ABSTRACT
The traditional measures to deal with types of advancing fires were putting in plaster/protective coating over the sighted fire advancement points to stop creeping of air within—which often fails, creating new air entry ports. In case of appreciable air leakages through stoppings, cracks and fractured strata—the leakage points can be identified using smoke generation tubes soaked with pumice stone. Normally, negative pressure zones is identified from a systematic record of pressure differential measurements across stoppings. Radio active tracer gas like Krypton is known to be used for evaluating the amount of leakages within a goaf. Different types of surface protective coatings are in use in different countries for leak proofing the fire stoppings or improving upon resistance of the packing in gate roads in advancing types of long wall mines or, for consolidating crushed coal surfaces in roof, pillars or barriers.
