CRYOLITHOZONE RESIDUAL-MONOLITHIC DEEP-BURIED GOLD PLACER DEPOSITS SECONDARY UNDERGROUND TREATMENT ECO-GEOTECHNOLOGICAL METHOD Russian patent published in 2019 - IPC E21C41/22 B03B7/00 C22B3/00 C22B11/00 

FIELD: mining.

SUBSTANCE: invention relates to the mining industry, and can be used in the previously developed frozen deep-buried gold placer deposits of the North mine fields remaining sections secondary underground mining. Cryolithozone residual-monolithic deep-buried gold placer deposits secondary underground treatment eco-geotechnological method provides for the each mine field mining in two stages within two years. In the winter period (stage 1), performing the penetrating of opening preparatory and rifled workings, as well as the mining operations performance using chamber systems in the direct way. Spent cleaning space is enclosed, fastened with temporary lining, performing the preparatory works underground and on the surface. For the summer period, the mine is temporarily preserved and performing the primary gold production gale-lixiviation dumps loading into the gold-bearing geomaterials spent treatment space in the form of piles, which are then heated with atmospheric heat using the heat pipes. After that, performing their impregnation with the leaching solution, injected from the surface through perforated pipes, followed by the productive solution collection and pumping out to the surface for the useful component extraction. Then, in the winter period (stage 2), performing the monoliths processing by the reverse stroke with subsequent performance of all the above operations in winter and summer. As the mining field is developed, performing the amortized mine backfilling with the frozen overburden rocks and pebble geo material of the placer secondary mining.

EFFECT: invention makes allows to obtain the additional metal, to prevent the earth's surface deformation above the spent mine fields, to restore the terrain and the technogenically disturbed rock mass continuity.

1 cl, 2 dwg