中国矿山工程

After the mining of the 53-01 working face, it is easy to form a large area of suspended roof. When the suspended roof bends, suddenly fractures, and collapses, it can cause impact disasters. By establishing a mechanical model of the cantilever structure of the top plate, the main factors affecting the impact of ground pressure on the span l of the cantilever structure are obtained. Propose to reduce the risk of impact in the working face by combining the weakening of the suspended roof structure, the restoration of the tunnel section, and the anti impact of the composite weak structure. After pressure relief, the average amount of drilling cuttings is 2.86kg/m, which is stable at around 2.9kg/m and within a safe range, achieving good results in anti erosion.