通过对超长距大孔径定向钻机系统组成和孔内马达驱动装置的分析,阐述了定向钻孔弯曲机理和钻孔轨迹精确控制技术,同时研究了定向钻机的钻进工艺,并在沙曲煤矿进行工业性试验。试验结果表明:超长距大孔径定向钻机具有显著的技术优势,瓦斯抽采浓度和纯量显著提高,有效解决上隅角和回风流瓦斯超限问题,实现高瓦斯工作面安全高效开采。 Through the analysis of the composition of the system and the motor drive in the bore of the long-range large-diameter large-diameter directional drilling rig, the bending mechanism of the directional drilling and the precise control of the drilling trajectory are described. Meanwhile, the drilling technology of the directional drilling machine is researched. Conduct industrial tests. The test results show that the ultra-long-distance and large-aperture directional drilling machine has significant technical advantages. The concentration and purity of gas drainage are significantly improved, effectively solving the gas overrun problem in upper corner and return air flow, and realizing safe and efficient mining of high-gas face.