Modular design of crossing boreholes drilling rig in underground coal mine

A universal platform of 4 300 N·m torque tracked drilling rig is built to fulfil the drilling construction in haulage road, return airway, bed plate tunnel and other conventional working condition in coal mine, particularly the full face crossing boreholes drilling. Adopting modular design idea, a series of drilling rigs with shallow drilling capacity of 300 m are developed and designed rapidly. The universal platform includes mature devices like power head and clamp, as well as new devices such as double column angle adjusting device, feed device, crawler body and hydraulic system, which provides the foundation for the modular and rapid design of the drilling rig. According to different tunnel sizes and underground transportation conditions, the integrated crawler drilling rig and split crawler drilling rig are designed individually. Both of them have the characteristics of large adjustment range of pitch angle / azimuth angle, good flexibility, safe and reliable operation.