摘要
针对王坡煤矿碎软煤层区域瓦斯治理的需求,对现有气动定向钻进工艺及装备进行优化升级。通过对气动螺杆钻具升级改造,将额定扭矩提升至450 N·m以上;研制的89 mm低风阻螺旋通缆钻杆配套有线通缆测量系统,施工孔深提升至300 m以上;基于“波浪式”精准探测煤层顶底板钻孔轨迹工艺,从侧钻开分支原理出发,改进钻具造斜强度实现快速开分支;系统性分析气动定向工艺在不同地层钻进时轨迹变化特点,形成精准轨迹控制技术,大幅提升施工效率。现场试验期间,共计完成34个主孔,49个分支孔,总进尺17 287 m,平均成孔深度350 m,平均日进尺103 m/d,最高154 m/d,钻孔平均瓦斯抽采体积分数60%以上,百米钻孔抽采纯量是邻近区域普通钻孔2.7倍。
According to the demand of regional gas control in Wangpo Coal Mine crushed soft coal seam area,the pneumatic directional drilling technology was introduced to optimize the existing pneumatic directional drilling process and equipment.Through upgrading the pneumatic screw drilling tool,the rated torque was increased to more than 450 N·m.The 89 mm spiral cable drilling pipe with low wind resistance was developed to realize the construction hole depth of the connected cable measuring system of pneumatic directional drilling to more than 300 m.Based on the tecnique of the“wave type”accurate detection of coal seam top and bottom trajectory,from the principle of directional drilling and branching,the technology of rapid branching is realized by improving the strength of drilling tool.We systematically analyzed pneumatic directional drilling in different strata trajectory variation characteristics,summed up the precise trajectory control technology,and the pneumatic directional drilling process construction efficiency is greatly improved.During the field test,a total of 34 main holes and 49 branch holes were constructed,with a total footage of 17287 m,an average hole depth of 305 m,an average daily footage of 103 m/d and a maximum of 154 m/d.The average extraction concentration of the borehole was above 60%,and the pure extraction volume of the 100-meter borehole was 2.7 times that of the ordinary borehole in the adjacent area.
作者
赵会波
李雨成
ZHAO Huibo;LI Yucheng(Taiyuan University of Technology,Taiyuan 030000,China;Shanxi Tiandi Wangpo Coal Industry Co.,Ltd.,Jincheng 048000,China)
出处
《煤矿安全》
CAS
北大核心
2024年第4期48-54,共7页
Safety in Coal Mines
关键词
气动定向钻进工艺
气动螺杆钻具
低风阻螺旋通缆钻杆
精准轨迹控制
快速开分支
pneumatic directional drilling technology
pneumatic screw drilling tool
low wind resistance spiral cable drill pipe
precise trajectory control
fast branching
