METHOD OF DRAINING FIELD DEPOSIT, SUCH AS TUBULAR, OF USEFUL MINERALS ON TRANSITION FROM ITS OPEN MINING TO UNDERGROUND Russian patent published in 2015 - IPC E02D19/10 

FIELD: mining.

SUBSTANCE: substance: the method of drying the field deposit, such as tubular, of useful minerals on transition from its open mining to underground comprises creating the drainage area using the blasting operations at the bottom part of the quarry for the controlled drainage of surface water and groundwater through the raising drain wells, hydraulically connected with the mine drainage system built before the end of the quarrying operations. In operation of the mine drainage the spiral entry is created with the helix pitch angle, greater than the helix pitch angle of the berm, and retention of surface water is carried out by constructing well tanks on the berms of the quarry from the bottom up.

EFFECT: increase in efficiency of the works on draining in the period of transition from open mining to underground mining of useful mineral, reduction of material consumption.

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