METHOD TO DEGAS COAL-BEARING SERIES Russian patent published in 2013 - IPC E21F7/00 

FIELD: mining.

SUBSTANCE: method to degas coal-bearing series includes construction of a drainage mine along an extraction pillar in the coal-bearing guiding bed at the distance from the mined bed before start of construction of developing entries on the protected bed, using it as a degassing pipeline, which is ventilated separately. At the same time the drainage mine is constructed along the geometrically upper guiding bed in the area limited with fracture lines directed at the side of the protected bed, and it is ventilated due to depression pulled by the fan of local ventilation. Besides, jointly with construction of drainage mains the lower guiding bed is mined, which lies at the distance of not more than S along the normal line from the mined bed, determined by the given mathematical expression. Afterwards the coal bed is mined.

EFFECT: increased extent of methane extraction and reduced duration of degassing.

5 cl, 3 dwg