别斯库都克露天矿采-排复合边坡稳定性分析

Stability analysis of mining dumping composite slope in Biesikuduke Open-pit Mine

针对别斯库都克露天煤矿西外排土场与采场复合边坡的稳定性关系问题,在考虑西帮坡体内弱层赋存产状的基础上,运用刚体极限平衡法与数值模拟相结合的方法,分析了采排复合边坡的变形破坏机理,确定了西排土场距离采场的最小安全距离,优化调整排土场地表境界。结果表明:露天煤矿采排复合边坡的潜在滑坡模式为圆弧式后缘滑面的坐落滑移式破坏;当西外排土场与采场最小安全距离超出180 m时,西外排土场基本不会对采场边坡稳定性造成影响。

In response to the stability relationship between the west external dump and the composite slope of stope in Biesikuduke Open-pit Mine,on the basis of fully considering the occurrence of weak layers in the west slope,the article analyzes the deformation and failure mechanism of the mining and dumping composite slope using a combination of rigid body limit equilibrium method and numerical simulation.The article determines the minimum safe distance between the west dump and the mining site,and optimizes and adjusts the surface boundary of the dump.The results show that the potential landslide mode of the mining and dumping composite slope in Biesikuduke Open-pit Mine is the seated sliding failure of the circular arc trailing edge sliding surface.When the minimum safe distance between the west external dump and the mining site exceeds 180 m,the west external dump will not have a significant impact on the stability of the stope slope.