The Support Technique for Deep Weak and Soft Broken Rock Chamber in Guqiao Coal Mine

Combined with the actual situation of the central mine substation chamber deformation and failure in Guqiao Mine, the main reason of the deformation and failure of chamber is analyzed, the repair program with whole section grouting reinforcement of chamber and deep cable grouting on the bottom is put forward. After nearly two month of field observations, the governance measures can effectively reinforce the weak broken chamber and pass through the fault roadway.