关键词: 井壁破坏, 立井修复, 井圈加固, 注浆, 卸压槽

Abstract: With the gradual increase of coal mining depth, more and more coal mines adopt vertical shaft development mode. The phenomenon of shaft wall destruction occurs from time to time due to a variety of reasons. In this paper, the pulverized and broken condition of main shaft wall in Liuyuanzi Coal Mine in Gansu Province is taken as the engineering background, and the reasons of shaft wall destruction are deeply analyzed by using wall peeping technology, measuring the strength of shaft wall samples and analyzing the water quality behind the shaft wall. In view of the failure characteristics, the comprehensive repair and treatment scheme of " strengthening, inject and release" was put forward. Through on-site verification and later monitoring, the operation of the repaired shaft was in good condition, and no shaft wall damage occurred, which provided a strong guarantee for the normal and safe production of the mine.