Bellows-liquid coupling equations were established according to the problem of tailings dam stability by flood level rising.FLAC3D was used to carry out the numerical analysis for seepage stability of tailings dam under floods infiltration.The change rules of flood saturation,pore water pressure,slope stress and displacement were researched.The influence of flood level rising on seepage stability of tailings dam was obtained.By the analysis of the dam safety index,the dam slope safety coefficient is 1.66,po...