Abstract: In order to ensure safe and efficient mining,according to the mining technical conditions of the ore body and the physical and mechanical properties of the ore rock,the Flac3D software was used to carry out numerical simulation analysis on the different stope structure parameters of 4 mining plans.The results show that when mining ore bodies above the elevation of 1 235 m,the offect is the best with stope structure parameters as fallows:the length of the stope is 40 m,the continuous pillar of 2 m is left between ore rooms,and the top and bottom pillars are 2 m;when mining the ore body below the elevation of 1 235 m,the backfill mining method is the best;the mining concept of safe,efficient,low-cost,low-loss is met.The research achievement provides theoretical guidance for the safe production of the mine.