富水含水层下掘进巷道防治水技术研究

Research on Water Prevention and Control Technology for Excavated Tunnels under Rich Water Aquifer

针对61206运输巷在富水含水层下掘进面临的防治水压力大、围岩控制难度高等问题,结合现场条件综合采用超前定向长钻孔+短钻孔方式进行疏排,后通过深孔注浆+锚网索喷浆方式封堵导水裂隙、控制围岩变形,现场应用取得较好成果。

In response to the problems of high water pressure and difficulty in controlling surrounding rock in the excavation of 61206 transport roadway under rich water aquifers,advanced directional long drilling and short drilling methods were comprehensively adopted for drainage based on site conditions.Then,deep hole grouting and anchor net spraying were used to seal the water conducting cracks and control the deformation of surrounding rock.Good results were achieved in field application.