DEGASSING METHOD OF WORKING AREA Russian patent published in 2020 - IPC E21F7/00 

FIELD: mining.

SUBSTANCE: invention relates to mining, primarily to coal industry. Invention includes performance of working in a plane of the developed formation, leaving of coal pillars between working areas, drilling of a fan of wells along the adjacent taped formation, connection of wells to a vacuum system of a panel mine section and extraction of methane. Novelty of the invention consists in the fact that the wells of the adjacent formation are made from the bottom of the rock part of the well shaft, the mouth of which is located near the section working with the outgoing air flow, first of fan wells group is performed in parallel to ventilation with outgoing working jet, note here that methane-air mixes are withdrawn from adjoining worked-out space previously worked-out section through previously drilled well in developed formation top of well above interlava pillar of coal. Positive effect is achieved by using technological solutions for rational arrangement of wellheads of degassing wells intended for extracting methane from adjacent taped formation and extraction of methane-air mixtures from adjoining worked-out space through the rock well drilled in the top of the developed formation above the coal interlava pillar.

EFFECT: invention can be used in mines to reduce intensity of methane release into mine section working and maintenance of methane concentration allowable by safety rules at interface of mining face with section mine working.

1 cl, 4 dwg