METHOD OF HYDRAULIC BOREHOLE MINING IN HARD ROCKS Russian patent published in 2000 - IPC

FIELD: mining industry; applicable in hydraulic borehole mining of minerals. SUBSTANCE: method includes drilling of vertical producing holes, their equipment with washing out, pulp-lifting devices and device for supporting of rocks of bed roof. Mining process is carried out by stages. Producing holes intersect orebody and are charged with explosives on section within bed interval. Charged explosives are blasted to form initial compensation chamber due to subsequent washing-out of rocks broken by blast. Volume of initially formed compensation chamber corresponds to volume of loosened rock mass from subsequent stage of mining and serves for accommodation of drilling equipment, equipment for hydraulic washing-out and roof support of worked bed. EFFECT: higher process and ecological efficiency of method application. 3 dwg