Mechanism of development of coal dust continuous explosion in a network of mine workings

Authors

  • 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 https://orcid.org/0000-0003-2834-5900
  • 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 https://orcid.org/0000-0002-9085-0513
  • Tetiana Kostenko National University of Civil Defence of Ukraine https://orcid.org/0000-0001-9426-8320
  • 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

DOI:

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

Keywords:

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

Abstract

The objective of the paper is to reveal the mechanism of creating conditions for 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 of 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 the explosion, propagate in the rock mass at a higher velocity than the moving explosive front in the air of a working. 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 accident. 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.

Author Biographies

Viktor Kostenko, Donetsk National Technical University, 2, Shybankova Square, Pokrovsk, Donetsk region, 85300, Ukraine

doctor of technical sciences, professor, head of the department of environmental activities, 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

PhD, associate professor, associate professor of the department of environmental activities, 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

doctor of technical sciences, professor, chief researcher, 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, National University of Civil Defence of Ukraine

doctor of technical sciences, professor, associate professor of the department  of construction objects safety and labor protection, 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

PhD, professor, head of Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Defence of Ukraine, 8, Onoprienka Street, Cherkasy, 18034, Ukraine

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Published

2022-02-01

How to Cite

Kostenko, V., Zavialova, O., Pozdieiev, S., Kostenko, T., & Hvozd, V. (2022). Mechanism of development of coal dust continuous explosion in a network of mine workings. Rudarsko-geološko-Naftni Zbornik, 37(1). https://doi.org/10.17794/rgn.2022.1.5

Issue

Vol. 37 No. 1 (2022): No. 57

Section

Mining

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