COAL-BEARING STRATA DEGASATION METHOD Russian patent published in 2010 - IPC E21F7/00 

FIELD: mining.

SUBSTANCE: invention refers to mining, and namely to development systems of superimposed high gas-bearing coal beds. Method involves driving of drainage working along gas-bearing guiding bed at some distance from scraped bed prior to beginning of development workings on scraped bed. Drainage working is equipped with grid and automatic sealing connection strip and driven in the plane parallel to boundaries of extraction pillar in the area restricted with lines of actual breakage angles and displacement angles directed from bottom of workings of protected bed, and is used as degasation pipeline ventilated individually owing to common well depression. At that, maximum height h between guiding bed and scraped bed in vertical direction is accepted less than 40m, minimum thickness of guiding bed is accepted more than 0.2m, where m - thickness of scraped bed.

EFFECT: reducing duration of degasation, increasing degasation efficiency, reducing methane affluxes from worked out area, effective separation of air flows.

3 dwg