Abstract: The stability of tunnels is the guarantee for safe and efficient mining production,and predicting the stability of reserved tunnels inside fill bodies under dynamic forces is the key to guiding practical engineering.To study the dynamic response laws of reserved tunnels inside fill bodies under different disturbances,a certain mining engineering was taken as the research object,and a three-dimensional numerical model of tunnel dynamic stability analysis was established and numerically simulated using 3DEC numerical simulation technology.The research results show that for horseshoe-shaped tunnels,the impact of dynamic disturbances at the same level has a greater influence on the sidewall.As the distance of dynamic disturbances increases,the difference in particle vibration around the tunnel becomes smaller.The reserved tunnel mining method using  steel wire rope and steel mesh can effectively and reasonably weaken the dynamic disturbance from outside blasting to a great extent,which is very favorable for maintaining tunnel stability.