METHOD FOR ISOLATION OF EMERGENCY AREA AT COAL BED UNDERGROUND DEVELOPMENT Russian patent published in 2012 - IPC E21F5/00 E21F17/103 

FIELD: mining.

SUBSTANCE: method includes well drilling between the surface and roof of isolated underground working and construction of isolating barrier on the way of fire movement in the isolated underground working and pumping the isolating filling agent into the working. Note that the cavity is created along the whole width of working roof, for example, by blasting the explosive substance charges in the lower part of the well, the height of which is defined by proportion. Grinded rock is supplied from the surface to the rock crushed by explosion and rocky embankment is created on the ground of isolated underground working. Quick-hardening cement is supplied to the rocky embankment, note that the supply of quick-hardening cement is done at time intervals equal to the period of quick-hardening cement setting. The supply of quick-hardening cement is stopped at the height of isolating barrier satisfying the proportion.

EFFECT: increase of reliability of emergency area isolation at underground fires and reduction of material and labour costs.

2 dwg