Original scientific paper

https://doi.org/10.17794/rgn.2022.1.5

MECHANISM OF DEVELOPMENT OF COAL DUST CONTINUOUS EXPLOSION IN A NETWORK OF MINE WORKINGS

Viktor Kostenko ; Donetsk National Technical University, 2, Shybankova Square, Pokrovsk, Donetsk region, 85300, Ukraine
Olena Zavialova ; Donetsk National Technical University, 2, Shybankova Square, Pokrovsk, Donetsk region, 85300, Ukraine
Serhii Pozdieiev ; Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Defence of Ukraine, 8, Onoprienka Street, Cherkasy, 18034, Ukraine
Tetiana Kostenko orcid.org/0000-0001-9426-8320 ; Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Defence of Ukraine, 8, Onoprienka Street, Cherkasy, 18034, Ukraine
Viktor Hvozd ; Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Defence of Ukraine, 8, Onoprienka Street, Cherkasy, 18034, Ukraine

Abstract

The objective of this paper is to reveal the mechanism of creating conditions for the continuous explosion of coal dust by transferring seismic energy to coal dust located along the perimeter of a working. The ANSYS software package was used to model the movement of coal dust particles in the air under the influence of seismic waves caused by the action of an explosion. It was confirmed by modelling that seismic waves, provoked by an explosion, propagate in the rock mass at a higher velocity than the moving explosive front in the air of a working. The qualitative and quantitative behaviour of a layer of coal dust in the process of oscillation of the working walls under the influence of seismic waves during one second was described. The stage of dynamic loosening of the powder is supplemented by the initial period of the mechanism of explosion development, when there are no combustible concentrations of gas or coal traces in the air composition of the mine working before the incident. It is established that under the seismic influence at a distance of about 50 m from the hypocentre of the explosion, a layer of powder-like dispersed coal rises into the air forming a dust cloud, which is the initiator of further continuous development of the explosion spreading in a network of mine workings.

Keywords

explosion; coal dust; modelling; seismic waves; mine workings

Hrčak ID:

271865

URI

https://hrcak.srce.hr/271865

Publication date:

2.2.2022.

Article data in other languages: croatian

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