METHOD OF WATER REDUCTION AT EXPLOSIVE PREPARATION TO EXTRACTION OF WATERED MASSIF Russian patent published in 2019 - IPC E02D19/10 

FIELD: mining.

SUBSTANCE: invention relates to mining, to the field of drilling and blasting works in rocks, and can be used in various industries, which use explosive works in flooded massifs of rocks, in particular during explosive preparation of rock mass or ore mass for excavation at open development of minerals. Method of water lowering during explosive preparation to excavation of watered massif includes mine surveying, determination of location of projected wells, advancing drilling of water-lowering wells at the ledge, arrangement and explosion of bottom charges of explosives. Drilling of inclined water-lowering wells is carried out from the side of lower bench of ledge between projected wells. Bottom charge weight correction is performed depending on maximum weight of bottom charge and minimum distance between wells, after that, dispersed bottom charges are placed into inclined water-reducing wells between rows of projected wells, charge data are switched to common blasting network, their blasting, then, after water reduction of the mass, the wells are drilled.

EFFECT: technical result consists in reduction of water level in the massif, increase of stability of rocks in the massif.

1 cl, 5 dwg, 1 tbl