关键词: 浅埋煤层, 回撤通道, 顶板支护, 围岩控制

Abstract: In view of the problem that the retracement channel is affected by mining and the stability of the roof of the roadway is poor and the deformation is large, the 20117 retracement channel of Gaojialiang Coal Mine in Inner Mongolia is taken as the engineering background, and the reinforcement plan of the retracement channel roof is proposed, and the anchor beam structure of the retracement channel is established. The mechanical model analyzes the stability of the anchor beam structure theoretically and conducts field practice in the 20117 retracement channel. The results show that the displacement of the top and bottom plates of the 20117 retracement roadway is small, and the roadway is relatively stable. The optimized anchor (net) cable and truss type support method can strengthen and strengthen the surrounding rock and control it well. The deformation of the surrounding rock ensures the safety of the working face.