Abstract: In order to study the impact of the blasting vibration on the primary dam of the upstream tailing dam in Chengde，the finite element model was built taking the accumulative dam of a mining company as the sample.With the acceleration amplitude as the input load，ANSYS/LS-DYNA software was adopted to simulate the response of the primary dam of the upstream tailing dam to the stope blasting vibration under different input loads.The results showed that with the measured acceleration amplitude as the input loads，the horizontal displacement of all nodes on the slope moved towards the outer slope，while the vertical displacement moved downwards.Maximum horizontal and vertical displacements existed on the top of the primal tailing dam，and minimum displacement all near to the slope foot.All displacements increased with the increasing of height.When the amplified measured acceleration amplitude increasing to be a certain value，the horizontal displacement of each node near the slope were not uniform.The nodes at the slope foot moved towards external slope，and their maximum horizontal displacement increased with the increasing of acceleration amplitude，and decreased with the increasing of height.The other nodes moved towards internal slope，and the maximum horizontal displacement decreased with the increasing of acceleration amplitude，and increased with the increasing of height.The vertical displacement of nodes on the slope surface basically was not affected by the acceleration amplitude.

Key words: Blasting vibration, Upstream tailing dam, Numerical simulation