摘要
基于采空区顶板竖"三带"与横"三区"理论,分析了顶板高位定向长钻孔技术瓦斯抽采基本原理与优势,总结归纳了"定向先导孔+扩孔"施工工艺的技术特点,介绍了施工装备系统组成。利用该成孔技术与装备在陕西彬长集团文家坡煤矿4101工作面进行了现场试验,完成顶板高位定向长钻孔2个,累计钻孔进尺1 221 m,单孔主孔深度超过480 m。同时,针对现有顶板高位定向钻孔施工技术存在的问题,提出引入液动冲击辅助碎岩扩孔钻进技术与大直径孔定向钻进技术,进一步增大钻孔终孔直径,提升钻孔施工效率,保证钻孔施工安全。
Based on a theory on a vertical＂three zones＂and lateral＂three blocks＂of goaf roof,the paper analyzed the basic principle and advantages of the gas drainage with the high level directional long borehole drilling technology of the seam roof,summarized and included the technical features of the ＂ directional pilot borehole ＋ reaming＂ construction technology and introduced the composition of the construction equipment system.The boring technology and equipment were applied to conduct a site trial on No.4101 coal mining face in Wenjiapo Mine of Shaanxi Bingchang Group.Two high level directional drillings were completed in the roof with a total drilling mater of 1 221 m and a single main borehole depth over 480 m.Meanwhile,according to the problems existed in the available construction technology of the high level directional drilling in the roof,the paper provided and introduced a hydraulic and percussive secondary rock breaking and remaining drilling technology and large diameter directional drilling technology in order to further increase the final borehole diameter of the drilling,to improve the drilling construction efficiency and to ensure the construction safety of the drilling.
出处
《煤炭科学技术》
CAS
北大核心
2017年第6期137-141,195,共6页
Coal Science and Technology
基金
国家科技重大专项资助项目(2016ZX05045-003
2016ZX05067-001-003)
煤炭科学研究总院技术创新基金资助项目(2016ZYMS015)
关键词
瓦斯抽采
高位钻孔
定向钻进
扩孔
液动冲击
gas drainage
high level borehole
directional drilling
reaming
hydraulic percussion
