露天矿外排土场增高扩容稳定性研究

摘要

通过黄土基底排土场增高存在的问题及其可能出现的破坏模式的分析.计算了排土场增高对基底黄土产生的附加应力,这种力将改变黄土结构,其将促使第四系棕红黏土转变为隔水层,将降低土体的抗剪强度.通过对外排土增高扩容2种设计方案稳定性验算,对其变形破坏模式、影响范围及稳定性对比,确定最终采矿方案.%Through analyzing the existing problems of loess basement dump heighten and the possible failure mode, the article calculates the additional stress of the increased heighten on loess basement, which can change the loess structure, lead to quaternary palm red clay into water-resisting layer and reduce the shear strength of soil mass. By checking two kinds of design scheme stability of increased capacity, the article compares the deformation failure mode, scope and stability, determines the final mining plan.