METHOD TO PREVENT IGNITION OF METHANE AND AIR MIXTURE

摘要

FIELD: mining.SUBSTANCE: method to prevent ignition of a methane and air mix includes pneumatic hydraulic irrigation of a coal breaking area, automatic control of methane content by sensors and introduction of an inhibiting gas into a mine atmosphere. Besides, the inhibiting gas is introduced under pressure automatically via a system of pneumatic hydraulic irrigation with achievement of methane concentration in air from 1.9 to 2%, with concentration of inhibiting gas from 0.1 to 2% of the protected volume and the specified content of oxygen in the mine atmosphere. As the methane level drops below 1%, supply of inhibiting gas is automatically stopped.EFFECT: neutralisation of produced methane and air mixes of explosive concentrations and prevention of their ignition.2 cl