Abstract: Based on the slope seismic stability analysis method proposed by Wantanabe and with the real case of an tailing dam, the effect of different accelearation peak values on the horizontal equivalent acceleation time course, safty factor time course and potential sliding block slippage developement process on the dam body and the dam reinforcement effect are studied.The results show that the reinforcement of tailing dambody can well control the seismic slippage and improve the integral anti-seismic capability.The inrease in the reinforcing material space and the decrease of design strength will both reduce the seismic safety coefficient of dam body.It is suggested tha proper reinforcement material space and type should be selected according to specific conditions.

Key words: Tailing dam, Stability analysis, Reinforcemnt, Permanent deformation, Seism