Tailings pond is an important facility of mining and its safety affects the safety of people and property.Arrangement of sub-dams is one factor of influence on stability of tailings dam.The theory of strength reduction method of setting-up such kind of dam is introduced in the paper,and the influence of height and slope ratio of sub-dams on safety factor of tailings dam are analyzed by using strength reduction of FLAC.The results show that safety factor of tailings dam becomes lower when height of sub-dams rises in the condition of invariant slope ratio of sub-dams;safety factor of tailings dam magnifies when its slope ratio increases in the condition of invariant height of sub-dams.Analysis results have a certain application value on design of tailings dam and field management.%尾矿库是矿山重要设施,其安全影响周围人员和财产安全.堆积坝子坝布置是影响尾矿坝稳定性的因素之一.利用FLAC软件采用强度折减法分析了子坝高度和子坝坡比对尾矿坝安全系数影响.结果表明,子坝坡比不变条件下,尾矿坝安全系数随堆积坝子坝高度升高而降低.在子坝高度不变条件下,尾矿坝安全系数随子坝坡比增加而增大.分析成果对尾矿坝设计及现场管理具有一定的应用价值.
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