RECIRCULATION VENTILATION INSTALLATION Russian patent published in 2010 - IPC E21F1/08 

FIELD: mining.

SUBSTANCE: proposed installation comprises blower with nozzle arranged in underground recirculation channel, bulkhead and shell with self-sealing valve. Aforesaid shell is arranged in crosswise wedge-like bulkhead along underground recirculation channel that communicates air feed and vent channels. Gaps between shell and aforesaid bulkhead are sealed. Aforesaid blower is arranged on one side of the shell, while on other side a self-sealing valve is fitted. In partial air reuse, said valve is open, while in changing into airing conditions with recirculation, said valves shuts off the shell. Support bulkhead is mounted at intersection of air recirculation and ventilation channels. Ventilation or recirculation channel accommodates sensors that serve to control quantitative and qualitative parametres of recirculated air and installation overall control unit.

EFFECT: higher safety, reliability and efficiency.

7 cl, 2 dwg