某露天镁矿排土场增高扩容及边坡稳定性研究

Study on Capacity Expansion and Slope Stability of WasteDump of a Open Pit Magnesium Mine

介绍了某露天镁矿南排土场现状,计算了南排土场极限堆置高度。以极限堆置高度为前提,通过理论计算南排土场在不同优化参数条件下的边坡稳定性系数,确定了该排土场的最优参数为帮坡角β=24°、排弃高度H=120 m,并通过FLAC^(3D)数值模拟软件验证了结果的准确性,最终边坡安全系数为1.223,排土场扩容量180.64万m^(3),有效地解决了该矿山排土空间不足的问题。

The current situation of the south waste dump of an open pit magnesium mine is briefly introduced,and the maximum stacking height of the south waste dump is calculated.With the maximum stacking height as the premise,the slope stability coefficients of the south waste dump under the condition of different optimized parameters are calculated theoretically,and the optimal parameters of the waste dump is determined as the slope angleβof 24°and the discarding height H of 120m.The accuracy of the results is verified with FLAC^(3D)numerical simulation software,the slope safety coefficient is finalized to be 1.223,and the expansion capacity of the waste dump 1.864 million m^(3).It effectively solves the problem of insufficient waste dumping space in the mine.