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The high roof gas pumping Lane is special tunnel's roof, has been widely used in Yangquan Mining Area in China, it is an effective way to solve the fully mechanized caving face under the conditions of high gas seam group adjacent layer of pressure relief gas drainage. Yangquan Mining District surface main mining No. 15 coal seam adjacent layer of gas emission by more than 90% accounted for fully mechanized caving face gas emission, gas emission in adjacent layers gas main, the mining layer of gas emission share smaller proportion. Therefore, high Roof Gas Drainage Roadway drainage situation is directly related to the safety of the mine efficient production. High Roof Gas Drainage Roadway design and support mainly rely on field experience, the staff will not be able to enter once put into use. Are bound to the bottom face of the mining influence, is mined crack band high pumping Lane deformation and failure, the high pumping Lane deformation and failure of a direct impact to the adjacent layer of gas drainage restricted the safe and efficient production of high gas mine . Domestic scholars lack of a systematic study of the deformation process of mining of high pumping Lane, the lack of in-depth research on the the high pumping Lane best laid position, which restricts the use of the effect of high pumping Lane. In this paper, the numerical simulation and theoretical analysis, the following conclusions: 1) the end of the drum is a The Roof Gas Lane pumping typical high destruction characteristics. Located in the mined-out area behind the 80m high pumping Lane, reduction of severe contraction, high pumping Lane is located in the rear of the goaf 140m, the cross section is substantially closed. 2) high pumping Lane kick drum process is divided into three phases: (a) slow kick drum stage. Lane is located in the goaf 40m before high pumping small amount of kick drum; (b) violent kick drum stage. Lane end of high pumping Lane is located in the mined-out area 40 ~ 80m, high pumping drum increased significantly; (c) the end of the drum closure stage. The high pumping Lane located goaf 80m kick drum slowly increased until the roadway basic closed. 3) in the mining process, high pumping Lane two sides and the bottom plate horizontal stress increased significantly, while the roof level of stress significantly reduced. The high pumping Lane mechanical deformation and failure analysis showed that the high horizontal stress continues to increase pumping two sides and the bottom plate Lane mining process, leading to high pumping Drift Bottom abscission layer, lower intensity, which occurred in the kick drum damage. 4) from the coal seams 60m, 70m, 85m horizon, high pumping Lane best laid position, respectively, from the back to the wind, Lane 40 to 60m, 40 ~~ 70m, 60 ~~ 90m. This research will have high gas mine roof pumping Lane reasonable arrangement to provide a scientific basis, to mine coal and gas safety and efficient extraction.
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