松软煤层定向长钻孔钻进技术及应用  

Directional long borehole drilling technology and application in soft coal seam

作　　者：陈卫东[1] 吴亿锁 Chen Weidong;Wu Yisuo(Xiangshan Mine,Shaanxi Shanmei Hancheng Mining Co.,Ltd.,Weinan 714000,China)

机构地区：[1]陕西陕煤韩城矿业有限公司象山矿井,陕西渭南714000

出　　处：《煤炭与化工》2024年第7期106-110,136,共6页Coal and Chemical Industry

摘　　要：针对象山矿井3号煤层受采动影响,卸压瓦斯通过顶底板裂隙释放至保护层工作面及采空区,造成上隅角瓦斯浓度高的难题,结合突出矿井高应力软煤层等复杂地质条件,采用复合钻进与滑动定向钻进工艺,利用ZYL-6000D全方位千米钻机配套螺旋钻杆、YSX18矿用随钻测量系统,采用高压氮气钻进技术,在21315综采工作面施工定向长钻孔进行瓦斯抽采,抽采钻孔使用“三堵两注”两相封孔技术,最终形成松软煤层定向长钻孔钻进控制及钻探工艺技术。试验结果表明,ZYL-6000D全方位千米定向钻机配合高强度刻槽钻杆可提高钻进深度和效率,“三堵两注”两相封孔方法对钻孔周围裂隙进行有效封堵,瓦斯抽采浓度大幅度提升,实现松软煤层定向长钻孔瓦斯治理模块化抽采,为矿井安全高效稳定发展提供有力保障。Aiming at the problem of high gas concentration in the upper corner caused by the release of pressure relief gas from the roof and floor cracks to the protective layer working face and goaf in No.3 coal seam of Xiangshan Mine under the influence of mining,combined with the complex geological conditions such as high stress soft coal seam in the outburst mine,the composite drilling and sliding directional drilling technology was adopted,and the ZYL-6000D omni-directional kilometer drilling rig was used to support the spiral drill pipe and YSX18 mine-used measurement while drilling system.The high-pressure nitrogen drilling technology was used to construct directional long boreholes for gas extraction in a working face,and the ' three plugging and two injection ' two-phase sealing technology was used in the extraction boreholes.Finally,the control and drilling technology of directional long drilling in soft coal seam is formed.The test results show that the ZYL-6000D omnidirectional kilometer directional drilling rig with high-strength grooved drill pipe can improve the drilling depth and efficiency.The 'three plugging and two injection 'two-phase sealing method can effectively seal the cracks around the borehole,and the gas extraction concentration is greatly improved.The modular extraction of gas control in directional long boreholes in soft coal seam is realized,which provides a strong guarantee for the safe,efficient and stable development of the mine.

关 键 词：松软煤层 定向长钻孔 “三堵两注”技术 瓦斯抽采 

分 类 号：TD712[矿业工程—矿井通风与安全]