关键词: 尾矿坝, 渗流场, 稳定性, 数值分析

Abstract: Based on the introduction of the general process about the stability analysis of metal mine tailings dam, a gold mine tailings dam in Yangping Town, Linbao City is selected as an example. SEEP/W, the seepage analysis module of GEO-Studio, is applied to simulate the changing regularity of seepage field when the length of the dry beach is 30m, 50m or 100m respectively on the condition that the initial dam is impervious or pervious. Accordingly, SLOPE/W, the stability analysis module, is used to calculate the most dangerous sliding surface and stability factor in each condition. The results show that when the initial dam is impervious, the saturation line intersects tailings dam surface, and the groundwater will flow out from the dam surface; When the initial dam is pervious, the saturation line is lower than the initial dam and does not intersect the dam surface, in result, the groundwater will not flow out from the dam surface. In each condition, the stability coefficient is larger than the safety factor in the specification and when the initial dam is pervious the safety factor is larger than the factor when the initial dam is impervious. It also indicates that the tailings dam is stable, and it will be favorable for the stability of the tailings dam if the water permeability of initial dam is good.

Key words: Tailings dam, Seepage field, Stability, Numerical analysis