Abstract
Based on the theory of low permeability and permeability of coal seam in Huainan mining area, a variety of measures are analyzed based on the theory of low permeability and low permeability of coal seam in Huainan mining area. Through the application in floor roadway of No.2 level and No.1 mining area in one Huainan coal mine, the results show that the hydraulic permeability enhancement technology can significantly improve the coal seam permeability. After 30 days of gas drainage, the average gas drainage pure amount of the collaborative hydraulic permeability increasing drilling hole is 9.5 times of that of the ordinary drilling hole, and can continuously ensure the gas drainage efficiency of high flow and concentration Fruit.
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