METHOD FOR UNDERGROUND LEACHING OF GOLD-CONTAINING ORES Russian patent published in 1995 - IPC

FIELD: under-ground leaching of gold-containing ores. SUBSTANCE: method for under-ground leaching of gold-containing ores includes injection of leaching solution through injection holes arranged in pairs. In so doing, placed in one of injection holes of each pair within mass of ore is positive electrode, and placed into the other hole, within enclosing rocks, is negative electrode. Leaching solution is injected in form of common salt solution. Distance between the injection wells is determined by mathematic expression. Upon completion of leaching, solution is pumped out of injection holes and injected into withdrawal holes. EFFECT: higher efficiency. 3 cl, 3 dwg