Supporting Technology of Roadway in Lower Seam of Short Distance Coal Seams

In order to solve the problem of surrounding rock maintenance in the mining roadway in the close seams, taking Ⅵ16-17-23140 working face of No.4 Coal Mine of Pingdingshan Coal Mine as the background, the surrounding rock control technology of the mining roadway in the lower coal seam of the short distance coal seams of Pingmei No.4 Coal Mine is studied by combining theoretical analysis, numerical simulation and engineering practice. The mechanical model of stress distribution is analyzed, and the distribution and transmission laws of mining stress are mastered. The combined support mode is proposed, which is mainly supported by bolt-mesh-cable support and supplemented by grouting-anchor-cable reinforcement support. The industrial test shows that the combined support method of mining roadway has good control effect on the surrounding rock of the mining roadway in the lower close seam, and the overall maintenance condition of the roadway is good.