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Semi diagenetic rocks refer to special rocks that have not been completely deposited and metamorphosed in the Neogene Period. They have both the characteristics of soil and rock in composition, structure, and construction. Semi diagenetic rock has weak cementation, low strength, and poor resistance to water. Serious water and mud inrushs occurred in semi diagenetic surrounding rock in Wangjiazhai Tunnel of Lincang-Qingshuihe Expressway, Yunnan Province, China during excavation which brought great difficulties to the project. A systematic case study on the water and mud inrush disaster was performed with Wangjiazhai Tunnel as an example. The basic laws of water and mud inrush were summarized based on observation and engineering geological analysis. Water and mud inrush mechanisms were revealed according to inrush phenomena. Comprehensive disposal methods were suggested to prevent and control the inrush disasters. The research results can provide reference basis for similar engineering construction and disaster control.

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Water and Mud Inrush in a Semi-diagenesis Tunnel: Evolution Law, Mechanism Analysis and Prevention Method

  • 会议论文

  • 发表日期：

    2025年

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  • Qiuyi Wang,
  • Jinsong Xu,
  • Jianxiu Wang,
  • Qianyuan Zhang,
  • Wenqi Ding,
  • Qingzhao Zhang,
  • Minglin Lei,
  • Huboqiang Li,
  • Weidong Zhao,
  • Hua Lei,
  • Shixiang Li

摘要

Semi diagenetic rocks refer to special rocks that have not been completely deposited and metamorphosed in the Neogene Period. They have both the characteristics of soil and rock in composition, structure, and construction. Semi diagenetic rock has weak cementation, low strength, and poor resistance to water. Serious water and mud inrushs occurred in semi diagenetic surrounding rock in Wangjiazhai Tunnel of Lincang-Qingshuihe Expressway, Yunnan Province, China during excavation which brought great difficulties to the project. A systematic case study on the water and mud inrush disaster was performed with Wangjiazhai Tunnel as an example. The basic laws of water and mud inrush were summarized based on observation and engineering geological analysis. Water and mud inrush mechanisms were revealed according to inrush phenomena. Comprehensive disposal methods were suggested to prevent and control the inrush disasters. The research results can provide reference basis for similar engineering construction and disaster control.