AUTOMATIC SYSTEM FOR AIR-GAS WELL EXPLOSION PROTECTION Russian patent published in 2008 - IPC E21F5/00 G08B17/12 A62C4/02 

FIELD: mining, particularly coal mining, namely for combined coal mine breakage face ventilation at the time of gas-sucking plant operation.

SUBSTANCE: system comprises connection channel arranged between flow switch and gas supply channel extending from air-gas well head and pyrometric sensors to provide high-precise air-gas mixture ignition detection. The sensors are arranged inside connection channel from gas supply channel side and are directed towards air-gas mixture flow direction. System has control unit, explosion suppression devices arranged from outer side of connection channel and having nozzles extending inside connection channel, which provide inert gas or other flame-retarding agent injection into connection channel at high velocity.

EFFECT: prevention of air-gas mixture fire and explosion penetration from ground surface through gas-sucking plant inside air-gas wells and underground mines, provision of air-gas mixture fire and explosion suppression at initial stage, increased mining safety and improved combined venting efficiency.

2 dwg