水力冲孔瓦斯增透试验研究
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摘要
为提高新集二矿的煤层透气性,利用水力冲孔的方法对-650 m 1煤西翼截水巷进行1煤水力冲孔试验研究。水力冲孔时水力冲孔抽采影响半径为5~7 m,试验表明钻场水力冲孔后,与试验前相比4#上帮瓦斯抽采浓度和抽采纯量分别提高了12倍和5.3倍。5#下帮瓦斯抽采浓度和抽采纯量分别提高了2.9倍和2.4倍,水力冲孔能够非常有效地增加瓦斯抽采效果。
In order to enhance seam permeability in Xinji No.2 mine,the-650 m 1 western wing sectional roadway was studied by hydraulic flushing method.The influential radius of hydraulic flushing is 5 m to 7 m and the testing results indicate that gas drainage concentration and pure amount in 4#upside increase by 12 times and 5.3 times respectively after hydraulic flushing in boreholes.The gas drainage concentration and pure amount in 5#downside increase by 2.9 times and 2.4 times respectively compared to the ones before tests.Therefore,the gas drainage effect can be improved by hydraulic flushing in boreholes effectively.
In order to enhance seam permeability in Xinji No.2 mine,the-650 m 1 western wing sectional roadway was studied by hydraulic flushing method.The influential radius of hydraulic flushing is 5 m to 7 m and the testing results indicate that gas drainage concentration and pure amount in 4#upside increase by 12 times and 5.3 times respectively after hydraulic flushing in boreholes.The gas drainage concentration and pure amount in 5#downside increase by 2.9 times and 2.4 times respectively compared to the ones before tests.Therefore,the gas drainage effect can be improved by hydraulic flushing in boreholes effectively.
引文
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[4]刘永江,戴广龙,聂凯强.水力冲孔在夹矸低透气性煤层中的应用[J].煤炭技术,2014,33(6):59-61.
[5]王新新,石必明,穆朝民.水力冲孔煤层瓦斯分区排放的形成机理研究[J].煤炭学报,2012,37(3):467-471.
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