The deformation dynamics of the experimental adit's material during a coal dust explosion

Authors

DOI:

https://doi.org/10.15587/1729-4061.2020.209409

Keywords:

explosion, explosive dust-air environment, seismic waves, experimental adit, computer modeling

Abstract

The purpose of this paper is to improve the mechanism that forms an explosive environment within the workings' space from the accumulated coal dust, based on determining the dynamic deformations under the influence of an explosion in the material that contains the examined working. To simulate the dynamic changes in the stressed-deformed state of the rock mass with an experimental adit inside when under the impact of explosive loads, a modern method of finite differences of mathematical-computer modeling has been used. During the research, the mathematical model has been adapted for studying the stressed-strained state of the rock mass that hosts the created experimental adit at the imitation of a dust blast. Additionally, the model takes into consideration the peculiarities of the direct impact of explosion products on the working's wall, as well as their indirect action. The data were acquired on the propagation of the progressive front of seismic waves inside mining rocks that host the experimental working. The parameters of speed and acceleration of the seismic wave components have been established that occur ahead of the shock front, which moves in the gas environment of a mining working during the explosion of a dust-air mixture.

This paper reports data on the dynamic processes occurring in a mining massif and on the surface of the experimental working at the chain explosion of a dust-air mixture. The simulation results have made it possible to confirm the hypothesis about the loosening of dust accumulations under the influence of seismic waves, which emerge significantly ahead of the explosion front moving along the working. The modeling results provide an opportunity to improve the systems of protection or localization of the dust-air or dust-gas-air explosions. The existence of seismic waves ahead of the shock front makes it possible to prepare in advance the means for localizing dust explosions

Author Biographies

Viktor Kostenko, Donetsk National Technical University Shybankova sq., 2, Pokrovsk, Ukraine, 85300

Doctor of Technical Sciences, Professor, Head of Department

Department of Environmental Protection

Yaroslav Liashok, Donetsk National Technical University Shybankova sq., 2, Pokrovsk, Ukraine, 85300

Doctor of Economic Sciences, Professor, Rector

Olena Zavialova, Donetsk National Technical University Shybankova sq., 2, Pokrovsk, Ukraine, 85300

PhD, Associate Professor

Department of Environmental Protection

Serhii Pozdieiev, Cherkasy Institute of Fire Safety named after Chernobyl Heroes of National University of Civil Defense of Ukraine

Doctor of Technical Sciences, Professor, Chief Researcher

Tetiana Kostenko, Cherkasy Institute of Fire Safety named after Chernobyl Heroes of National University of Civil Defense of Ukraine Onoprienka str., 8, Cherkasy, Ukraine, 18034

Doctor of Technical Sciences, Associate Professor

Department of Construction Objects Safety and Labor Protection

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Published

2020-08-31

How to Cite

Kostenko, V., Liashok, Y., Zavialova, O., Pozdieiev, S., & Kostenko, T. (2020). The deformation dynamics of the experimental adit’s material during a coal dust explosion. Eastern-European Journal of Enterprise Technologies, 4(7 (106), 54–62. https://doi.org/10.15587/1729-4061.2020.209409

Issue

Vol. 4 No. 7 (106) (2020): Applied mechanics

Section

Applied mechanics

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Copyright (c) 2020 Viktor Kostenko, Yaroslav Liashok, Olena Zavialova, Serhii Pozdieiev, Tetiana Kostenko

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