白音华一号露天煤矿北帮边坡塌落区治理研究

Study on treatment of collapse area of north slope in Baiyinhua No.1 Open-pit Coal Mine

为解决白音华一号露天煤矿北工作帮塌落区对安全生产所造成的影响,基于滑坡反分析方法来确定弱层物理力学参数,运用二维刚体极限平衡方法对白音华一号露天煤矿北工作帮塌落区进行边坡稳定性分析;提出了整体平盘扩展、逐水平平盘优化2种治理方案,优化了其边坡形态。结果表明:优化设计后的边坡稳定系数均可满足安全储备系数;白音华一号露天煤矿北工作帮塌落区采用整体平盘扩展剥离量为184.12 Mt,采用逐水平平盘优化设计剥离量为131.10 Mt;边坡治理措施为快速清理塌落区提供了技术支持,减少边坡塌落对露天矿生产的影响。

In order to solve the impact of the collapse area of the north working slope in Baiyinhua No.1 Open-pit Coal Mine on safety production,the article determines physical and mechanical parameters of the weak layer based on the landslide reverse analysis method,and analyzes the stability of the slope in the north working slope of Baiyinhua No.1 Open-pit Coal Mine by using the two-dimensional rigid body limit equilibrium method,presents two treatment plans,namely overall flat expansion and horizontal flat optimization,to optimize the slope shape.The results show that all the slope stability coefficients can satisfy the safety reserve coefficient after optimized design.In the collapse area of the north working slope of Baiyinhua No.1 Open-pit Coal Mine,the stripping amount is 184.12 Mt by using the overall flat expansion optimization design,and 131.10 Mt by using the horizontal flat expansion optimization design.The slope control measures provide technical support for quick clearing of collapse area and reduce the impact of slope collapse on open-pit production.