Numerical simulation of realistic top coal caving intervals under different top coal thicknesses in longwall top coal caving working face

In the process of longwall top coal caving, the selection of the top coal caving interval along the advancing direction of the working face has an important effect on the top coal recovery. To explore a realistic top coal caving interval of the longwall top coal caving working face, longwall top coa...

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Autores principales: Liu, Chuang, Li, Huamin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8225838/
https://www.ncbi.nlm.nih.gov/pubmed/34168206
http://dx.doi.org/10.1038/s41598-021-92624-y
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author Liu, Chuang
Li, Huamin
author_facet Liu, Chuang
Li, Huamin
author_sort Liu, Chuang
collection PubMed
description In the process of longwall top coal caving, the selection of the top coal caving interval along the advancing direction of the working face has an important effect on the top coal recovery. To explore a realistic top coal caving interval of the longwall top coal caving working face, longwall top coal caving panel 8202 in the Tongxin Coal Mine is used as an example, and 30 numerical simulation models are established by using Continuum-based Distinct Element Method simulation software to study the top coal recovery with 4.0 m, 8.0 m, 12.0 m, 16.0 m, 20.0 m and 24.0 m top coal thicknesses and 0.8 m, 1.0 m, 1.2 m, 1.6 m and 2.4 m top coal caving intervals. The results show that with an increase in the top coal caving interval, the single top coal caving amount increases. The top coal recovery is the highest with a 0.8 m top coal caving interval when the thickness of the top coal is 4.0 m, and it is the highest with a 1.2 m top coal caving interval when the coal seam thickness is greater than 4.0 m. These results provide a reference for the selection of a realistic top coal caving interval in thick coal seam caving mining.
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spelling pubmed-82258382021-07-02 Numerical simulation of realistic top coal caving intervals under different top coal thicknesses in longwall top coal caving working face Liu, Chuang Li, Huamin Sci Rep Article In the process of longwall top coal caving, the selection of the top coal caving interval along the advancing direction of the working face has an important effect on the top coal recovery. To explore a realistic top coal caving interval of the longwall top coal caving working face, longwall top coal caving panel 8202 in the Tongxin Coal Mine is used as an example, and 30 numerical simulation models are established by using Continuum-based Distinct Element Method simulation software to study the top coal recovery with 4.0 m, 8.0 m, 12.0 m, 16.0 m, 20.0 m and 24.0 m top coal thicknesses and 0.8 m, 1.0 m, 1.2 m, 1.6 m and 2.4 m top coal caving intervals. The results show that with an increase in the top coal caving interval, the single top coal caving amount increases. The top coal recovery is the highest with a 0.8 m top coal caving interval when the thickness of the top coal is 4.0 m, and it is the highest with a 1.2 m top coal caving interval when the coal seam thickness is greater than 4.0 m. These results provide a reference for the selection of a realistic top coal caving interval in thick coal seam caving mining. Nature Publishing Group UK 2021-06-24 /pmc/articles/PMC8225838/ /pubmed/34168206 http://dx.doi.org/10.1038/s41598-021-92624-y Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Liu, Chuang
Li, Huamin
Numerical simulation of realistic top coal caving intervals under different top coal thicknesses in longwall top coal caving working face
title Numerical simulation of realistic top coal caving intervals under different top coal thicknesses in longwall top coal caving working face
title_full Numerical simulation of realistic top coal caving intervals under different top coal thicknesses in longwall top coal caving working face
title_fullStr Numerical simulation of realistic top coal caving intervals under different top coal thicknesses in longwall top coal caving working face
title_full_unstemmed Numerical simulation of realistic top coal caving intervals under different top coal thicknesses in longwall top coal caving working face
title_short Numerical simulation of realistic top coal caving intervals under different top coal thicknesses in longwall top coal caving working face
title_sort numerical simulation of realistic top coal caving intervals under different top coal thicknesses in longwall top coal caving working face
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8225838/
https://www.ncbi.nlm.nih.gov/pubmed/34168206
http://dx.doi.org/10.1038/s41598-021-92624-y
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