Layout and Support Design of Double Roadway in Shangshe Coal Mine
Using UDEC numerical model,the fracture propagation evolution and surrounding rock deformation characteristics of 9217 double-roadway driving face in the double-lane driving stage and the mining process of the head working face under different coal pillar sizes were analyzed.The most reasonable width of coal pillar was determined to be 12 m,and the anchor cable support parameters of 9217 return air channel were designed.The scheme was successfully applied to the engineering practice of Shangshe Coal Mine,and the ideal surrounding rock control effect was obtained,the mining efficiency was significantly improved,and the problem of mining replacement was alleviated.
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