What is Burning in Coal Mines: Methane or Coal Dust?
A. A. Vasil'ev1,2, A. V. Pinaev1, A. A. Trubitsyn1, A. Yu. Grachev1, A. V. Trotsyuk1, P. A. Fomin1, A. V. Trilis1
1Lavrentyev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
2Novosibirsk State University, Novosibirsk, 630090 Russia
Keywords: метан, угольная пыль, горение, детонация, пределы, переход горения в детонацию, шахтные взрывы, подавление взрывов, methane, coal dust, combustion, detonation, limits, deflagration-to-detonation transition, coal mine explosions, explosion suppression
Abstract
Possible scenarios of ignition and explosion development in coal mines are discussed. A principal possibility of complete quenching of detonation and combustion with the use of a sheet consisting of inert particles is experimentally demonstrated. As the detonation quenching process is rather complicated, it is recommended to focus the attention at the initial stage of ignition of the methane-air mixture, when it is possible to ensure effective quenching of the ignition site by using methods of advanced automatic monitoring and control with clear satisfaction of space and time requirements.
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