长距离定向钻孔瓦斯抽采技术在青龙煤矿的应用
Application of long-distance directional drilling gas drainage technology inQinglong Coal Mine
【索引】薛海腾,李希建,梁道富,等.长距离定向钻孔瓦斯抽采技术在青龙煤矿的应用[J].工矿千亿国际app下载,2020,46(2):34-38.
【Reference】XUE Haiteng,LI Xijian,LIANG Daofu,et al.Application of long-distance directional drilling gas drainage technology in Qinglong Coal Mine[J].Industry and Mine Automation,2020,46(2):34-38.
【DOI】10.13272/j.issn.1671-251x.2019050022
【作者】 薛海腾1,2,3,李希建1,2,3,梁道富4,陈刘瑜1,2,3,马晟翔1,2,3
【Author】XUE Haiteng1,2,3,LI Xijian1,2,3,LIANG Daofu4,CHEN Liuyu1,2,3,MA Shengxiang1,2,3
【作者机构】1.贵州大学 矿业学院, 贵州 贵阳550025;2.复杂地质矿山开采安全技术工程中心, 贵州 贵阳550025;3.贵州大学 瓦斯灾害防治与煤层气开发研究所, 贵州 贵阳550025;4.贵州黔西能源开发有限公司, 贵州 黔西551507
【Unit】1.Mining College, Guizhou University, Guiyang 550025, China; 2.Engineering Center for Safe Mining Technology under Complex Geologic Condition, Guiyang 550025, China; 3.Institute of Gas Disaster Prevention and Coalbed Methane Development, Guizhou University, Guiyang 550025, China; 4.Guizhou Qianxi Energy Development Co., Ltd., Qianxi 551507, China)
【摘要】贵州省煤矿地质构造复杂、瓦斯含量高、煤层松软,瓦斯治理难度大。为了提高该区域瓦斯治理水平,在青龙煤矿21601工作面运输巷Y3点向前5~205 m处,利用千米钻机进行长距离顺层条带定向钻孔瓦斯抽采技术的现场应用。通过定向钻进技术和分支孔控制技术保证钻孔轨迹控制精度,避免了盲钻、盲抽等现象。应用结果表明:2次煤样检测得到的瓦斯可解吸量分别为1.772 9,2.191 3 m3/t;残余瓦斯含量分别为4.773 9,5.170 4 m3/t,均小于8 m3/t,满足矿井瓦斯抽采的基本要求;平均瓦斯抽采纯量达到1.26 m3/min,比原来提高了12%;与常规钻孔相比,采用定向钻孔抽采的瓦斯体积分数提高了50%,瓦斯治理效果显著。
【Abstract】The coal mines in Guizhou Province have complex geological structures, high gas content, and soft coal seams, making gas management difficult. In order to improve gas management level in the area, at the range of 5-205 m forward from Y3 point of the transportation roadway of 21601 working face in Qinglong Coal Mine, the kilometer drilling rig is used for field application of gas drainage technology of long-distance directional drilling along layer. The directional drilling technology and branch drillings control technology are used to ensure drilling trajectory control accuracy and avoid blind drilling and blind pumping. The application results show that the desorbable gas from two coal samples are 1.772 9, 2.191 3 m3/t, and the residual gas content is 4.773 9, 5.170 4 m3/t, both are less than 8 m3/t, which meet the basic gas drainage requirements of mine. The average gas drainage volume reached 1.26 m3/min, which is 12% higher than the original value. Compared with conventional drilling, volume fraction of the gas extracted by directional drilling increased by 50%, and the gas treatment effect is significant.
【关键词】 瓦斯抽采; 定向钻进; 顺层定向钻孔; 分支孔控制
【Keywords】gas drainage; directional drilling; directional drilling along layer; branch drillings control
【文献出处】工矿千亿国际app下载,2020年2期
【基金】国家自然科学基金资助项目(51874107);贵州省科技计划资助项目(黔科合平台人才〔2018〕5781号)
【分类号】TD712
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