FIELD: mining. SUBSTANCE: method includes drilling of reserve mineral deposit with high content in ores of technologically harmful impurities by boreholes. One borehole is sunk up to crossing of underground water flow occurring between two screening horizons and closed by plug. As a result of water passage through deposit rock mass, redistribution of useful components and removal through boreholes of harmful impurities take place. EFFECT: increased quality of mineral raw materials before deposit mining. 3 cl, 1 dwg
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