LOCALISATION DEVICE OF EXPLOSIONS OF METHANE-AIR MIXTURE AND (OR) PULVIRISED COAL Russian patent published in 2012 - IPC E21F5/14 

FIELD: mining.

SUBSTANCE: device consists of working chamber coaxially arranged in the bunker filled with flame-retardant powder and covered with easily breakable diaphragm, remote metal rod with receiving shield. At that, tail part of working chamber is equipped with auxiliary chamber the volume of which is less than that of the working chamber in which there arranged is differential slide valve with check valve, which separates those chambers. In the housing of auxiliary chamber there made are central and radial channels shutoff in standby mode with a sliding coupling kinematically connected to remote rod and receiving shield. On the outline of sliding coupling there made are holes (openings) interconnected to external environment (atmosphere) with possibility of their being aligned with radial channels at movement of sliding coupling to the corresponding value under action on the receiving shield of air blast wave (external force).

EFFECT: improving reliability and increasing localisation efficiency of explosions of methane-air mixture and pulverised coal of the developed mine workings.

2 cl, 4 dwg