MECHANISM OF COAL AEROSOL EXPLOSION DEVELOPMENT IN AN EXPERIMENTAL MINE WORKING

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-01-01 DOI:10.17794/rgn.2023.2.10

V. Kostenko, O. Bohomaz, T. Kostenko, A. Berezovskyi

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Abstract

Today there is not enough scientific data on the energy level and the velocity of an explosion in actual mine workings, which have a cross-sectional area larger than experimental mine workings. The objective of the paper is to justify the energy parameters of an explosion in actual mine workings based on the disclosure of the fire front development mechanism when coal dust explodes in an experimental mine working with a limited cross-sectional area. These studies can be the basis for choosing the speed of action and the strength of the means of the localization of dust explosions. The main research method is an experimental and analytical method, based on the analysis of the results of experimental explosions of coal dust in experimental mine workings and theoretical substantiation of the regularities of the development of the velocity and additional energy of the fire front with further extrapolation to the conditions of actual mine workings. It is proposed to supplement the mechanism of explosion development with an idea about the sections of development of explosion dynamics, i.e. initiation, dust explosion, crater, which determine the characteristic parameters of the explosive front velocity: maximum initiating velocity, average velocity, and maximum velocity in a crater. It was established that during methane initiation in the experimental mine working at the boundary between the initiation and dusting zones, there is a situation of a hybrid explosion of a mixture of methane and dust with air, which has its own velocity and energy indicators. A linear dependence of the energy generated during the coal aerosol explosion on the cross-sectional plane of the mine working was established. This makes it possible to use the results of testing the coal from certain deposits in small-scale experimental set-ups to justify the parameters of protective means for the actual mine workings.

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煤矿试验作业中煤粉气溶胶爆炸发展机理

目前，由于实际矿井的爆炸横截面积比实验矿井大，关于爆炸的能级和速度的科学数据还不够。本文的目的是在揭示有限截面积试验矿井煤尘爆炸火锋发展机理的基础上，对实际矿井爆炸的能量参数进行论证。这些研究可作为粉尘爆炸定位手段的作用速度和强度选择的依据。主要的研究方法是实验与分析相结合的方法，通过对实验矿井中煤尘爆炸实验结果的分析，从理论上证实火锋速度和附加能量的发展规律，并进一步外推到实际矿井的情况。在对爆炸发展机理的补充上，提出了爆炸动力学发展的分段，即起爆、粉尘爆炸、弹坑，这些分段决定了爆炸锋面速度的特征参数:最大起爆速度、平均速度和弹坑内最大速度。研究结果表明，在瓦斯起爆区与粉尘区交界的实验矿井中，瓦斯与粉尘的混合物与空气发生混合爆炸，该混合爆炸有其自身的速度和能量指标。建立了煤气溶胶爆炸产生的能量与矿井工作横截面的线性关系。这就有可能利用在小型试验装置中对某些矿床的煤进行测试的结果来证明实际矿井工作中保护措施的参数是合理的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.