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以郭庄矿为试验矿井,采用Fluent软件对高位钻孔抽采时采空区瓦斯分布规律进行了研究,研究结果表明:随着仰角减小表现越来越明显,并且抽管口上部瓦斯浓度变化要比下部的瓦斯浓度变化大,高位钻孔仰角相同时,钻孔抽采混量、抽采纯量和抽采浓度随着距巷帮距离的增大呈现逐渐减小的趋势。
Taking Guozhuang Mine as a pilot mine, the gas distribution law of goaf in high bit drilling was studied by using Fluent software. The results show that as the elevation angle decreases, the gas distribution becomes more and more obvious, and the upper gas concentration The change of gas concentration is larger than that of the lower part. When the height of the upper borehole is the same, the volume of drilling and pumping, the volume of pure gas and the concentration of extraction and extraction decrease gradually with the increase of the distance from the roadway.