METHOD FOR PRELIMINARY DEGASSING OF COAL-BEARING STRATA

摘要

Method for preliminary degassing of coal bearing strata includes formation of special technological channels, drilling of degassing wells, burning out coal by method of gasification in coal seam with bedding under production strata with following gravitational sagging of the strata. Preliminary degassing is performed after breakage of coal-bearing strata over burn-out zone, and for gasification one mostly uses un-conditional coal seam with thickness approximately 0.2-0.5 m with bedding under production coal-bearing strata.