安太堡露天矿内排土场扩容边坡稳定性分析

Stability analysis of expanding slope in internal dump of Antaibao Open-pit Mine

为了降低安太堡露天矿外排土场的用地面积,研究了在背斜构造条件下,内排土场扩容的可行性;根据对排土现状的分析,提出了2套内排排土扩容方案;基于最新修正的安太堡露天矿三维地质模型、地表现状航测成果和排土方案设计,构建了边坡工程地质模型;采用极限平衡法中Spencer和M-P法对两套方案的内排土场扩容后的边坡稳定性进行了安全评价分析。结果表明:内排土场扩容方案1更有利于安太堡露天矿安全生产建设。

To reduce the land area occupied by the external dump of Antaibao Open-pit Mine,the article studies the feasibility of expanding the internal dump under the conditions of anticline structures,proposes two sets of expansion plans for internal dumping based on the analysis of the current inner dumping situation.We construct a geological model of slope engineering based on the latest revised three-dimensional geological model of Antaibao Open-pit Mine,surface condition aerial survey results,and dumping plan design,evaluates the stability of the slopes after the expansion of the internal dump under the two plans for safety using the Spencer and M-P methods of limit equilibrium analysis.The results indicate that expansion plan 1 for the internal dump is more conducive to the safe production and construction of Antaibao Open-pit Mine.