METHOD OF LEACHING MINERAL DEPOSITS FROM PRODUCING FORMATION Russian patent published in 2015 - IPC E21B43/28 

FIELD: mining operation.

SUBSTANCE: invention can be used in particular in underground leaching unconsolidated sediments containing Cu, Au, Mo, U, NaCl, MgCl₂ 6H₂O, and others. The method of leaching the mineral deposits from the producing formation comprises drilling injection and production bores, feeding the leach solution through the injection bore and pumping the productive solution through the production bore. Drilling the injection and production bores is carried out in one direction, placing the production bores under the injection bores. After drilling the first pair of the injection and the production bores drilling the next pairs of bores is carried out in a clockwise direction from the first pair with the pitch of 45°, and supplying the leach solution is carried out after the drilling of the next pair of bores. After pumping the productive solution the used bores are choked and new bores are drilled counter-clockwise with the pitch from the first injection and production bores of 22.5°, and the following - of 45°. At oblique occurrence of ore bed, drilling of injection and production bores is carried out under the angle of occurrence of the ore bed.

EFFECT: increased efficiency of leaching of mineral deposits.

2 cl, 2 dwg