Abstract: The Xiadian Gold Mine mainly mines thick and large ore bodies by pillarless sublevel caving method.As the mining depth increases,the ground pressure increases gradually,and the mineral properties are more susceptible to secondary stress field changes due to extraction perturbations,leading to ground pressure disasters.Based on Flac3D software to numerically model the activity of deep stope ground pressure,the law of stope ground pressure change is analyzed.Numerical simulation results showed that the horizontal stress of roof and floor was larger and the vertical stress of two sides was larger in the recovery access of pillarless sublevel caving method;horizontal stress appears concentrated in roof close to the extraction working surface;stress transfer in adjacent accesses occur.Horizontal stress monitoring of the roof of the stope is required during recovery process,and the stress should be monitored on the adjacent access when one access is recovered.