The 3102 fully mechanized caving face of Yong'an Coal Mine is a re-mining face. The top layer of this section belongs to the original mined-out area. When it was pushed down to 338m away from the belt, the roof fell in the middle of the on-site cut hole, which seriously affected the normal mining face. Promote and safe production.

　　

　　In order to ensure the safety of the 3102 fully mechanized caving face, Yong'an Coal Mine reported to the company in time. After on-site discussion and inspection, the company decided to adopt grouting reinforcement method to control the roof. In the face of new technologies and new processes, Yongan Coal Mine formulated detailed implementation plans and safety technical measures, and trained on-site operators. At the same time, it also adjusted the grouting materials and equipment for the coal wall in the severely falling area of the front roof of the face frame. Grouting and filling. During the period, the mine leaders insisted on following on-site and led all the staff of the fully mechanized mining team to work overtime to catch up with the construction period. After two consecutive days of fighting, the 3102 fully mechanized caving face passed the roof broken zone grouting reinforcement work on September 14 to effectively control the working face. The broken roof ensures normal production.