Deep Soft Rock Tunnel Support Technology and Simulation in Fanshan Phosphate Mine

The depth of the horizontal tunnel in Fanshan Phosphate Mine is over 350m, and the tunnel is disturbed by the stoping of working face, so it is difficult to support. Based on engineering geological survey and analysis we find the damage reason of tunnel, research the deformation mechanism and damage of deep tunnel with soft rock and confirm the compound deformation mechanism, in addition, combining the simulation results we put forward the anchor-mesh-cable support programs. The results show that the program can give full play to the coupling supporting of anchor-mesh-cable and control the deformation of tunnel effectively, therefore it creates a safe conditions for production.