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Experimental data revealing explosion characteristics of methane, air, and coal mixtures
Whenever air and gases mix with pulverised coal, explosions are possible. Such explosions constitute a primary category of safety concerns during coal bed methane mining. This study investigated the explosion parameters and characteristics of methane–air–coal dust mixtures by using an XKWB-1 sealed...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9069593/ https://www.ncbi.nlm.nih.gov/pubmed/35527867 http://dx.doi.org/10.1039/c9ra04416g |
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author | Deng, Jun Qu, Jiao Wang, Qiu-Hong Xiao, Yang Cheng, Yu-Chi Shu, Chi-Min |
author_facet | Deng, Jun Qu, Jiao Wang, Qiu-Hong Xiao, Yang Cheng, Yu-Chi Shu, Chi-Min |
author_sort | Deng, Jun |
collection | PubMed |
description | Whenever air and gases mix with pulverised coal, explosions are possible. Such explosions constitute a primary category of safety concerns during coal bed methane mining. This study investigated the explosion parameters and characteristics of methane–air–coal dust mixtures by using an XKWB-1 sealed explosion system. Maximum explosion pressure (P(max)), maximum explosion pressure rise rate (dP/dt)(max), and explosion index (K) were recorded and calculated. Findings showed that relative to the maximum explosion pressure of an air–methane gas mix P(max-G), that of a gas–dust mixture P(max-GD) was elevated when a 7.0 vol% methane–air mixture coexisted with 500.0 g m(−3) of coal dust in the explosion. P(max-GD) decreased as C(G) increased and increased as V(ad) increased for a methane–air–coal dust mixture. Both P(max-GD) and (dP/dt)(max-GD) increased first, but were diminished with an increase in C(D). The C(opt) values of five coal samples of HC, KZD, DFS, TC, and YMZ were 400.0, 500.0, 500.0, 500.0, and 600.0 g m(−3), respectively. Based on the coal dust explosion pathways, the effects of coal dust volatility on the explosion characteristics were analysed. Finally, with respect to 7.0 vol% methane, the data showed that the explosion index of a gas K(g) was consistently lower than the explosion index of a gas–dust mixture K(m); that is, K(g) < K(m). |
format | Online Article Text |
id | pubmed-9069593 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90695932022-05-05 Experimental data revealing explosion characteristics of methane, air, and coal mixtures Deng, Jun Qu, Jiao Wang, Qiu-Hong Xiao, Yang Cheng, Yu-Chi Shu, Chi-Min RSC Adv Chemistry Whenever air and gases mix with pulverised coal, explosions are possible. Such explosions constitute a primary category of safety concerns during coal bed methane mining. This study investigated the explosion parameters and characteristics of methane–air–coal dust mixtures by using an XKWB-1 sealed explosion system. Maximum explosion pressure (P(max)), maximum explosion pressure rise rate (dP/dt)(max), and explosion index (K) were recorded and calculated. Findings showed that relative to the maximum explosion pressure of an air–methane gas mix P(max-G), that of a gas–dust mixture P(max-GD) was elevated when a 7.0 vol% methane–air mixture coexisted with 500.0 g m(−3) of coal dust in the explosion. P(max-GD) decreased as C(G) increased and increased as V(ad) increased for a methane–air–coal dust mixture. Both P(max-GD) and (dP/dt)(max-GD) increased first, but were diminished with an increase in C(D). The C(opt) values of five coal samples of HC, KZD, DFS, TC, and YMZ were 400.0, 500.0, 500.0, 500.0, and 600.0 g m(−3), respectively. Based on the coal dust explosion pathways, the effects of coal dust volatility on the explosion characteristics were analysed. Finally, with respect to 7.0 vol% methane, the data showed that the explosion index of a gas K(g) was consistently lower than the explosion index of a gas–dust mixture K(m); that is, K(g) < K(m). The Royal Society of Chemistry 2019-08-08 /pmc/articles/PMC9069593/ /pubmed/35527867 http://dx.doi.org/10.1039/c9ra04416g Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Deng, Jun Qu, Jiao Wang, Qiu-Hong Xiao, Yang Cheng, Yu-Chi Shu, Chi-Min Experimental data revealing explosion characteristics of methane, air, and coal mixtures |
title | Experimental data revealing explosion characteristics of methane, air, and coal mixtures |
title_full | Experimental data revealing explosion characteristics of methane, air, and coal mixtures |
title_fullStr | Experimental data revealing explosion characteristics of methane, air, and coal mixtures |
title_full_unstemmed | Experimental data revealing explosion characteristics of methane, air, and coal mixtures |
title_short | Experimental data revealing explosion characteristics of methane, air, and coal mixtures |
title_sort | experimental data revealing explosion characteristics of methane, air, and coal mixtures |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9069593/ https://www.ncbi.nlm.nih.gov/pubmed/35527867 http://dx.doi.org/10.1039/c9ra04416g |
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