International Journal of Earth Sciences and Engineering

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Hydraulic Borehole Mining (HBM) method is an important mining technology that has advantage for some special ore formation. However, the traditional hydraulic borehole mining tool’s nozzle is fixed that limits the single well ore production. In this paper, hydraulic borehole mining tool with ratchet controlled expandable nozzle was designed. High pressure water channel, ore pulp discharge channel and ratchet controlled expandable nozzle are three important parts in this design process. Then, the tool was conducted preliminary filed experiment in nong’an area and infrared camera was used to observing breaking condition of the wall of experiment hole. The experiments showed that the ratchet controlled expandable nozzle can expand and back in the experiment hole. And the hydraulic borehole mining tool can break the wall of experiment hole obviously. This research is a preliminary study that provides an ideal mining method and mining tool for thin ore formation.

Keywords

Hydraulic Borehole Mining, Expandable Nozzle, Design and Field Experiment, Ore Particles.
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