Rock fracturing observation based on microseismic monitoring and borehole imaging: In situ investigation in a large underground cavern under high geostress
文献类型：期刊论文
| 作者 | Zhao, Jin-Shuai2,3; Jiang, Quan3; Lu, Jian-Fei2; Chen, Bing-Rui3; Pei, Shu-Feng3; Wang, Zhi-Lin1 |
| 刊名 | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
 |
| 出版日期 | 2022-08-01 |
| 卷号 | 126期号:-页码:- |
| 关键词 | Microseismic monitoring Digital panoramic borehole camera Rock fracturing Large cavern excavation Brittle failure |
| ISSN号 | 0886-7798 |
| 英文摘要 | During the excavation of deep rock engineering projects under high geostress, the brittle failure of hard rock often occurs. To understand the excavation-induced fracturing process of the surrounding rock of a large underground powerhouse, in situ observation schemes have been proposed, including microseismic (MS) monitoring, imaging with a digital panoramic borehole camera, multipoint extensometer measurements and on-site surrounding rock failure investigation. First, a MS system is used to capture the microfractures inside the rock mass, revealing the potential high-risk failure regions. The spatial distribution of MS events shows that the excavation-induced MS events are progressively clustered in the upstream spandrel and downstream foot of the powerhouse, approximately parallel to the direction of the maximum principal stress. Second, the digital panoramic borehole camera and multipoint extensometer are arranged in the high-risk region to further reflect the rock mass fracture evolution and deformation response characteristics in the monitored section. The borehole camera observations of the top arch and sidewall indicate that the excavation unloading not only causes surrounding rock fracturing near the periphery of the cavern but also induces deep fracturing at a certain depth from the periphery of the cavern. From these comprehensive observation results, the mechanism of rock mass mechanical behaviour is clarified; that is, the macroscopic deformation or failure characteristics of the surrounding rock are directly related to the evolution of microfractures. The research results of this paper are valuable for the stability analysis and excavation optimization of similar underground caverns. |
| 学科主题 | Construction & Building Technology ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000800212900002 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35176]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.China Three Gorges Corporation, Beijing 100038, China 2.Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang 212013, China 3.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China |
| 推荐引用方式 GB/T 7714 | Zhao, Jin-Shuai,Jiang, Quan,Lu, Jian-Fei,et al. Rock fracturing observation based on microseismic monitoring and borehole imaging: In situ investigation in a large underground cavern under high geostress[J]. TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,2022,126(-):-. |
| APA | Zhao, Jin-Shuai,Jiang, Quan,Lu, Jian-Fei,Chen, Bing-Rui,Pei, Shu-Feng,&Wang, Zhi-Lin.(2022).Rock fracturing observation based on microseismic monitoring and borehole imaging: In situ investigation in a large underground cavern under high geostress.TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,126(-),-. |
| MLA | Zhao, Jin-Shuai,et al."Rock fracturing observation based on microseismic monitoring and borehole imaging: In situ investigation in a large underground cavern under high geostress".TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY 126.-(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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