METHOD FOR COMPLEX EXTRACTION OF COAL BED Russian patent published in 2005 - IPC

FIELD: mining industry.

SUBSTANCE: method includes drilling a system of hydraulically connected wells, directed and horizontal, cased and not cased along coal bed. Hydrodynamic and fire effect on coal bed is performed through these. Gassing and degassing processes for coal bed are performed serially via a system of hydraulically connected wells. In that case degassing process is performed by thermal treatment of channels of coal by counter-flow displacement of burning source after combustion of coal bed in one of wells. Then neutral gas is forced into system of hydraulically connected wells, ignited zone is quenched and coal methane is extracted from several wells, equipped for degassing. Gassing process is performed via repeated combustion through specially drilled vertical well and forcing flow into directed cased wells. Formed combustible gas is drained through directed non-cased wells in direction by normal lines from horizontal transverse well.

EFFECT: higher efficiency.

1 dwg