METHOD FOR UNDERGROUND MINING OF VEIN DEPOSITS Russian patent published in 2013 - IPC E21C41/22 

FIELD: mining.

SUBSTANCE: ore bodies mining is carried out in three stages. At the first stage the balance reserves of the block are either limited by stretching with ore collars and are mined in horizontal layers, or with vertical cutbacks, or, in case of high content of a useful component in balance reserves of veins, ore collars are replaced into artificial ones, which are erected before start of block mining, the size of which along the line of vein stretching is determined on the condition of productive solutions losses at the stage of leaching. At the second stage to the created breaking space used a compensation one, in the entire area of the breaking block they break off-balance reserves of mineralised country rocks in hanging and lying sides of the block by means of serial simultaneous explosion of layers at the side of the hanging and lying side towards to each other. Thickness of the breaking space of the bed broken at each side is determined according to the formula. At the third stage they perform hydraulic insulation of lower horizon mines, useful components are withdrawn from the broken mineralised country rocks of the hanging and lying sides by the leaching method, and rock mass is left for filling of the mined space.

EFFECT: invention makes it possible to increase completeness of deposit reserves withdrawal.

6 dwg