Stability Analysis and Fracture Mechanism of Surrounding Rock in a Hydraulic Tunnel Based on Microseismic Monitoring
Numerous large hydropower projects have been built, are being built, or are planned to be developed in southwest China as a result of the increasing demand for clean energy in China’s social and economic development. Based on engineering geological data, site surveys, and the temporal and spatial di...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-09-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/18/9362 |
| _version_ | 1797491385108004864 |
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| author | Zhi Li Haoyu Mao Biao Li Xiang Zhou Guo Liao Jianjun Chen |
| author_facet | Zhi Li Haoyu Mao Biao Li Xiang Zhou Guo Liao Jianjun Chen |
| author_sort | Zhi Li |
| collection | DOAJ |
| description | Numerous large hydropower projects have been built, are being built, or are planned to be developed in southwest China as a result of the increasing demand for clean energy in China’s social and economic development. Based on engineering geological data, site surveys, and the temporal and spatial distribution characteristics of microseismic (MS) events, an MS monitoring system was developed in this study to analyze the stability of the surrounding rock of the spillway tunnel of the Jinchuan hydropower station as well as the fracture and damage mechanism in the concentration zone. The results of the study indicated that the distribution of MS events was correlated with the construction process and geological conditions, that the concentration of MS events and their great moment magnitude could be regarded as signs of future damage to the surrounding rock, and that the surrounding rock of the spillway tunnel primarily exhibited non-shear failure, such as tensile failure, with only a small area exhibiting shear failure. The results can be used as a construction reference and as a forewarning of surrounding rock deformation. |
| first_indexed | 2024-03-10T00:46:44Z |
| format | Article |
| id | doaj.art-10727b6888914e63ad375b5c8a700427 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T00:46:44Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-10727b6888914e63ad375b5c8a7004272023-11-23T14:57:23ZengMDPI AGApplied Sciences2076-34172022-09-011218936210.3390/app12189362Stability Analysis and Fracture Mechanism of Surrounding Rock in a Hydraulic Tunnel Based on Microseismic MonitoringZhi Li0Haoyu Mao1Biao Li2Xiang Zhou3Guo Liao4Jianjun Chen5Sinohydro Bureau 7 Co., Ltd. of PowerChina, Chengdu 617730, ChinaState Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower, Sichuan University, Chengdu 610065, ChinaSchool of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, ChinaState Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower, Sichuan University, Chengdu 610065, ChinaSinohydro Bureau 7 Co., Ltd. of PowerChina, Chengdu 617730, ChinaSinohydro Bureau 7 Co., Ltd. of PowerChina, Chengdu 617730, ChinaNumerous large hydropower projects have been built, are being built, or are planned to be developed in southwest China as a result of the increasing demand for clean energy in China’s social and economic development. Based on engineering geological data, site surveys, and the temporal and spatial distribution characteristics of microseismic (MS) events, an MS monitoring system was developed in this study to analyze the stability of the surrounding rock of the spillway tunnel of the Jinchuan hydropower station as well as the fracture and damage mechanism in the concentration zone. The results of the study indicated that the distribution of MS events was correlated with the construction process and geological conditions, that the concentration of MS events and their great moment magnitude could be regarded as signs of future damage to the surrounding rock, and that the surrounding rock of the spillway tunnel primarily exhibited non-shear failure, such as tensile failure, with only a small area exhibiting shear failure. The results can be used as a construction reference and as a forewarning of surrounding rock deformation.https://www.mdpi.com/2076-3417/12/18/9362Jinchuan hydropower stationMS monitoringstability of surrounding rockfracture and damage mechanism |
| spellingShingle | Zhi Li Haoyu Mao Biao Li Xiang Zhou Guo Liao Jianjun Chen Stability Analysis and Fracture Mechanism of Surrounding Rock in a Hydraulic Tunnel Based on Microseismic Monitoring Applied Sciences Jinchuan hydropower station MS monitoring stability of surrounding rock fracture and damage mechanism |
| title | Stability Analysis and Fracture Mechanism of Surrounding Rock in a Hydraulic Tunnel Based on Microseismic Monitoring |
| title_full | Stability Analysis and Fracture Mechanism of Surrounding Rock in a Hydraulic Tunnel Based on Microseismic Monitoring |
| title_fullStr | Stability Analysis and Fracture Mechanism of Surrounding Rock in a Hydraulic Tunnel Based on Microseismic Monitoring |
| title_full_unstemmed | Stability Analysis and Fracture Mechanism of Surrounding Rock in a Hydraulic Tunnel Based on Microseismic Monitoring |
| title_short | Stability Analysis and Fracture Mechanism of Surrounding Rock in a Hydraulic Tunnel Based on Microseismic Monitoring |
| title_sort | stability analysis and fracture mechanism of surrounding rock in a hydraulic tunnel based on microseismic monitoring |
| topic | Jinchuan hydropower station MS monitoring stability of surrounding rock fracture and damage mechanism |
| url | https://www.mdpi.com/2076-3417/12/18/9362 |
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