Spalling failure of deep hard rock caverns
文献类型：期刊论文
| 作者 | Su, Guoshao2,3,4; Chen, Yanxiang2; Jiang, Quan1; Li, Chongjin2; Cai, Wei2 |
| 刊名 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
 |
| 出版日期 | 2023-08-01 |
| 卷号 | 15期号:8页码:2083-2104 |
| 关键词 | Spalling failure Hard rock Cavern Tunnel Rock test Numerical simulation |
| ISSN号 | 1674-7755 |
| DOI | 10.1016/j.jrmge.2022.11.021 |
| 英文摘要 | Spalling is a typical brittle failure phenomenon of hard rock in deep caverns under high geostress. In this study, key issues are systematically studied concerning the spalling failure of deep hard rock caverns. First, the prismatic rock specimens with small thicknesses (i.e. width x thickness x height: 20 mm x 50 mm x 100 mm) are employed in our tests which not only successfully simulate the spalling failure of hard rock in the laboratory but also obtain a reasonable spalling strength similar to that of the rock mass. Then, a series of spalling experiments is carried out to investigate the mechanism of spalling failure of deep hard rock caverns. Our results show that the intermediate principal stress, weak dynamic disturbances, and rock microstructure have significant effects on the spalling failure. The spalling strength is approximately (0.3-0.8)UCS, where UCS is the uniaxial compressive strength of the cylindrical rock sample with a diameter of around 50 mm. The spalling strength increases first and then decreases with increasing intermediate principal stress. Moreover, an empirical spalling strength criterion and a numerical method of spalling failure are proposed. This numerical method can not only simulate the spalling failure zone formed by tangential compressive stress concentration after excavation under different intermediate principal stresses, but also successfully simulate the failure transition from tensile mode to shear mode associated with confinement change in deep hard rock caverns. Furthermore, an acoustic emission-based early warning method using neural network is proposed to predict the spalling failure. Finally, a technical roadmap for preventing and controlling spalling failure of deep hard rock caverns is presented after summarizing the successful experiences in a typical engineering case. (C) 2023 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V. 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[52169021] ; National Natural Science Foundation of China[51869003] ; Interdisciplinary Scientific Research Foundation of Guangxi University, China[2022JCA004] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001070903400014 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/39576]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Li, Chongjin |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Guangxi Univ, Minist Educ, Key Lab Disaster Prevent & Struct Safety, Nanning 530004, Peoples R China 3.Guangxi Univ, Guangxi Prov Engn Res Ctr Water Secur Intelligent, Nanning 530004, Peoples R China 4.Guangxi Univ, Guangxi Key Lab Disaster Prevent & Engn Safety, Nanning 530004, Peoples R China |
| 推荐引用方式 GB/T 7714 | Su, Guoshao,Chen, Yanxiang,Jiang, Quan,et al. Spalling failure of deep hard rock caverns[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2023,15(8):2083-2104. |
| APA | Su, Guoshao,Chen, Yanxiang,Jiang, Quan,Li, Chongjin,&Cai, Wei.(2023).Spalling failure of deep hard rock caverns.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,15(8),2083-2104. |
| MLA | Su, Guoshao,et al."Spalling failure of deep hard rock caverns".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 15.8(2023):2083-2104. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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