SYSTEMS AND METHODS TO PREVENT GAS EXPLOSION IN A COAL MINE Russian patent published in 2016 - IPC E21F5/00 

FIELD: mining.

SUBSTANCE: invention relates to mining, in particular to a means of preventing the explosion of gas in coal mines. A system to prevent the explosion of gas in coal mines, comprising a module (1) of gas detection for detecting the concentration of methane and the oxygen concentration in the upper corner of the bottom for the coal and a substantially explosion proof control valve (2) connected electrically to the module (1) of gas detection. Thus intrinsically explosion proof control valve (2) is electrically connected to the device (12), producing inert gas into the top corner of the working face in order to reduce the concentration of oxygen and methane concentrations. Furthermore, the system comprises a windshield to prevent ingress of oxygen from the air inlet in the top corner of generating the working face for coal mining. This gas detection unit (1) comprises at least one sensor I (1-1), determining the concentration of methane, for detecting the concentration of methane in the upper corner of the bottom for coal and at least one sensor I (1-2), determining the concentration of oxygen to detect the concentration of oxygen in the upper corner of the face for coal mining. A windscreen comprises a motor I (6-2), a winding drum coupled to the output shaft of the motor I (6-2), and the wind deflector, wound on a winding drum. This winding drum is located between two adjacent separate hydraulic struts to the working face of coal mining in the direction of coal. Moreover, the engine I (6-2) is located on separate racks hydraulic working face to mine coal. When this explosion-proof exhaust side of the control valve (2) is electrically connected to a drive I (6-1) of the motor, and the drive I (6-1), the motor is electrically connected with the motor I (6-2).

EFFECT: technical result is to provide a high reliability, practicality, ease and convenience of operation and improvement of work safety in coal mines.

8 cl, 5 dwg