Dashe Mine of Fengfeng Group is a complex hydrogeological mine, the west wing panel of mine drainage system was completed and put into use in 2007. West wing disc pump room located in the west wing rail roadway at the bottom of the slope, the main drainage pipeline laying in the west wing of return air roadway, return air roadway pipeline and pumping station pipeline through the shaft and 100 m slope roadway connection. Due to the use of a slope for nearly 10 years, the roadway deformation is serious, and the repair is difficult, extrusion drainage pipeline, caused by repeatedly running water, leading to the west wing panel to drainage, a serious threat to safety panel. The construction method of drainage holes took the place of mine slope roadway drainage pipeline construction, drainage hole took anti well drilling, and the pipe in pipe technology was applied, finally this technology successfully solved the problem of the west wing disc area drainage.