复杂软弱煤层的钻孔成孔效果对矿井瓦斯抽采具有重要意义。针对王坡煤矿复杂软弱煤层钻孔施工排渣难、事故率高、成孔难等问题；设计了一种具有高转速、大功率、大扭矩性能的ZDY6000LR型高转速履带式钻机，其最大扭矩6 000 N·m，最大转速400 r/min；通过对钻机的布局、动力头、调角机构、给进机身及液压系统的优化设计，确保在施工过程中能够有效地解决在钻进过程中出现的卡钻、塌孔等问题；开发具有强度高、不易崩齿等优点的ϕ95/ϕ60.3 mm宽翼片插接密封螺旋钻杆，以及具有强度高、断齿风险低等优点的ϕ113 mm、ϕ120 mm、ϕ133 mm三角梯齿PDC钻头。在王坡煤矿3206工作面现场工业性试验表明：该套钻探装备及钻具组合有效解决了施工过程中存在的排渣难、喷孔顶钻等问题，提高了钻孔成孔率，百米以上钻孔成孔率超过70%，为矿井本煤层瓦斯抽采提供了重要支撑。

The drilling effect of complex and weak coal seams is of great significance for gas extraction in mines. A ZDY6000LR high-speed tracked drilling rig with high rotational speed, high power, and high torque performance was designed to address the problems of difficult slag removal, high accident rate, and hole formation during the drilling construction of complex and weak coal seams in Wangpo Coal Mine. The maximum torque was 6 000 N·m and the maximum speed was 400 r/min. The layout, power head, angle adjustment mechanism, feed body, and hydraulic system of the drilling rig were optimized to ensure that the problems such as sticking and collapsing during the drilling process can be effectively solved during the construction process. The ϕ95/ ϕ60.3 mm wide blade insert sealed auger rod with high strength and not easy to break teeth is developed and designed, and the ϕ113 mm, ϕ120 mm, ϕ133 mm triangular ladder PDC bits with high strength and low risk of broken teeth are also designed. The on-site industrial test at the 3206 working face of Wangpo Coal Mine has shown that this set of drilling equipment and drill assembly effectively solved the problems existing in the construction process such as slag discharge difficulty and top drilling of the jet hole, and improved the hole formation rate of the drilling, and the hole formation rate of the drilling above 100 meters was more than 70%, which provided an important support for the gas extraction of the coal seam of the mine.