In-situ observations of damage-fracture evolution in surrounding rock upon unloading in 2400-m-deep tunnels
文献类型：期刊论文
| 作者 | Guo, Haosen2,4; Sun, Qiancheng2,3; Feng, Guangliang1; Li, Shaojun1; Xiao, Yaxun1 |
| 刊名 | INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
 |
| 出版日期 | 2023-04-01 |
| 卷号 | 33期号:4页码:437-446 |
| 关键词 | Deep tunnel Fractured zone Damaged zone In -situ observation Unloading of rock mass |
| ISSN号 | 2095-2686 |
| DOI | 10.1016/j.ijmst.2022.11.008 |
| 英文摘要 | The damage-fracture evolution of deep rock mass has obvious particularity, which is revealed in 2400-m -deep tunnels by field tests. The evolution of the excavation damaged zone depth is consistent with that of the fractured zone depth. The ratio of the excavation damaged zone depth to the excavation fractured zone depth is greater than 2.0 in a rock mass with both high strength and good integrity, but less than 1.5 in a rock mass with lower strength or poor integrity. Zonal disintegration in a rock mass with high strength and fair integrity is more likely to occur when it contains more than two groups of primary fractures in damaged zones. Fractures develop outward in zonal disintegration but are totally different from the single-zone fracture, in which the fractures develop inward, and it is the starting position of the fractured zone when the excavation surface of the middle pilot is 7-9 m close to the pre-set borehole and it stops after the excavation surface of the baseplate is 11-14 m away. The most intense evolution occurs around 2-4 m from the pre-set borehole in the sidewall expansion stage. The research results provide a reference for the monitoring scheme and support design of CJPL-III in its future construction.(c) 2023 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[51909136] ; National Natural Science Foundation of China[42177168] ; Project of Youth Innovation Promotion Association of Chinese Academy of Sciences[2021326] ; Open Research Fund of Key Laboratory of Geological Hazards on Three Gorges Reservoir Area (China Three Gorges University) , Ministry of Education[2020KDZ03] |
| WOS研究方向 | Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:001090459400001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/39705]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Sun, Qiancheng; Feng, Guangliang |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Minist Educ, Key Lab Geol Hazards Three Gorges Reservoir Area, Yichang 443002, Peoples R China 3.China Three Gorges Univ, Coll Civil Engn & Architecture, Yichang 443002, Peoples R China 4.Jiangxi Key Lab Disaster Prevent mitigat & Emergen, Nanchang 330013, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Haosen,Sun, Qiancheng,Feng, Guangliang,et al. In-situ observations of damage-fracture evolution in surrounding rock upon unloading in 2400-m-deep tunnels[J]. INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY,2023,33(4):437-446. |
| APA | Guo, Haosen,Sun, Qiancheng,Feng, Guangliang,Li, Shaojun,&Xiao, Yaxun.(2023).In-situ observations of damage-fracture evolution in surrounding rock upon unloading in 2400-m-deep tunnels.INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY,33(4),437-446. |
| MLA | Guo, Haosen,et al."In-situ observations of damage-fracture evolution in surrounding rock upon unloading in 2400-m-deep tunnels".INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY 33.4(2023):437-446. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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