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为了确定2107底抽巷水力冲孔有效影响半径,利用COMSOL Multiphysics数值模拟软件建立水力冲孔模型,模拟分析不同冲煤量情况下水力冲孔周围瓦斯压力变化规律,结果表明:随冲煤量的增加,水力冲孔后瓦斯抽采效果越为显著。采用压降法对该矿冲煤量1.0 t/m的水力冲孔有效影响半径进行现场考察,实测结果与模拟结果基本一致,说明了水力冲孔卸压增透效果显著。
In order to determine the effective radius of hydraulic punching at the bottom of 2107 roadway, a hydraulic punching model was established by using COMSOL Multiphysics numerical simulation software to simulate and analyze the variation of gas pressure around hydraulic punching with different amount of flushing coal. Increase, after hydraulic punching gas extraction effect is more significant. The pressure drop method was used to investigate the effective radius of hydraulic punching with 1.0 t / m coal flushing. The measured results are basically the same as the simulation results, which shows that the hydraulic punching pressure relief has significant effect.