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

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.