Floor failure and roadway deformation induced by contiguous coal seams mining at Huopu Mine

Mining-induced floor failure of contiguous coal seams, numbered 1#, 3#, 5#, 7#, and 12#, is studied by theoretical calculation and numerical simulation based on the geological conditions at Huopu Mine. The results indicate that pressure relief failure of the floor in the mining of contiguous coal seams is notably different from that in the mining of a single coal seam. During the mining of the current panel, a large range of surrounding rocks...