PROCESS OF REINFORCEMENT OF ISOLATION AND OPENING OF SECTION ON FIRE Russian patent published in 2000 - IPC

FIELD: mining industry, liquidation of stopping in case of opening of section dangerous to use. SUBSTANCE: process of reinforcement of isolation and opening of section on fire includes pumping of inert foam under pressure over pipe-lines into section on fire which is prepared by mixing of foam former and liquid nitrogen in section on fire. Prior to feed of foam behind stopping collapsible opening canopy-type forms with non-return valve is formed through pipe-line behind it, then space between forms and dome is rendered inert with liquid nitrogen by supplying it over metal hose with heat removal in water collector. Blast operation to break stopping is conducted in protective environment of foam screen by its sequential opening. Opening is performed under constant maintenance of foam plug with utilization of products of disintegration of foam in water collector. EFFECT: increased reliability of isolation of section dangerous to use, reduced usage of material and labor input for reinforcement of isolation and liquidation of stopping. 1 dwg