宝日希勒露天煤矿单台阶安全距离确定方法

A method for determining safe distance of single step in Baorixile Open-pit Coal Mine

针对露天煤矿重型设备至台阶坡顶线的安全距离问题,以设计台阶坡面角为出发点,考虑垂直拉裂缝,采用极限平衡理论对不同岩性的台阶坡面进行稳定性分析,在确定潜在滑面形态的基础上,提出了露天煤矿单台阶安全距离确定方法;以宝日希勒露天煤矿为工程背景,基于Morgenstern-Price法与数值模拟相结合的方法,确定了设备至台阶坡顶线的安全距离,并分析了不同岩性单台阶的失稳机理。

Aiming at the safe distance from heavy equipment to the top line of bench slope in open-pit coal mine,taking the design of step slope angle as the starting point and considering vertical tensile cracks,the limit equilibrium theory is used to analyze the stability of step slope with different lithology,on the basis of determining the shape of potential sliding surface,the article puts forward a method for determining the safety distance of single step in open-pit coal mine.Taking Baorixile Open-pit Coal Mine as the engineering background,based on the combination of Morgenstern-Price method and numerical simulation method,the article determines safe distance between the equipment and the top line of the step slope,and analyzes the instability mechanism of single step with different lithology.