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С. Д. Каім
«Наногазодинаміка газопилових викидів у вугляних шахтах»
609–628 (2012)

PACS numbers: 47.40.Rs, 52.50.Lp, 62.50.Ef, 81.20.Ka, 82.40.Fp, 89.30.A-, 89.60.Gg

On the basis of calculations of one-particle potential of mean forces and molecule work function from sharply unloaded flat surface of liquid methane under conditions of formation pressure, the microscopic approach is developed for an explanation of energies of molecular-kinetic processes, which lead to gas–dust emissions in coal mines. Initial thermodynamic conditions in a methane trap are investigated for its sharp unloading, which can lead to the phenomenon of self-acceleration of emission of molecules and shock-wave generation. Necessary conditions are analysed for both fluidization of coal and dissociation of hydrocarbon molecules under the influence of flat shock wave at its exit from the methane trap into coal. The methane emission, which accompanies gas–dust emissions and considerably exceeds quantity of methane adsorbed in nanopores and dissolved in coal, is associated with a partial dissociation of hydrocarbon molecules under the influence of the shock wave and subsequent energy-favourable formation of methane molecules and carbon nanoclusters. A positive power balance of both the process with shock-wave dissociation and the subsequent generation of significant amount of methane leads to formation of a detonation wave self-sustained by reactive forces. Explosion hazard of coal is caused by its nanoporous structure and initial conditions of formation of the detonation wave in methane traps. At the sizes of nanopores of an order of thickness of shock-wave front, optimal conditions for both the self-maintaining dissociation of molecules and the methane generation are realised. Estimations of flow rate of the emitted methane are presented.