应用水力压裂技术提高单一低渗煤层瓦斯抽采效果
Using Hydraulic Fracturing Technology to Improve Gas Extraction Effect of Single Low-Permeability Coal Seam
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摘要: 针对单一低渗煤层瓦斯抽采困难的问题,提出采用水力压裂技术压裂煤层增大其透气性,提高瓦斯抽采效果。以鹤壁中泰矿业33071抽放巷为试验点,考察了压裂前后百米钻孔瓦斯流量、瓦斯抽采浓度、抽采流量等参数变化情况。试验结果表明:百米钻孔瓦斯流量提高了1.80～2.68倍,单孔抽采浓度和流量比压裂前分别增大了7.5倍和95倍,煤层透气性系数增加了9～18倍,衰减系数减小了210%～280%。Abstract: Aiming at the problem of gas extraction difficulties in single low-permeability coal seam,the method of using hydraulic fracturing technology to fracture coal seams and increase permeability is proposed,which can improve the effects of gas extraction.Taking 33071 drainage roadway in Hebi Zhongtai mining industry as the test point,through investigating parameters changing situations of drilling gas flow,gas extraction concentration and drainage flow before and after fracturing in hectometer boreholes,the results show that gas flow in hectometer boreholes is improved from 1.80 to 2.68 times;single-hole extraction concentration and flow are increased 7.5 times and 95 times respectively;seam permeability coefficient is increased by 9 to 18 times,while the attenuation coefficient is decreased from 210% to 280%.
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[1] 张国华.本煤层水力压裂致裂机理及裂隙发展过程研究[D].阜新:辽宁工程技术大学,2004. [2] 申宝宏,刘见中,张泓.我国煤矿瓦斯治理的技术对策[J].煤炭学报,2007,32(7):673-679. [3] 赵玉岐,齐黎明.突出煤层透析解突技术研究[J].采矿与安全工程学报,2009,26(1):110-113. [4] 河南煤业化工集团研究院有限责任公司.煤矿井下水力强化抽采瓦斯关键技术及示范[R].郑州:河南煤业化工集团研究院有限责任公司,2012.
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