Authors: S.V. Cherdantsev, P.A. Shlapakov, S.I. Goloskokov, V.V. Kolykhalov, V.V. Satonin, G.A. Lipina

Title of the article: Generation and analysis of non-stationary polars of reaction front in the gas flows near the centers of self-heating

Year: 2020, Issue: 5, Pages: 62-68

Branch of knowledge: 25.00.22 Geotechnology (underground, open and construction)s

Index UDK: 622.272: 516.02

DOI: 10.26730/1999-4125-2020-5-62-68

Abstract: Underground mining of coal deposits, as a rule, is accompanied by the manifestation of negative thermophysical and gas-dynamic processes, both in unworked coal and in the atmosphere of mine workings. At the same time, thermophysical processes are caused by the predisposition of coal to kinetic oxidation processes, which result in the formation of points of self-heating in coal accumulations, which lead to an increase in the temperature of rock strata and gas-air mixtures in mine workings. This significantly increases the propensity of gas-air mixtures to initiate deflagration and detonation processes therein, which is particularly dangerous in coal mines. The article discusses the non-stationary flow of gas-air mixtures in the atmosphere of mine workings located in the vicinity of self-heating centers, which are heat sources that create a heat supply zone. The main relations between the thermo - and gas-dynamic parameters of gas-air mixtures crossing the heat supply zone are obtained on the basis of mass, momentum, and energy conservation laws. Diagrams of the polar reaction are built, on the basis of which some regularities of non-stationary deflagration and detonation processes in gas-air flows of mine workings are revealed

Key words: mine workings gas-air mixtures self-heating centers heat supply zone laws of conservation of mass momentum and energy enthalpy reaction front polars compression shock compaction jumps

Receiving date: 19.11.2020

Publication date: 23.12.2020

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