COAL BED DEGASSING INTENSIFICATION METHOD Russian patent published in 2019 - IPC E21B43/26 E21C41/00 E21C45/00 

FIELD: mining.

SUBSTANCE: invention relates to mining industry and can be used for degassing coal beds in order to increase safety of work in coal mines, as well as for extraction of methane from coal beds with subsequent use thereof in industry. To implement the method, vertical production wells are drilled directly into the degassed formation in the preparation zone center. Coal methane production zones are created. Fluid supply system is sealed. Fluid under pressure required for formation of hydraulic fracture cracks is injected into production zone of coal methane and formed. Pressure is reduced to operating values by continuous fluid refilling into production wells through one-way valves in the volume of crack opening formed during its hydraulic disintegration. Fluid is extracted in the developed area of production of coal methane, the time of onset of pulsating action on liquid in production wells is determined proceeding from stabilization of its level in the given production wells. Fluid is pumped off and subsequent extraction of coal-bed methane is performed.

EFFECT: reduced time of preparation of the formed production zone of coal methane and reduced probability of cracks closing.

4 cl, 3 dwg