METHOD FOR EXTRACTION OF URANIUM ORES, LYING IN STABLE ROCKS, BY UNDERGROUND LIXIVIATION IN CHAMBERS Russian patent published in 2005 - IPC

FIELD: mining industry.

SUBSTANCE: method includes filling drain mines with crushed complex coals before feeding working solutions for cased ore. Crushed complex coals are combusted in drain mines. Hot gases from drain mines are forced into chamber via ventilator. Wastes of hot gases from chamber are sent through irrigation chambers, system of irrigation pipelines into irrigation mines and along ventilation mines to surface. Heating of cased ore is stopped when reaching temperature of hot gases in output jet from chamber of no less than +100 degrees Celsius. After stopping heating of cased ore, working solutions are sent to lixiviation chamber. With decrease of concentration of useful component in productive solutions to extreme limit feeding of working solutions into chamber is stopped and heating of cased ore is repeated. After stopping of heating of cased ore working solutions are fed into chamber. Then, lixiviation of cased ore in chamber is performed until full extraction of deposits with alternation of heating and cased ore irrigation in turns. Collection of productive solutions is performed through drain mines. As complex coals, coals containing uranium and vitrinite are taken.

EFFECT: lower costs.

2 cl, 2 dwg