METHOD FOR PREVENTING EXPLOSION-HAZARD ACCUMULATIONS OF GASES AND DUST IN COAL DESTRUCTION ZONE Russian patent published in 2015 - IPC E21F5/04 E21C35/22 

FIELD: mining.

SUBSTANCE: invention proposes a method for prevention of explosion-hazard accumulations of gases and dust in a coal destruction zone, which involves extraction of coal samples from a bed, determination of yield ratio of substances of coal, its gas-bearing capacity, content of fusinite and dust, supply of cooling liquid to a cutter surface and an air-water mixture to the coal destruction zone. Supply of the cooling liquid and the air-water mixture is performed at equal pressure of the liquid in channels of a cutter holder. The cooling liquid is supplied to the cutter surface in a compact form at destruction of coal with the cutter, and liquid in the air-water mixture is dispersed with a possibility of binding explosion-hazard dust fractions; with that, it is supplied via the channel of the cutter holder tangentially to an external cavity of a sleeve with its internal ejecting channel.

EFFECT: implementation of the method will allow increasing safety of mining operations on gas-bearing beds, the coals of which tend to dust explosiveness, due to high efficiency of prevention of explosion-hazard accumulations of gases and dust during destruction of coal with an actuating element of a combined machine.