影响本煤层瓦斯抽采效果的因素及对策
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摘要
为了提高本煤层瓦斯抽采率,降低煤炭开采时本煤层瓦斯涌出量,探讨了本煤层瓦斯抽采与瓦斯抽放管路漏气、瓦斯抽放管路积水、煤层透气性、瓦斯抽放泵抽放能力等因素的关系,提出了采用聚氨酯+水泥浆封孔,或封孔位置用弹簧软管代替PVC管路进行封孔,人工放水与自动放水相结合,强化受采动影响范围内本煤层钻孔抽放,利用液态CO2致裂技术增加煤层透气性,增大抽放泵能力等方法,结果表明:这些综合技术措施可提高本煤层瓦斯抽采率。
In order to improve the gas extraction rate and reduce the gas emission during coal mining,the influence of gas drainage pipeline leakage,water accumulation in the gas drainage pipeline,coal seam permeability and gas drainage capacity on the gas drainage effect of the coal seam was discussed,the measures of polyurethane + cement slurry sealing,combination of manual drainage and automatic drainage,strengthening borehole drainage in coal seam under the influence of mining,improving coal seam permeability by using liquid carbon dioxide fracturing technology,and increasing drainage pump ability were proposed. The results show that these comprehensive technical measures can improve the gas extraction rate of the coal seam.
In order to improve the gas extraction rate and reduce the gas emission during coal mining,the influence of gas drainage pipeline leakage,water accumulation in the gas drainage pipeline,coal seam permeability and gas drainage capacity on the gas drainage effect of the coal seam was discussed,the measures of polyurethane + cement slurry sealing,combination of manual drainage and automatic drainage,strengthening borehole drainage in coal seam under the influence of mining,improving coal seam permeability by using liquid carbon dioxide fracturing technology,and increasing drainage pump ability were proposed. The results show that these comprehensive technical measures can improve the gas extraction rate of the coal seam.
引文
[1]董恺.浅谈综放工作面仰采时上隅角瓦斯治理[J].陕西煤炭,2016,35(2):97-99.
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[5]董方庭,宋宏伟.巷道围岩松动圈支护理论[J].煤炭学报,1994,19(1):21-31.
[6]中煤国际工程集烤重庆设计研究院,等. GB50471-2008,煤矿瓦斯抽采工程设计规范[S].
[7]王兆丰,董庆祥.煤层透气性系数测定方法的现状研究[J].煤矿安全,2015,46(6):16-19.
[8]薛东杰,周宏伟,唐咸力,等.采动工作面前方煤岩体积变形及瓦斯增透研究[J].岩土工程学报,2013,35(2):328-337.
[9]廖志强,陈东春,刘鑫.采煤工作面卸压带宽度确定及分析[J].能源技术与管理,2012,37(3):18-19.
[10]张红兵.综放工作面超前采动影响范围的确定方法[J].中州煤炭,2005,27(1):3-3,24.
[11]邹德龙,王岩,刘东,等.液态二氧化碳致裂增透技术在下沟煤矿的应用[J].现代矿业,2017(1):206-207,214.
[2] AQ1027-2006,煤矿瓦斯抽放规范[S].
[3]何国益.矿井瓦斯治理实用技术(修订本)[M].北京:煤炭工业出版社,2014.
[4]董恺.蒋家河煤矿瓦斯地质规律影响因素分析[J].陕西煤炭,2015,34(1):45-47.
[5]董方庭,宋宏伟.巷道围岩松动圈支护理论[J].煤炭学报,1994,19(1):21-31.
[6]中煤国际工程集烤重庆设计研究院,等. GB50471-2008,煤矿瓦斯抽采工程设计规范[S].
[7]王兆丰,董庆祥.煤层透气性系数测定方法的现状研究[J].煤矿安全,2015,46(6):16-19.
[8]薛东杰,周宏伟,唐咸力,等.采动工作面前方煤岩体积变形及瓦斯增透研究[J].岩土工程学报,2013,35(2):328-337.
[9]廖志强,陈东春,刘鑫.采煤工作面卸压带宽度确定及分析[J].能源技术与管理,2012,37(3):18-19.
[10]张红兵.综放工作面超前采动影响范围的确定方法[J].中州煤炭,2005,27(1):3-3,24.
[11]邹德龙,王岩,刘东,等.液态二氧化碳致裂增透技术在下沟煤矿的应用[J].现代矿业,2017(1):206-207,214.