Research on key technology of the design of tracked directional drillingequipment for medium-deep borehole

According to the demand of compact layout design of deep-borehole directional drilling equipment in narrow coal mine underground space, the paper proposed the design philosophy of tracked directional medium-deep-hole drilling equipment which adopted the type of separate layout. Based on the construction condition of the directional drilling in narrow roadway and the deficiency of the application of the existing directional drilling rig, key technologies including the designs of the overall layout, main structure, hydraulic system and slurry pump unit were introduced. The results of field tests showed that all the performance of the present tracked directional medium-deep-hole drilling equipment satisfies the design request, the separate layout design makes the relocation and transportation of the equipment much more flexible, and the present equipment can reduce labor intensity, improve the efficiency of deep-hole directional drilling, and thus increase revenue and reduce expenditure significantly.