GAS EMISSION CONTROL METHOD AT DEVELOPMENT OF COAL BED PRONE TO SPONTANEOUS IGNITION

摘要

FIELD: mining.;SUBSTANCE: method refers to the field of mining industry, to coal mining industry in particular, and may be used during development of coal beds prone to spontaneous ignition. The method used during development of coal bed prone to spontaneous ignition includes preparation of extraction section by double workings, ventilation of wide section workings due to mine ventilating pressure drop and coalmine methane extraction from emission source. Methane is extracted first through drilled at superimposed beds methane drainage boreholes with possibility of air inleakage exclusion from bottom-hole region of active stope. Then after displacement of developed bed main roof mine rocks, methane is removed through the rest part of borehole length in modes excluding air inleakage from bottom-hole space of long face. Methane, evolving hard from developed bed zones released from overburden pressure near long face bottom-hole, is offtaken to degassing vacuum network of extraction section through formation wells drilled oriented on working face with methane concentration fit for disposal.;EFFECT: improving mining safety during development of coal beds prone to spontaneous ignition.;3 cl, 4 dwg