Abstract: By using the finite difference software FLAC^3D, the pillar mining in the 16th coal seam of Zouwu Mine is simulated. Through monitoring the deformation of 17th coal seam roadway during mining, the feasibility of 16th coal seam pillar mining is evaluated. Simulation results show that the plastic zone area of 17th coal seam increases after pillar mining; pillar mining makes the deformation of 17th coal seam roadway increases 8%~16%, and the deformation of 2nd level main downhill in 17th coal seam is much more than the other roadways, and the deformation of 2nd level vice downhill in 17th coal seam is minimum. Pillar mining has little effect on the lower roadways. It shows that the pillar mining of 16th coal seam is feasible.