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

Abstract 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, longwal...

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Autores principales:	Chuang Liu, Huamin Li
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e9d28f4f47464cd89a279ca8a89be1a4
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spelling	oai:doaj.org-article:e9d28f4f47464cd89a279ca8a89be1a42021-12-02T17:45:12ZNumerical simulation of realistic top coal caving intervals under different top coal thicknesses in longwall top coal caving working face10.1038/s41598-021-92624-y2045-2322https://doaj.org/article/e9d28f4f47464cd89a279ca8a89be1a42021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-92624-yhttps://doaj.org/toc/2045-2322Abstract 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.Chuang LiuHuamin LiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Chuang Liu Huamin Li Numerical simulation of realistic top coal caving intervals under different top coal thicknesses in longwall top coal caving working face
description	Abstract 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.
format	article
author	Chuang Liu Huamin Li
author_facet	Chuang Liu Huamin Li
author_sort	Chuang Liu
title	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_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_sort	numerical simulation of realistic top coal caving intervals under different top coal thicknesses in longwall top coal caving working face
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/e9d28f4f47464cd89a279ca8a89be1a4
work_keys_str_mv	AT chuangliu numericalsimulationofrealistictopcoalcavingintervalsunderdifferenttopcoalthicknessesinlongwalltopcoalcavingworkingface AT huaminli numericalsimulationofrealistictopcoalcavingintervalsunderdifferenttopcoalthicknessesinlongwalltopcoalcavingworkingface
_version_	1718379621198594048

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

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