Three-dimensional stress variation characteristics in deep hard rock of CJPL-II project based on in-situ monitoring
文献类型：期刊论文
| 作者 | Zheng, Minzong2; Li, Shaojun1,2; Feng, Zejie1,2; Xu, Huaisheng1,2; Xiao, Yaxun1,2 |
| 刊名 | INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
 |
| 出版日期 | 2024-02-01 |
| 卷号 | 34期号:2页码:179-195 |
| 关键词 | Disturbance stress Tensor distance Stress disturbance index Principal stress direction Underground research laboratory |
| ISSN号 | 2095-2686 |
| DOI | 10.1016/j.ijmst.2023.12.007 |
| 英文摘要 | In deep hard rock excavation, stress plays a pivotal role in inducing stress-controlled failure. While the impact of excavation-induced stress disturbance on rock failure and tunnel stability has undergone comprehensive examination through laboratory tests and numerical simulations, its validation through insitu stress tests remains unexplored. This study analyzes the three-dimensional stress changes in the surrounding rock at various depths, monitored during the excavation of B2 Lab in China Jinping Underground Laboratory Phase II (CJPL-II). The investigation delves into the three-dimensional stress variation characteristics in deep hard rock, encompassing stress components and principal stress. The results indicate changes in both the magnitude and direction of the principal stress during tunnel excavation. To quantitatively describe the degree of stress disturbance, a series of stress evaluation indexes are established based on the distances between stress tensors, including the stress disturbance index (SDI), the principal stress magnitude disturbance index (SDIm), and the principal stress direction disturbance index (SDId). The SDI indicates the greatest stress disturbance in the surrounding rock is 4.5 m from the tunnel wall in B2 Lab. SDIm shows that the principal stress magnitude disturbance peaks at 2.5 m from the tunnel wall. SDId reveals that the largest change in principal stress direction does not necessarily occur near the tunnel wall but at a specific depth from it. The established relationship between SDI and the depth of the excavation damaged zone (EDZ) can serve as a criterion for determining the depth of the EDZ in deep hard rock engineering. Additionally, it provides a reference for future construction and support considerations. (c) 2024 Published by Elsevier B.V. on behalf of China University of Mining & Technology. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
| 资助项目 | National Natural Science Foundation of China[42202320] ; National Natural Science Foundation of China[42102266] ; Open Project of Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education[LKF201901] ; Yalong River Hydropower Development Co., Ltd. |
| WOS研究方向 | Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:001265645900001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/41963]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Li, Shaojun |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, Minzong,Li, Shaojun,Feng, Zejie,et al. Three-dimensional stress variation characteristics in deep hard rock of CJPL-II project based on in-situ monitoring[J]. INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY,2024,34(2):179-195. |
| APA | Zheng, Minzong,Li, Shaojun,Feng, Zejie,Xu, Huaisheng,&Xiao, Yaxun.(2024).Three-dimensional stress variation characteristics in deep hard rock of CJPL-II project based on in-situ monitoring.INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY,34(2),179-195. |
| MLA | Zheng, Minzong,et al."Three-dimensional stress variation characteristics in deep hard rock of CJPL-II project based on in-situ monitoring".INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY 34.2(2024):179-195. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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