Shear-induced rockburst of double-tunnel rocks subjected to shear loading: A comparative analysis
文献类型：期刊论文
| 作者 | Xin, Jie2,3; Jiang, Quan2; Zhai, Di1; Feng, Guang-liang2; He, Ben-guo4; Li, Shao-jun2 |
| 刊名 | JOURNAL OF CENTRAL SOUTH UNIVERSITY
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| 出版日期 | 2023-12-01 |
| 卷号 | 30期号:12页码:4207-4229 |
| 关键词 | shear-induced rockburst physical model double-tunnel rocks discrete element method tunnel spacing stress field |
| ISSN号 | 2095-2899 |
| DOI | 10.1007/s11771-023-5496-0 |
| 英文摘要 | Understanding triggering mechanism of shear-induced rockburst is of great significance for design, construction and operation in underground engineering. To reveal triggering rockburst mechanism in double-tunnel rocks (DTR), double rectangular tunnel (DRT) and double circle tunnel (DCT) physical model shear tests are executed, combined with high-speed cameras and acoustic emission monitor. And five tunnel spacing numerical models are established to investigate the triggering rockburst meso-mechanism based on continuous-discontinuous shear process. In addition, a energy impact index (S) is presented to evaluate shear-induced rockburst proneness. The test results indicate that the shear characteristic, internal and external failure characteristics, and micro-crack number evolution characteristics of DTR can generally be divided into four unified typical stages. In terms of fracture evolution, the shear failure of DTR has experienced shear compression stage, elastic stage dominated by crack initiation, shear fracture stage dominated by crack propagation-coalescence and shear-induced rockburst, and shear friction stage. It is generalized into typical shear model, and it reveals that DTR exhibits a significant characteristic of symmetrical cat-ear shaped notch formed after the shear-induced rockburst. In the aspect of the evolution of micro-cracks, the specimen has crack quiet period, initial crack increase stage, rapid crack increase stage, and crack stability stage. In addition, when the tunnel spacing is greater than 2 times tunnel diameter, the stress concentration phenomenon is significantly optimized. More importantly, the essential triggering shear-induced rockburst mechanism difference between DRT and DCT is the structural effect caused by the section shape, i.e., the difference in stress field distribution between DRT and DCT leads to different rockburst behaviors. The research results are beneficial for deepening the understanding on mechanism of shear-induced rockburst. |
| 资助项目 | National Natural Science Foundation of China; Project[52325905] ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[Z020005] |
| WOS研究方向 | Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001156779800007 |
| 出版者 | JOURNAL OF CENTRAL SOUTH UNIV |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/40548]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Jiang, Quan |
| 作者单位 | 1.Xian Univ Sci & Technol, Energy Sch, Xian 710054, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Northeastern Univ, Key Lab, Minist Educ Safe Min Deep Met Mines, Shenyang 110819, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xin, Jie,Jiang, Quan,Zhai, Di,et al. Shear-induced rockburst of double-tunnel rocks subjected to shear loading: A comparative analysis[J]. JOURNAL OF CENTRAL SOUTH UNIVERSITY,2023,30(12):4207-4229. |
| APA | Xin, Jie,Jiang, Quan,Zhai, Di,Feng, Guang-liang,He, Ben-guo,&Li, Shao-jun.(2023).Shear-induced rockburst of double-tunnel rocks subjected to shear loading: A comparative analysis.JOURNAL OF CENTRAL SOUTH UNIVERSITY,30(12),4207-4229. |
| MLA | Xin, Jie,et al."Shear-induced rockburst of double-tunnel rocks subjected to shear loading: A comparative analysis".JOURNAL OF CENTRAL SOUTH UNIVERSITY 30.12(2023):4207-4229. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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