METHOD FOR PREVENTING EXPLOSIONS OF FLAMMABLE GASES IN WELLS

摘要

FIELD: mining.;SUBSTANCE: method involves insulation of mine workings, increase of flammable gases concentration in them to the values exceeding upper explosion limit of flammable gases, creation of low excess pressure of flammable gas in comparison to atmospheric pressure on the surface. At that, transportation of mine rock to the surface from the well filled with flammable gas is performed through the channel filled with foam. Foam is supplied under the pressure which is more than excess pressure of flammable gas in mine working adjacent to the channel. At that, gas phase of the supplied foam is inert gas, for example nitrogen, and depth of the created foam barrier, which is equal to the channel length, withstands excess pressure of flammable gas in mine workings of the well.;EFFECT: higher safety level of mining operations.;2 cl, 1 dwg