Abstract: The mine's orebody of western area of the Fanshan phosphate rock occurred under the confined aquifer.In order to protect the mining stopes from being submerged by the confined aquifer from the fractured zone generated while mining. So,the filling method of the point to level of hierarchy pillars is adopted to mining in this area. The roof deformation and stress distribution of the stope is numerical simulated by the FLAC3D software,so as to guarantee the security of the stope mining.

Key words: FLAC^3D software, Numerical simulation, Roof deformation, Distribution of stress