多弱层顺倾软岩边坡控制开采技术

    Controlled mining technology of multi-weak bedding down-dipping soft rock slope

    • 摘要: 针对多弱层顺倾软岩边坡下部压煤问题,从边坡变形风险可控以及资源回收最大化角度出发,在分析地质资料和弱层层位的基础上,结合单一弱层的控制开采技术,提出了多弱层顺倾软岩边坡控制开采技术;以扎尼河露天矿北端帮边坡为工程背景,基于极限平衡理论,分析了北端帮边坡的稳定性,对多弱层控制的顺倾软岩边坡控制开采方案进行了研究。研究表明:通过多弱层顺倾软岩边坡控制开采技术的实施,可在采场深部增加内排物料形成“中间桥”工艺,对深部弱层形成“压覆”,对整体边坡形成“支撑”,保证边坡沿各弱层滑动均得以控制,实现多弱层顺倾软岩边坡煤炭高效回收以及蠕动形变的稳定性控制。

       

      Abstract: Aiming at the problem of coal at the lower part of multi-weak bedding down-dipping soft rock slope, from the perspective of controllable slope deformation risk and the maximization of resource recovery, based on the analysis of geological data and weak layer layers, combined with the controlled mining of a single weak layer technology, a technology for controlled mining of multi-weak bedding down-dipping soft rock slope was proposed; taking the northern slope of Zhanihe Open-pit Mine as the engineering background, and based on the limit equilibrium theory, the stability of the northern slope was analyzed, and the controlled mining scheme for multi-weak strata controlled down-dipping soft rock slope is studied. Research shows that through the implementation of multi-weak layer down-dipping soft rock slope control mining technology, internal discharge of materials can be increased in the deep part of the stope to form an “intermediate bridge” process, the deep weak layer can form a “overburden”, and the whole slope can form a “support”, so as to ensure that the slope sliding along each weak layer can be controlled, and the multi-weak layer down-dipping soft rock slope can achieve efficient coal recovery and the stability control of creep deformation.

       

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