METHOD OF LOCALIZATION OF EXPLOSION OF METHANE-AIR MIXTURE AND COAL DUST AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2018 - IPC E21F5/14 

FIELD: mining.

SUBSTANCE: invention relates to the mining industry, in particular to methods and devices for localizing explosions of methane-air mixture and coal dust. To this end, in the method, a primary blasting agent-a flame-extinguishing cloud-is formed by the energy of a compressed gaseous inhibitor, in addition to the powder in the suspended state, in the flow of the shock air wave. At the same time, with the formation of the primary explosive-shielding barrier from the extinguishing powder in the suspended state and the gaseous inhibitor before the propagating flame front, form a secondary barrier from the gaseous inhibitor behind the flame front in the zone of heated explosion products consisting of carbon monoxide, hydrogen and homologues of methane capable of exploding and igniting. Moreover, the secondary explosive-shielding barrier is formed by the energy of a compressed gaseous inhibitor fed into the heated-up explosion product stream, with the possibility of inhibiting explosive mixtures and cooling the temperature on the front of the flame and the products of the explosion, both primary and secondary explosion-blocking barriers form behind it. Also provided is an apparatus for carrying out a process in which a working chamber filled with a compressed gaseous inhibitor is divided, by means of a perforated metal membrane, into two equal containers V1 and V2. At the same time, on the left side of the piston there is a protrusion for supporting metal balls by reducing the diameter of the piston, and in the right part of the piston seals are arranged. Assembly connected to the outboard metal bar is connected to a sliding sleeve made with two grooves to move the supporting metal balls when the device is triggered by the impact air shock. Remote metal rod at both ends is equipped with two shields for receiving the force impact of the shock air wave, both from the side of the extension rod, and from the side of the cone hopper. Hopper for placing the flame-suppressing powder is in the form of a truncated cone.

EFFECT: increasing the efficiency and reliability of localization of methane explosions, but primarily coal dust spreading through a network of mine workings.

4 cl, 3 dwg