Drilling Tool Design for Hydraulic Borehole Mining Based on Telescopic Manners of Worm and Worm Wheel

Abstract:

Hydraulic borehole mining provides the advantages of short construction period, environmental protection, low mining cost and great working depth, etc. It has a broad application prospect in the exploitation and utilization of the resources at poor and deep mines in China. In this paper, the characteristics of the traditional hydraulic drilling tools are summarized, the influence of the fixed nozzle on the mining efficiency is analyzed, and the research results are introduced. Based on this, a hydraulic borehole mining drill of independent intellectual property rights was developed according to the telescopic manner of the worm and worm wheel. The drilling tool allows the telescopic movement of the hydraulic jetting device and ensures the adjust of the target distance, thereby increasing the single hole mining area and improving the mining efficiency.