煤矿安全2024，Vol.55Issue(1)：50-56,7.DOI:10.13347/j.cnki.mkaq.20221669
大直径高位定向孔一次钻扩技术及瓦斯抽采效果分析
Analysis of drilling and reaming technique of large diameter high directional hole and gas extraction effect
摘要
Abstract
Aiming at the problems of low comprehensive efficiency and high treatment cost in the conventional treatment of mining pressure relief gas in"U"ventilation mining face,taking a mining face in Jincheng Mining Area,Shanxi Province as the research object,ϕ200 mm large diameter high-position directional borehole for gas control of mining pressure relief is proposed.Based on the analysis of the technical difficulty of large-diameter high-position directional borehole in the roof of the coal mine,the key drilling equipment are selected,including ZDY20000LD directional drilling rig,BLY460 mud pump truck and multi-power expanding drilling tool.The combined strong slag-discharge directional drilling technology and multi-dynamic single-reaming technology have been developed to realize directional drilling of ϕ120 mm high hole and single-reaming of ϕ200 mm hole under complex formation conditions,the comprehensive drilling efficiency is more than 50%higher than that of conventional multi-stage expanding.The gas drainage effect shows that the area of 30-40 m away from the roof and 40 m away from the return air roadway is the mining fracture intensive development area.The average gas drainage concentration in the borehole is maintained at more than 40%and the maxim-um pure amount of gas drainage is 10.94 m3/min,which has remarkable effect.关键词
瓦斯抽采/大直径高位定向钻孔/定向钻进技术/多动力扩孔/双级双速螺杆马达Key words
gas drainage/large diameter high-position directional borehole/directional drilling technology/multi-power expanding/two stage and two speed screw motor分类
矿业与冶金引用本文复制引用
杨伟锋,刘建林,刘飞,赵建国,褚志伟..大直径高位定向孔一次钻扩技术及瓦斯抽采效果分析[J].煤矿安全,2024,55(1):50-56,7.基金项目
陕西省重点研发计划资助项目(2022GY-157) （2022GY-157）
中煤科工集团西安研究院有限公司科技创新基金资助项目(2020XAYJS01) （2020XAYJS01）
