 0955-7997 |
| DOI | 10.1016/j.enganabound.2021.12.007 |
| 英文摘要 | Rock joints can be subjected to high normal stress in deep rock projects such as deep mining, tunnelling, and oil and gas exploitation. The spatial and temporal damage evolution and distribution of rock joints cannot be directly observed due to the opaque nature of rocks. Discrete element modeling provides a good alternative solution to visualize the development of micro-cracks under complex geological conditions. In this study, 2D Particle Flow Code (PFC) modelling is conducted to shed light on the failure mechanism and damage evolution of hard rock joints, especially under high stress. The influence of normal stress, initial joint roughness and grain size on the shear behavior and micro-damage are examined, and the spatial and temporal distribution of micro-cracks are also compared and quantified. Results indicate that more cracks develop for a joint sheared under a higher normal stress, and a rougher joint also tends to generate more cracks. On the other hand, the spatial distribution of shear-induced micro-cracks becomes more unevenly distributed with increasing normal stress and roughness. Three stages, namely slow increase, fast increase and slow increase can be divided on the temporal cumulative crack development curve. The micro-cracks grow faster in the fast growth stage for a rougher joint sheared under a higher normal stress, which is consistent with the acoustic emission monitoring in the laboratory direct shear tests. Both peak shear strength and damage zone size are affected by the particle size, which is closely associated with the more interlocked effect of large grains on the two sides of the shear interface. The maximum length of the crack is dependent on the magnitude of contact force, rather than the shear displacement, and the maximum contact force tends to be larger for the rougher joint. |
| 资助项目 | National Natural Science Foundation of China[51879135] ; National Natural Science Foundation of China[51808306] ; Key projects of the Yalong River Joint Fund of the National Natural Science Foundation of China[U1865203] ; Taishan Scholars Program[2019KJG002] ; Taishan Scholars Program[2019RKB01083] ; Natural Science Foundation of Shandong Province[ZR2019BEE051] |
| WOS研究方向 | Engineering ; Mathematics |
| 语种 | 英语 |
| WOS记录号 | WOS:000748563500001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/34397]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Zhou, Hui; Wang, Zaiquan |
| 作者单位 | 1.Cooperat Innovat Ctr Engn Construct & Safety Shan, Qingdao, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China 3.Qingdao Univ Technol, Coll Sci, Qingdao 266033, Shandong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Meng, Fanzhen,Song, Jie,Yue, Zhufeng,et al. Failure mechanisms and damage evolution of hard rock joints under high stress: Insights from PFC2D modeling[J]. ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS,2022,135:394-411. |
| APA | Meng, Fanzhen,Song, Jie,Yue, Zhufeng,Zhou, Hui,Wang, Xiaoshan,&Wang, Zaiquan.(2022).Failure mechanisms and damage evolution of hard rock joints under high stress: Insights from PFC2D modeling.ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS,135,394-411. |
| MLA | Meng, Fanzhen,et al."Failure mechanisms and damage evolution of hard rock joints under high stress: Insights from PFC2D modeling".ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS 135(2022):394-411. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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