METHOD FOR INCREASING THE GAS OUTPUT OF AN OVERWORKED COAL SEAM UNDER DURING DEGASSING BY WELLS Russian patent published in 2022 - IPC E21F7/00 

FIELD: mining industry.

SUBSTANCE: method for increasing the gas output of the overworked coal seam during degassing by wells has been claimed. The method includes drilling wells into the roof and soil of the seam being overworked. The method also includes sealing their mouths, connecting to a degassing pipeline and extracting gas. Degassing wells at the reclamation area are carried out sequentially, first on the coal seams being overworked, then on the worn coal seam. In addition, drainage wells are arranged in the roof rocks of the seam being worn before drilling wells for the overworked formation. After that, water is drained from wells drilled into the layers being overworked and into the roof rocks. Wells drilled into the coal seam being overworked are sealed to the level of its roof.

EFFECT: increase in the gas output of the overworked seam during degassing by wells.

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