METHOD FOR UNDERGROUND LEACHING OF MINERALS Russian patent published in 1997 - IPC

FIELD: mining industry. SUBSTANCE: method implies exposing of ore body by alternating rows of pumping-in and pumping-out boreholes, pumping in leaching solution and pumping out productive solution through respective boreholes. Pumping-in is started at maximal concentration of reagent in leaching solution which is maintained constant at initial period. Then concentration of reagent is continuously reduced according to mathematical relation taking into consideration shortest flow way of leaching solution between nearest pumping-in and pumping-in and pumping-out boreholes, filtering speed along shortest solution flow way, leaching period, preset time interval, permanent coefficient, and distance between boreholes in a row. EFFECT: high efficiency. 1 cl, 1 dwg