A mine-drilling rig is widely used in mine workings and its operational efficiency is increasing. It not only should have long penetration length and high torque but also could fix various drilling accidents. In addition, its size should be optimized for assembly to meet coal mine conditions.
Choe Kum Hyok, a researcher at the Faculty of Earth Science and Technology, has designed and constructed a mine-drilling rig suitable for the coal mine conditions in our country, for which he conducted an optimal design of drilling and rotary systems and a stability design of drill pipe pillars.
The mine-drilling rig requires a relatively small space for drilling operations, which can ensure good drilling operations in the conditions of anthracite coal mines in our country with fairly small mine cross-sections. In addition, it needs few high-precision parts and it is easy to manufacture and cost-effective. Since its torque and WOB are relatively big and it can maintain high stability during drilling, it can be used for various purposes including degassing, drainage and exploration wells. And its randomly controllable angle of azimuth and inclination in one position increases penetration efficiency.