METHOD FOR CONTROL OF SPONTANEOUS FIRES IN MINE WORKINGS WITH USE OF BLOCK MINING SYSTEM Russian patent published in 1994 - IPC

FIELD: control of underground fires. SUBSTANCE: working for discharge of return ventilation current is connected by connections on flank of extraction district to two parallel preliminarily driven lateral workings. Erected in first connected is sluice with normally opened doors, and in the second connection, sluice is made with normally closed doors. In case of fire, pressure in worked-out space is equalized by opening doors in normally opened sluice, and by closing doors in normally open one. EFFECT: higher efficiency. 2 dwg