Volume 41 Issue 1
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Zeng Bin, Chen Zhihua, Shao Changjie, Peng Dingmao. Analysis of source and path of water inrush in karst tunnel based on the theory of groundwater flow system[J]. Bulletin of Geological Science and Technology, 2022, 41(1): 99-108. doi: 10.19509/j.cnki.dzkq.2022.0006
Citation: Zeng Bin, Chen Zhihua, Shao Changjie, Peng Dingmao. Analysis of source and path of water inrush in karst tunnel based on the theory of groundwater flow system[J]. Bulletin of Geological Science and Technology, 2022, 41(1): 99-108. doi: 10.19509/j.cnki.dzkq.2022.0006

Analysis of source and path of water inrush in karst tunnel based on the theory of groundwater flow system

doi: 10.19509/j.cnki.dzkq.2022.0006
  • Received Date: 02 Nov 2021
    Available Online: 02 Mar 2022
  • Shuanglong Cave is a famous national scenic spot.The proposed Jinhua Mountain Tunnel is located about 12 km northeast of the Shuanglong Cave Scenic Area in Jinhua City, Zhejiang Province.The excavation of the Jinhua Mountain Tunnel may cause the karst water in Shuanglong Cave Scenic Area to be drained.At the same time, the tunnel may also be possiblely suffer the danger of karst water inrush.Based on the theory of groundwater flow system, combined with the survey results of hydrogeological conditions in the study area, the division of karst groundwater flow systems, the analysis of the geological structure of the key karst distribution areas at the exit of the tunnel, and the results of hydrogeochemical tests, the hydraulic connection between the two karst groundwater flow systems where the Shuanglong Cave and the tunnel site are located and the possibility of water inrush were analyzed.The results show that: if the tunnel exit section is exposed to the karst aquifer and drained, it will only affect the limited karst groundwater and fissure water around it, and will not directly connect to the large-scale karst groundwater flow system on the west side of the study area; during the tunnel construction and operation period, the karst groundwater in the Shuanglong Cave Scenic Area will basically not be affected, and the karst groundwater in the Shuanglong Cave will not pose a direct threat of water inrush at the exit section of the tunnel.In the study of water inrush source in karst areas, the rational division of karst groundwater flow systems based on the theory of groundwater flow system and analysis of the hydraulic connections between the systems are necessary prerequisites for analyzing the source of water inrush and preventing water inrush disasters.

     

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