中国矿山工程

The roof of 183_down 03 belt conveyor roadway is mudstone which can be easily broken under the influence of mining. In order to improve the strength of roadway support, the parameters of original bolt-mesh-cable support need to be optimized. Five support schemes are designed by using different anchor bolt density and anchor cable length. According to the stress and displacement changes of roadway wall rock in five support schemes simulated by FLAC^3D the results show that the roof deformation is smaller as the density of anchor bolt becomes higher and vice versa. The most reasonable parameters of bolt-mesh-cable support are determined in combination with economic benefits of mine. By monitoring roof deformation, it can be seen that the support strength is improved significantly after parameter optimization, and the roadway safety can be guaranteed under dynamic pressure.