Stability Analysis of Jinchuan Hydropower Station Hydraulic Tunnels during Excavation and Unloading
As the hydropower development strategies of China continue to be implemented, a host of large hydropower projects have been completed or are being constructed in southwest China. During construction of the Jinchuan hydropower station, this study examined the stability of the surrounding rock during...
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MDPI AG
2022-11-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/22/11660 |
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| author | Yan Zhang Haoyu Mao Biao Li Yuepeng Sun |
| author_facet | Yan Zhang Haoyu Mao Biao Li Yuepeng Sun |
| author_sort | Yan Zhang |
| collection | DOAJ |
| description | As the hydropower development strategies of China continue to be implemented, a host of large hydropower projects have been completed or are being constructed in southwest China. During construction of the Jinchuan hydropower station, this study examined the stability of the surrounding rock during the excavation and unloading of hydraulic tunnels under demanding geological conditions. Microseismic (MS) monitoring technology was employed to monitor the deformation and failure of the surrounding rock online and in real time, based on engineering geological data and site surveys. To analyze the stability of the surrounding rock in the spillway tunnel and to study the temporal and spatial evolution characteristics of MS events, source parameter analysis and numerical modeling were performed. The 3D finite-difference numerical modeling software FLAC3D was used to simulate the mechanical response of the surrounding rock during the excavation and unloading of the spillway tunnel and the diversion tunnel. The numerical modeling results were compared with the monitoring results and site surveys to determine the failure mechanisms of the surrounding rock during the construction and unloading of the hydraulic tunnels. The research results can serve as a guide for studying the stability of the surrounding rock in similar hydraulic tunnels. |
| first_indexed | 2024-03-09T18:29:39Z |
| format | Article |
| id | doaj.art-bb6bb8e823cd4997a9863aaa6830fc79 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T18:29:39Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
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| spelling | doaj.art-bb6bb8e823cd4997a9863aaa6830fc792023-11-24T07:38:52ZengMDPI AGApplied Sciences2076-34172022-11-0112221166010.3390/app122211660Stability Analysis of Jinchuan Hydropower Station Hydraulic Tunnels during Excavation and UnloadingYan Zhang0Haoyu Mao1Biao Li2Yuepeng Sun3Chn Energy Dadu River Hydropower Development Co., Ltd., Chengdu 610041, 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, ChinaAs the hydropower development strategies of China continue to be implemented, a host of large hydropower projects have been completed or are being constructed in southwest China. During construction of the Jinchuan hydropower station, this study examined the stability of the surrounding rock during the excavation and unloading of hydraulic tunnels under demanding geological conditions. Microseismic (MS) monitoring technology was employed to monitor the deformation and failure of the surrounding rock online and in real time, based on engineering geological data and site surveys. To analyze the stability of the surrounding rock in the spillway tunnel and to study the temporal and spatial evolution characteristics of MS events, source parameter analysis and numerical modeling were performed. The 3D finite-difference numerical modeling software FLAC3D was used to simulate the mechanical response of the surrounding rock during the excavation and unloading of the spillway tunnel and the diversion tunnel. The numerical modeling results were compared with the monitoring results and site surveys to determine the failure mechanisms of the surrounding rock during the construction and unloading of the hydraulic tunnels. The research results can serve as a guide for studying the stability of the surrounding rock in similar hydraulic tunnels.https://www.mdpi.com/2076-3417/12/22/11660Jinchuan hydropower stationMS monitoringsurrounding rock stabilitynumerical modeling |
| spellingShingle | Yan Zhang Haoyu Mao Biao Li Yuepeng Sun Stability Analysis of Jinchuan Hydropower Station Hydraulic Tunnels during Excavation and Unloading Applied Sciences Jinchuan hydropower station MS monitoring surrounding rock stability numerical modeling |
| title | Stability Analysis of Jinchuan Hydropower Station Hydraulic Tunnels during Excavation and Unloading |
| title_full | Stability Analysis of Jinchuan Hydropower Station Hydraulic Tunnels during Excavation and Unloading |
| title_fullStr | Stability Analysis of Jinchuan Hydropower Station Hydraulic Tunnels during Excavation and Unloading |
| title_full_unstemmed | Stability Analysis of Jinchuan Hydropower Station Hydraulic Tunnels during Excavation and Unloading |
| title_short | Stability Analysis of Jinchuan Hydropower Station Hydraulic Tunnels during Excavation and Unloading |
| title_sort | stability analysis of jinchuan hydropower station hydraulic tunnels during excavation and unloading |
| topic | Jinchuan hydropower station MS monitoring surrounding rock stability numerical modeling |
| url | https://www.mdpi.com/2076-3417/12/22/11660 |
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