SAFETY
Original Paper
UDC 532.593 © A.Yu. Kraynov, A.Yu. Lukashov, O.Yu., Moiseeva, K.M., Kolegov G.A., 2022
ISSN 0041-5790 (Print) • ISSN 2412-8333 (Online) • Ugol’ – Russian Coal Journal, 2022, № 9, pp. 73-78
DOI: http://dx.doi.org/10.18796/0041-5790-2022-9-73-38
Title
EFFECT OF COAL DUST COMBUSTION ON SHOCKWAVE INTENSITY OF A METHANE EXPLOSION IN AN UNDERGROUND MINE
Author
Kraynov A.Yu1, Lukashov O.Yu.2, Moiseeva K.M.1, Kolegov G.F.1
1National Research Тomsk State University, Tomsk, 634050, Russian Federation
2Shakhtekspert-Sistemy LLC, Kemerovo, 650065, Russian Federation
Authors Information
Kraynov A.Yu., Head of the Department of Mathematical Physics, e-mail: akrainov@ftf.tsu.ru
Lukashov O.Yu., Director, e-mail: olukashov@gmail.com
Moiseeva K.M.,Associate Professor of the Department of Mathematical Physics, e-mail: moiseeva_km@t-sk.ru
Kolegov G.A., Graduate Student of the Department of Mathematical Physics, e-mail: zergferr@gmail.com
Abstract
Coal dust is always present in coal mines and is a source of increased fire danger. The issue of the effect of coal dust combustion on explosion-proof distances at the risk of an emergency methane explosion has not been resolved. The article presents the results of a computational and theoretical analysis of the effect of flame propagation through the gas suspension of coal dust raised from the walls of the workings during the passage of a shock wave from an emergency explosion of methane in the preparatory development. The variants when the water barriers installed in the preparatory workings worked or did not work are analyzed. It is established that when the combustion front propagates through the coal dust gas suspension after the methane explosion, an increased pressure is maintained behind the shock wave. The shock wave has intensity slightly greater than in the case when coal dust does not burn. Water barriers provide a significant reduction in the intensity of the shock wave. The proposed approach can be useful for practical application in analyzing the effect of coal dust combustion on the intensity of the shock wave in coal mines during emergency methane explosions.
Keywords
Emergency explosion of methane, Shock wave, Combustion of coal dust gas suspension, Water barriers, Numerical modeling.
References
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Acknowledgements
This work was financially supported by the Russian Science Foundation, Project No. 21-71-10034
For citation
Kraynov A.Yu., Lukashov O.Yu., Moiseeva K.M., Kolegov G.A. Effect of coal dust combustion on shockwave intensity of a methane explosion in an underground mine. Ugol’, 2022, (9), pp. 73-78. (In Russ.). DOI: 10.18796/0041-5790-2022-9-73-78.
Paper info
Received May 16, 2022
Reviewed July 28, 2022
Accepted August 25, 2022
