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Numerical simulation of induced cutting in deep coal

Deep coal cutting is a hot research topic at present. In this paper, the cutting technology of three-drum shearer was proposed based on previous studies. Besides, the influence of confining pressure on coal cutting performance was studied by using the discrete element method, and the induction effec...

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Autores principales: Liu, Si-fei, Lu, Shuai-feng, Wan, Zhi-jun, Zhang, Hong-wei, Xing, Ke-ke
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6774969/
https://www.ncbi.nlm.nih.gov/pubmed/31598286
http://dx.doi.org/10.1098/rsos.190308
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author Liu, Si-fei
Lu, Shuai-feng
Wan, Zhi-jun
Zhang, Hong-wei
Xing, Ke-ke
author_facet Liu, Si-fei
Lu, Shuai-feng
Wan, Zhi-jun
Zhang, Hong-wei
Xing, Ke-ke
author_sort Liu, Si-fei
collection PubMed
description Deep coal cutting is a hot research topic at present. In this paper, the cutting technology of three-drum shearer was proposed based on previous studies. Besides, the influence of confining pressure on coal cutting performance was studied by using the discrete element method, and the induction effect of central cutting on coal cutting performance was discussed. Moreover, coal cutting with different boundary conditions was simulated with the aid of PFC(2D) software. The results show that as the confining pressure increases, the model dominated by tensile failure does not change, but the crack gradually develops from the vertical direction to the free surface of coal. The cutting debris first increases and then decreases; so does the cutting force. Under the effect of central cutting, the crack tends to develop towards the free surface of coal more, and both the peak cutting force and the specific energy consumption increase with the increase of confining pressure. Induced by central cutting, with the increase of confining pressure, the reduction value of peak cutting force increases first and then decreases while the reduction value of cutting specific energy consumption increases.
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spelling pubmed-67749692019-10-09 Numerical simulation of induced cutting in deep coal Liu, Si-fei Lu, Shuai-feng Wan, Zhi-jun Zhang, Hong-wei Xing, Ke-ke R Soc Open Sci Engineering Deep coal cutting is a hot research topic at present. In this paper, the cutting technology of three-drum shearer was proposed based on previous studies. Besides, the influence of confining pressure on coal cutting performance was studied by using the discrete element method, and the induction effect of central cutting on coal cutting performance was discussed. Moreover, coal cutting with different boundary conditions was simulated with the aid of PFC(2D) software. The results show that as the confining pressure increases, the model dominated by tensile failure does not change, but the crack gradually develops from the vertical direction to the free surface of coal. The cutting debris first increases and then decreases; so does the cutting force. Under the effect of central cutting, the crack tends to develop towards the free surface of coal more, and both the peak cutting force and the specific energy consumption increase with the increase of confining pressure. Induced by central cutting, with the increase of confining pressure, the reduction value of peak cutting force increases first and then decreases while the reduction value of cutting specific energy consumption increases. The Royal Society 2019-09-18 /pmc/articles/PMC6774969/ /pubmed/31598286 http://dx.doi.org/10.1098/rsos.190308 Text en © 2019 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
spellingShingle Engineering
Liu, Si-fei
Lu, Shuai-feng
Wan, Zhi-jun
Zhang, Hong-wei
Xing, Ke-ke
Numerical simulation of induced cutting in deep coal
title Numerical simulation of induced cutting in deep coal
title_full Numerical simulation of induced cutting in deep coal
title_fullStr Numerical simulation of induced cutting in deep coal
title_full_unstemmed Numerical simulation of induced cutting in deep coal
title_short Numerical simulation of induced cutting in deep coal
title_sort numerical simulation of induced cutting in deep coal
topic Engineering
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6774969/
https://www.ncbi.nlm.nih.gov/pubmed/31598286
http://dx.doi.org/10.1098/rsos.190308
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