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以高瓦斯煤矿极近距离煤层群开采为背景,采用理论分析、数值模拟和现场应用对极近距离煤层群复合采空区瓦斯抽采对采空区气体运移及立体“三带”分布的影响进行研究。研究结果表明:地面钻孔瓦斯抽采对采空区氧化带范围影响很大,地面钻孔抽采量越大,氧化带范围越大。选择合适的瓦斯抽采量,既能实现瓦斯治理效果,又能减少采空区漏风,减小“氧化带”范围。
Based on the mining of extremely close coal seams in high gas coal mines, theoretical analysis, numerical simulation and on-site application of gas drainage in gob of compound coal mined area with extremely close distance coal seams, The impact of distribution is studied. The results show that gas drainage by surface drilling has a great influence on the oxidation zone of goaf, and the larger the amount of ground drilling extraction, the larger the oxidation zone. Select the appropriate gas extraction volume, both to achieve gas treatment effect, but also to reduce the gob of air leakage, reduce “oxidation zone ” range.