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Study on coal dust diffusion law and new pneumatic spiral spray dedusting technology at transfer point of mine cross roadway
In order to solve the problem of coal dust pollution at the transfer point, a three-dimensional numerical model of wind flow-coal dust at the loading point of underground rubber run was established by computational fluid dynamics (CFD) discrete particle model and finite element method and k-ε turbul...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9394847/ https://www.ncbi.nlm.nih.gov/pubmed/35994466 http://dx.doi.org/10.1371/journal.pone.0272304 |
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author | Jing, Deji Liu, Hongwei Zhang, Tian Ge, Shaocheng Ren, Shuaishuai Ma, Mingxing |
author_facet | Jing, Deji Liu, Hongwei Zhang, Tian Ge, Shaocheng Ren, Shuaishuai Ma, Mingxing |
author_sort | Jing, Deji |
collection | PubMed |
description | In order to solve the problem of coal dust pollution at the transfer point, a three-dimensional numerical model of wind flow-coal dust at the loading point of underground rubber run was established by computational fluid dynamics (CFD) discrete particle model and finite element method and k-ε turbulence model, and the coal dust diffusion pollution phenomenon caused by the coal flow transfer under the intersection of wind flow in the cross tunnel was studied. Based on the simulation results of wind flow velocity contour, pressure contour and isochronous flow vector distribution, the influence mechanism of wind flow and coal dust characteristics on the distribution of wind flow and coal dust diffusion in the roadway is analysed, and a dust control and reduction system and treatment scheme with new pneumatic screw spray technology as the core is proposed to suppress coal dust pollution at the reloading point. The results of the study show that the wind flow distribution is mainly influenced by the intersection of tape traction and cross-roadway wind flow, showing a complex multi-layer distribution along the roadway and in the normal direction; the diffusion of coal dust of different particle sizes is influenced by the roadway wind flow, and coal dust with particle sizes in the range of 10μm~20μm is more easily diffused, and the dust with particle sizes in the range of 20μm~45μm is mainly collected and suspended near the vortex wind flow at the cross-roadway. The coal dust in the range of 20 μm~45 μm is more likely to gather in the vortex; the treatment system effectively controls the coal dust inside the dust cover, and the spiral-shaped transported droplet particle group formed by the pneumatic spiral spray combines with it efficiently, which verifies the dust control and reduction effect of the pneumatic spiral spray system at the transfer point, and the dust removal efficiency reaches 89.35%~93.06%, which provides relevant theoretical support for the treatment of dust pollution at the coal transfer point in underground coal mines It provides the theoretical support and means to control dust pollution at underground coal transfer points. |
format | Online Article Text |
id | pubmed-9394847 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-93948472022-08-23 Study on coal dust diffusion law and new pneumatic spiral spray dedusting technology at transfer point of mine cross roadway Jing, Deji Liu, Hongwei Zhang, Tian Ge, Shaocheng Ren, Shuaishuai Ma, Mingxing PLoS One Research Article In order to solve the problem of coal dust pollution at the transfer point, a three-dimensional numerical model of wind flow-coal dust at the loading point of underground rubber run was established by computational fluid dynamics (CFD) discrete particle model and finite element method and k-ε turbulence model, and the coal dust diffusion pollution phenomenon caused by the coal flow transfer under the intersection of wind flow in the cross tunnel was studied. Based on the simulation results of wind flow velocity contour, pressure contour and isochronous flow vector distribution, the influence mechanism of wind flow and coal dust characteristics on the distribution of wind flow and coal dust diffusion in the roadway is analysed, and a dust control and reduction system and treatment scheme with new pneumatic screw spray technology as the core is proposed to suppress coal dust pollution at the reloading point. The results of the study show that the wind flow distribution is mainly influenced by the intersection of tape traction and cross-roadway wind flow, showing a complex multi-layer distribution along the roadway and in the normal direction; the diffusion of coal dust of different particle sizes is influenced by the roadway wind flow, and coal dust with particle sizes in the range of 10μm~20μm is more easily diffused, and the dust with particle sizes in the range of 20μm~45μm is mainly collected and suspended near the vortex wind flow at the cross-roadway. The coal dust in the range of 20 μm~45 μm is more likely to gather in the vortex; the treatment system effectively controls the coal dust inside the dust cover, and the spiral-shaped transported droplet particle group formed by the pneumatic spiral spray combines with it efficiently, which verifies the dust control and reduction effect of the pneumatic spiral spray system at the transfer point, and the dust removal efficiency reaches 89.35%~93.06%, which provides relevant theoretical support for the treatment of dust pollution at the coal transfer point in underground coal mines It provides the theoretical support and means to control dust pollution at underground coal transfer points. Public Library of Science 2022-08-22 /pmc/articles/PMC9394847/ /pubmed/35994466 http://dx.doi.org/10.1371/journal.pone.0272304 Text en © 2022 Jing et al https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Jing, Deji Liu, Hongwei Zhang, Tian Ge, Shaocheng Ren, Shuaishuai Ma, Mingxing Study on coal dust diffusion law and new pneumatic spiral spray dedusting technology at transfer point of mine cross roadway |
title | Study on coal dust diffusion law and new pneumatic spiral spray dedusting technology at transfer point of mine cross roadway |
title_full | Study on coal dust diffusion law and new pneumatic spiral spray dedusting technology at transfer point of mine cross roadway |
title_fullStr | Study on coal dust diffusion law and new pneumatic spiral spray dedusting technology at transfer point of mine cross roadway |
title_full_unstemmed | Study on coal dust diffusion law and new pneumatic spiral spray dedusting technology at transfer point of mine cross roadway |
title_short | Study on coal dust diffusion law and new pneumatic spiral spray dedusting technology at transfer point of mine cross roadway |
title_sort | study on coal dust diffusion law and new pneumatic spiral spray dedusting technology at transfer point of mine cross roadway |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9394847/ https://www.ncbi.nlm.nih.gov/pubmed/35994466 http://dx.doi.org/10.1371/journal.pone.0272304 |
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