METHOD OF MINE FIELD DEGASSING Russian patent published in 2012 - IPC E21F7/00 

FIELD: mining.

SUBSTANCE: method includes drilling of gas-suction wells from the mine of the first extraction pillar into a coal and rock massif of undermined and overmined coal beds, sealing of wells, their connection to a manifold gas line and gas suction. Gas-suction wells are drilled in separate clusters at the distance from the mining face of the mined bed, corresponding to the sum of distances along the normal line from this bed in zones of its unloading accordingly to undermined and overmined coal beds. As another cluster of gas-suction wells is drilled, dynamic impact at the coal and rock massif of undermined and overmined coal beds is carried out from the bottomhole part of every well. For that purpose after sealing of the cluster of gas-suction wells an ampoule with hot liquid is sent in addition into each of them, for instance, with petrol or kerosene, equipped with two facilities of explosion initiation, one of which is located at the side of the gas-suction well bottomhole, providing for flammable liquid spraying, and the other one - at the side of its head, providing for flammable liquid explosion after its spraying. The cluster of gas-suction wells is connected to the manifold gas line.

EFFECT: improved efficiency of mine field degassing due to intensified gas recovery.

2 cl, 5 dwg