Zavyalova O.L., Kostenko V.K. Mechanism of development explosions of coal dust in the network of mine workings

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Parent Category: Geo-Technical Mechanics, 2017

Category: Geo-Technical Mechanics, 2017, Issue 135

Geoteh. meh. 2017, 135, 125-136

MECHANISM OF DEVELOPMENT EXPLOSIONS OF COAL DUST IN THE NETWORK OF MINE WORKINGS
 Zavyalova O.L., Kostenko V.K.
Donetsk National Technical University MES of Ukraine

UDC 622.817+622.822.22

Abstract. The aim of the work is to reveal mechanism of formation conditions for the expansion of explosion along working for the choice and validation of effective measures for the prevention of extraordinary situations. Theories which consider conditions and mechanism of development of an aerovision explosion in a network of mine workings are analyzed. From the published research results it is established that the explosion process in the experimental adit have a pulsating character. This leads to the appearance of waves both in the air of the workings (air shock wave), so in the surrounding mining massif (seismic component of the wave energy). It is established, that the expansion velocity of waves in rocks and air differs several times, therefore seismic waves outstrip air ones. The results of these investigations can reveal features of the mechanism of uneven spread of explosions in mine workings by transferring dust deposits on the sole and walls of the workings into a mobile and suspended state with the formation of explosive concentrations. This will provide an opportunity to choose and validation effective measures to prevent the occurrence of explosive situations in the network of mine workings.
Keywords: coal dust, explosive concentration, explosions of dust-air mixtures, propagation of explosive waves.

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About the authors:

Zavyalova Olena Leonidivna, Candidate of Technical .Sciences (Ph. D.), Associate Professor, Associate Professor in the Department of Nature and Environmental Activity, Donetsk National Technical University MES of Ukraine, Pokrovsk, Donetsk Region, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Kostenko Viktor Klimentevich, Doctor of Technical Sciences (D. Sc.), Professor, Head of the
Department of Nature and Environmental Activity, Donetsk National Technical University MES of Ukraine, Pokrovsk, Donetsk Region, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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