Abstract: In order to solve the problem of super high saturation line of the dam body obtained from the investigation of potential safety hazards of Yinshan mining tailings pond of Jiangxi Copper Group,and to ensure the stability of the dam body,combined with the actual situation of the tailings pond site,on the basis of fully analyzing the characteristics of different drainage methods,the vertical horizontal combined self flow drainage method is proposed,and an economic,reasonable and feasible technical scheme is formulated.Through the observation data table of saturation line It is clear that after the implementation of the drainage scheme,the saturation line of the dam body has obviously decreased,and the local seepage and swamping of the dam body have significantly improved,effectively ensuring the stability of the dam body.

Key words: Phreatic line superelevation, Dam stability, Tailings pond, Vertical horizontal combined gravity drainage