METHOD FOR DEGASATION OF COAL BED BEING DEVELOPED Russian patent published in 2010 - IPC E21F7/00 

FIELD: mining.

SUBSTANCE: invention relates to mining, in particular - to safety engineering during underground development of gas-bearing coal beds with stretching poles with complete roof collapse and may be used for reduction of the production face methane-bearing capacity. The invention effect consists in improved degasation efficiency due to maintenance of the degasation well cross section and throughput capacity as well as their sealing reliability increase. The proposed degasation method involves drilling wells across the roof rock parallel to the production face at a distance of 1-2 m from the coal bed, the spacing between them equal to 0.1-0.2 of the production face length. The degasation wells are sealed in rock and connected to the degasation pipeline. In case of insufficiency of the wells connection to the bed with the help of natural and technogenic cracks using, for example explosion, one additionally creates artificial fissuring. The proposed method is based on usage of the effect of periodical partial unloading of the bed and its immediate roof before the production face during its excavation with a long production face.

EFFECT: method ensures efficient degasation of the bed due to wells positioned in the roof rock and reduction of their sealing and maintenance costs.

3 cl, 2 dwg