本文通过抽放解放层采空区瓦斯的试验说明:此方法可解决解放层工作面瓦斯超限问题,使工作面回风流瓦斯浓度降低10.8～41%;钻孔布置在工作面上半部采空区的1/5～2/5采长范围内,其抽放效果最好,钻孔间距应在24～30m 为宜;合理的抽放负压为20～50mm H_2O;抽放效果以正台阶伪斜短壁工作面为最好。 This paper through the liberation of the liberated stratum Methane gas test shows that: This method can solve the problem of gas over the working face of the liberation level, so that the face return air flow gas concentration decreased by 10.8 ~ 41%; drilling layout in the upper half of mining face In the area of ​​1/5 ~ 2/5 mining length, the drainage effect is the best, and the drilling spacing should be between 24 ~ 30m; the reasonable suction negative pressure is 20 ~ 50mm H_2O; the drainage effect is positive Pseudo-oblique shortwall face is the best.