Abstract:In the process of seismic analysis of tailings dam, when dynamic finite element method is used for stability calculation of a dam slope, there is no evaluation standard and basis. By referring to the commonly used method for seismic stability analysis of earth-rock dam in hydraulic engineering, the judgment criteria is proposed for time history analysis of seismic stability of tailings dam, namely the cumulative time with safety factor below 1.0 is less than 2s. Through calculation and analysis of a centerline tailings dam, under the action of three seismic waves with horizontal and vertical ground motion taken into account at the same time, when the cumulative time of the dam slopes anti-sliding stability safety factor of less than 1.0 is respectively 0.64s, 0.52s and 0.22s, it can be determined that the tailings dam meets the requirement of seismic stability. The analysis method adopted can provide a certain reference for the seismic stability calculation of similar tailings dam projects.
