METHOD FOR PRESSURE-SUCTION UNDERGROUND GASIFICATION OF COAL SEAM

摘要

FIELD: underground gasification of coal seams. SUBSTANCE: method for pressure-suction underground gasification of coal seams includes forcing of oxidizer into reaction channel through blast wells and suction from the channel of gasification products through discharge wells. The method is distinguished by the fact that ratio between the total cross-section area of gas discharge and blast wells is set within 1-4 by increasing the number of gas discharge wells or their diameters. As gasification proceeds, this ratio and, also, the amount of blast air and power of smoke exhausters are increased. EFFECT: higher efficiency. 4 dwg