高瓦斯煤层高压水力割缝增透技术试验研究
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摘要
为解决高瓦斯低透气性煤层瓦斯含量高、透气性差、抽采效率低的难题,对切割压力高达100 MPa的高压水力割缝增透技术及装备进行试验研究,研究结果表明:长治矿区3#煤层的合理切割压力75 MPa左右、切割影响范围达6 m,经水力切割增透措施后瓦斯抽采量相比原始钻孔瓦斯抽采量最大提高到12.52倍,高压水力割缝技术大大增加了煤层透气性,提高了煤层瓦斯抽采效率。
In order to solve the problem of poor permeability and low extraction efficiency in high gas and low permeability coal seam, experimental researched the high-pressure hydraulic cutting technology and equipment which cutting pressure up to 100 MPa. The results show that the reasonable cutting pressure of coal seam is about 75 MPa in Changzhi coalfield, the effective radius of gas cutting after hydraulic cutting can be reached more than 6 meters, and the amount of gas drainage about the hydraulic cut drilling can be increased 12.52 times. Which greatly indicated that the high-pressure hydraulic cutting technology increased permeability of the coal seam and improved efficiency of gas drainage in coal seam.
In order to solve the problem of poor permeability and low extraction efficiency in high gas and low permeability coal seam, experimental researched the high-pressure hydraulic cutting technology and equipment which cutting pressure up to 100 MPa. The results show that the reasonable cutting pressure of coal seam is about 75 MPa in Changzhi coalfield, the effective radius of gas cutting after hydraulic cutting can be reached more than 6 meters, and the amount of gas drainage about the hydraulic cut drilling can be increased 12.52 times. Which greatly indicated that the high-pressure hydraulic cutting technology increased permeability of the coal seam and improved efficiency of gas drainage in coal seam.
引文
[1]袁亮,林柏泉,杨威.我国煤矿水力化技术瓦斯治理研究进展及发展方向[J].煤炭科学技术,2015,43(1):45-49.
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[7]赵东,赵阳升,冯增朝.结合孔隙结构分析注水对煤体瓦斯解吸的影响[J].岩石力学与工程学报,2011,30(4):686-692.
[8]冯增朝,赵东,赵阳升.块煤含水率对其吸附性影响的试验研究[J].岩石力学与工程学报,2009,28(S2):3 291-3 295.
[9]于洪,陆庭侃.高压水射流切割喷嘴的结构设计和参数优化数值模拟研究[J].机床与液压,2009,37(11):90-92,135.
[10]于洪,陆庭侃.高压水射流割缝提高瓦斯抽放效率的研究[J].煤炭科学技术,2009,37(3):44-46.
[11]魏佳男,张鹏鹏,李定启,等.低透气性煤层水力割缝优化方案[J].煤炭技术,2015,34(12):156-158.
[2]李晓红,卢义玉,赵瑜,等.高压脉冲水射流提高松软煤层透气性的研究[J].煤炭学报,2008,33(12):1 386-1 390.
[3]刘勇,卢义玉,李晓红,等.高压脉冲水射流顶底板钻孔提高煤层瓦斯抽采率的应用研究[J].煤炭学报,2010,35(7):1 115-1 119.
[4]李晓红,王晓川,康勇,等.煤层水力割缝系统过渡过程能量特性与耗散[J].煤炭学报,2014,39(8):1 404-1 408.
[5]林柏泉,吕有厂,李宝玉,等.高压磨料射流割缝技术及其在防突工程中的应用[J].煤炭学报,2007(9):959-963.
[6]林柏泉,孟凡伟,张海宾,等.基于区域瓦斯治理的钻割抽一体化技术及应用[J].煤炭学报,2011,36(1):75-79.
[7]赵东,赵阳升,冯增朝.结合孔隙结构分析注水对煤体瓦斯解吸的影响[J].岩石力学与工程学报,2011,30(4):686-692.
[8]冯增朝,赵东,赵阳升.块煤含水率对其吸附性影响的试验研究[J].岩石力学与工程学报,2009,28(S2):3 291-3 295.
[9]于洪,陆庭侃.高压水射流切割喷嘴的结构设计和参数优化数值模拟研究[J].机床与液压,2009,37(11):90-92,135.
[10]于洪,陆庭侃.高压水射流割缝提高瓦斯抽放效率的研究[J].煤炭科学技术,2009,37(3):44-46.
[11]魏佳男,张鹏鹏,李定启,等.低透气性煤层水力割缝优化方案[J].煤炭技术,2015,34(12):156-158.