煤巷条带超高压水力割缝增透试验  

Experimental Study on Anti-reflection of Ultra-high Pressure Hydraulic Seam in Coal Roadway

作　　者：骆家宁 谢雄刚[1] 杨家向 熊欣标 梁海彬 曹文梁 LUO Jianing;XIE Xionggang;YANG Jiaxiang;XIONG Xinbiao;LIANG Haibin;CAO Wenliang(College of Mining,Guizhou University,Guiyang 550025,China;Panzhou Energy Bureau of Guizhou Province,Liupanshui 553537,China;ShenyangResearch InstituteCo.,Ltd.of CCTEG,Shenyang110015,China)

机构地区：[1]贵州大学矿业学院,贵州贵阳550025 [2]贵州省盘州市能源局,贵州六盘水553537 [3]中煤科工集团沈阳研究院有限公司,辽宁沈阳110015

出　　处：《湖南科技大学学报（自然科学版）》2023年第1期19-24,共6页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：国家自然科学基金资助项目(51864009,52164016);贵州省教育厅青年成长人才项目资助(黔教合ky字[2018]414)。

摘　　要：针对林华煤矿20917综采工作面瓦斯治理时间长、难度大和透气性低导致的瓦斯抽采效率差等问题,对超高压水力割缝技术进行了研究和利用,以本矿煤巷条带区域9^(#)煤层为试验对象进行卸压增透,提高瓦斯抽采效率,降低在抽采过程中伴随的煤与瓦斯突出风险.设计布置了割缝钻孔和普通钻孔进行对比,并记录了9^(#)煤层割缝前后的钻孔和瓦斯抽采数据进行分析.结果表明:割缝钻孔平均排出的煤屑量为3.3 t,日平均瓦斯抽采浓度相比普通钻孔提高1.61倍,瓦斯抽采纯量相比普通钻孔提高了约2.04倍.超高压水力割缝技术可对煤层的透气性进行较大程度的改善,且能有效地提高瓦斯抽采效率,可以解决由于低透气性带来的煤巷条带煤层掘进速率问题.Aiming at the problems of gas extraction efficiency caused by long time and difficulty in 20917 fully mechanized coal face of Linhua Coal Mine,and low permeability,the ultra-high pressure hydraulic seam cutting technology is studied and analyzed.The No.9 coal seam in the coal lane strip area of the mine is taken as the test object for pressure relief and permeability improvement,so as to improve the efficiency of gas extraction and reduce the risk of coal and gas outburst in the extraction process.The slit drilling and ordinary drilling are compared,and the drilling and gas extraction data of No.9 coal seam before and after seam cutting are recorded for analysis.Results show that the average amount of coal cuttings discharged from slotted boreholes is 3.3 t,the daily average gas drainage concentration is 1.61 times higher than that of ordinary boreholes,and the net gas drainage amount is about 2.04 times higher than that of ordinary boreholes.Ultra high pressure hydraulic slotting technology can greatly improve the permeability of coal seam,effectively improve the gas drainage efficiency,and solve the problem of coal roadway strip coal seam tunneling rate caused by low permeability.

关 键 词：煤巷条带 超高压水力割缝 低透气性 瓦斯抽采 

分 类 号：TD712[矿业工程—矿井通风与安全]