METHOD FOR CONTROL OF GAS RELEASE FROM STRIPPED AREA Russian patent published in 2010 - IPC E21F1/18 E21F7/00 

FIELD: mining.

SUBSTANCE: fresh air is supplied into mining face due to general shaft depression along two courses that delineate extraction pillar. It is discharged along course maintained behind mining face. In zones of active gas release of approximate beds, air impermeable throughput brattices are erected to form gas draining chamber. Part of stripped area adjacent to the latter is zone of methane trapping. Flow of air-methane mixture is formed. One part of flow is drained along gas-draining course into outward line of extraction site. The other one is discharged from stripped area outside the limits of extraction site. Between mining face and zone of maximum gas release of developed bed an additional throughput brattice is installed. The other part of air-methane mix flow is pushed aside in the area of impact of throughput brattices of gas draining chamber in direction of developed bed unloading zone arrangement. Flow of air-methane mix pushed aside is captured in wells for degassing. They are drilled in advance to form gas-draining chamber from maintained course into zone of developed bed unloading. Mouths are arranged behind project area, where gas draining chamber throughput brattice is erected. Bottoms are arranged in zone of maximum gas release of developed bed. Additional throughput brattice is initially installed in course maintained behind mining face in area, where its vertical plane matches vertical plane passing through point, which is projection of bottom in the well nearest to mining face for degassing onto ground of stripped area, and line being perpendicular drawn from specified point to the limit between maintained course and stripped area. As mining face advances, it is displaced in direction of extraction pillar development.

EFFECT: increased efficiency of methane removal, provides for the possibility to create reserve for increased load at bottom.

4 cl, 7 dwg