METHOD FOR HYDRAULIC BOREHOLE MINING Russian patent published in 2017 - IPC E21C45/00 

FIELD: mining.

SUBSTANCE: method includes drilling a production well, placing a hydraulic recovery unit therein, at that agent-feeding strings in the hydraulic recovery unit and a pulp-lifting pipe of the hydraulic unit in production well are arranged eccentrically with for their independent vertical motion, wherein the pressure water conduit of the hydraulic monitor for hydraulic washing is placed outside the pulp-lifting pipe. The borehole hydraulic mining is carried out by placing the suction tip of the airlift of the hydraulic mining unit at the lower boundary of the production bed, and hydraulic washing is carried out independently by vertical movement of the pressure water conduit of the hydraulic monitor along the entire production ore bed opened by production well, providing its caving with continuous formation of stopping chamber increasing both in diameter and in height with an unstable roof and side walls with constant approximation of hydraulic monitor to the constantly distancing face. The ore falling down to the suction plane is hydroweighted by upward water flow of hydraulic monitor for hydroweighing, the water conduit of which is located inside the pulp-lifting pipe of the hydraulic mining unit, sucked in the suction mode under the bed and lifted by the airlift to the surface.

EFFECT: efficient, high performance borehole hydraulic mining of thick flooded deposits with loose rocks non-uniform in strength.

3 cl, 2 dwg