关键词: 极近距离煤层, 采空区, 巷道位置, 围岩控制, 支护技术

Abstract: Abstact: In order to solve the safe mining problem of 1501 working face under the goaf of extremely close coal seam in Zhunnan Coal Mine, the roadway position and support mode of 1501 working face were studied by means of theoretical calculation, numerical simulation and field measurement.The results show that in order to effectively avoid the influence of residual pillars in the upper goaf, the reasonable horizontal staggered distance between the 1501 mining roadway and the upper residual pillars is 9 m; and aiming at the stress distribution law, rock thickness and mechanical properties of the floor of the goaf in the very close coal seam, the roadway supporting countermeasures and supporting schemes are put forward; during the mining process of 1501 working face, the maximum relative displacement of the roof and floor of the roadway is 222.5 mm.,and the maximum relative displacement of the two sides is 151 mm, and there is no collapse of shed legs, roof fall and side slice in the roadway. The safe mining is realized in the working face.