Prevention of coal dust and methane explosions in mine workings: theory and practice

I.E. Kolesnichenko, V.B. Artmiev, E.A. Kolesnichenko, V.G. Cherechukin, E.I. Lyubomishchenko

The article deals with the problems of safety in mine workings. The analysis is provided of the existing methods intended for the prevention and isolation of explosions of combustible medium with methane and coal dust. It is proved that the design parameters are not scientifically grounded. The research methodology takes into account the macromolecular structure of combustible substances. Energy characteristics have been estimated with the use of the molecular-kinetic theory. For the calculation of endothermic and exothermic reactions use has been made of the chemical structural method. The rationale is provided for the mechanism of chemical reactions during inflammation and explosion. The description is given of microscopic chemical events in chemical processes and dependences for the estimation of energy for macromolecule disintegration in combustible medium and amount of energy liberated in the process of new substances formation. The role of the environment is discussed in the transfer of thermal energy between combustible elements. The article also describes a method for the assessment of thermodynamic temperature and excess pressure in explosion. It is proved that in the combustion zone the pressure increases in the confined space as a result of temperature rise. The density in gaseous medium is constant. Therefore, the presence of the pressure advance wave is debatable. The proposed method of explosion parameters estimation makes possible the calculation of methane and coal dust explosion limit based on the ultimate analysis of coal seams.

№4 (134) 2017

Key words: combustion, explosion, molecular structure, propagation mechanism, combustible substance, carbon, hydrogen, temperature, pressure, barriers, oil-shale, water, air molecule, energy reproduction.

Mining Industry Journal №4 (134) 2017, p.26