Numerical study of unstable failure behavior in heterogeneous rock pillar
文献类型：期刊论文
| 作者 | Zhang, Shirui1,3; Qiu, Shili1; Jiang, Quan1; Wang, Ben1,3; Hu, Xunjian2; Zhang, Hao1 |
| 刊名 | ENGINEERING FRACTURE MECHANICS
 |
| 出版日期 | 2023-09-27 |
| 卷号 | 290页码:20 |
| 关键词 | Rock pillar Heterogeneity FDEM Unstable failure evaluation Loading system stiffness (LSS) |
| ISSN号 | 0013-7944 |
| DOI | 10.1016/j.engfracmech.2023.109529 |
| 英文摘要 | Strain bursting in deep-buried tunnels is a common engineering disaster closely related to the failure mechanism and loading system stiffness (LSS). The rock failure mechanism cannot be explicitly captured using the homogeneous model. In this study, the failure characteristics of heterogeneous rock pillars under different LSS were simulated using the combined finite-discrete element method (FDEM), and the grain-based model in FDEM was constructed using a C++ subroutine. The simulation results show that with the decrease of the LSS, the post-peak stressstrain curve of the specimen slows down, the specimen undergoes unstable failure, and the fragmentation degree of the specimen, released kinetic energy, and post-peak crack increase rate grow. Under soft loading conditions, rock heterogeneity is an important factor affecting the degree of rock failure. The ratio of shear cracks to tensile cracks, strain energy of the loading system (LSSE), and post-peak crack increase rate can be regarded as indicators for distinguishing between stable and unstable failure of rocks. Furthermore, by comprehensively considering the LSS, rock heterogeneity and failure phenomena, an empirical index for evaluating the degree of rock failure was proposed. |
| 资助项目 | National Natural Science Foundation of China[52279117] ; National Natural Science Foundation of China[42102266] ; [51979268] |
| WOS研究方向 | Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001058886100001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/39289]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Qiu, Shili |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Zhejiang Univ, Res Ctr Coastal & Urban Geotech Engn, Hangzhou 310058, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Shirui,Qiu, Shili,Jiang, Quan,et al. Numerical study of unstable failure behavior in heterogeneous rock pillar[J]. ENGINEERING FRACTURE MECHANICS,2023,290:20. |
| APA | Zhang, Shirui,Qiu, Shili,Jiang, Quan,Wang, Ben,Hu, Xunjian,&Zhang, Hao.(2023).Numerical study of unstable failure behavior in heterogeneous rock pillar.ENGINEERING FRACTURE MECHANICS,290,20. |
| MLA | Zhang, Shirui,et al."Numerical study of unstable failure behavior in heterogeneous rock pillar".ENGINEERING FRACTURE MECHANICS 290(2023):20. |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。