Abstract: According to the laws of overlying strata movement above gob and gas migration, combined the scene of Lu'an Group Wuyang Mine 7801 fully mechanized caving face, by using FLAC^3D to analyze the relative displacement between the roof and floor, the relative displacement between the left side and right side, the maximum stress, the laws of deformation and failure of high-level drainage roadway was determined under the mining influence, then the position of high-level drainage roadway was optimized.