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Numerical Investigation on the Compressive Behavior of Desert Sand-Based Backfill Material: Parametric Study

As a key node in the promotion of the “Western Development” strategy in Xinjiang, China, the large-scale mining of coal resources is bound to cause a series of ecological and environmental problems, such as surface subsidence. Desert areas are widely distributed in Xinjiang, and from the perspective...

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Autores principales: Yan, Haitian, Liu, Honglin, Li, Guodong, Wang, Xiangyu, Hang, Yinjian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10223088/
https://www.ncbi.nlm.nih.gov/pubmed/37241506
http://dx.doi.org/10.3390/ma16103878
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author Yan, Haitian
Liu, Honglin
Li, Guodong
Wang, Xiangyu
Hang, Yinjian
author_facet Yan, Haitian
Liu, Honglin
Li, Guodong
Wang, Xiangyu
Hang, Yinjian
author_sort Yan, Haitian
collection PubMed
description As a key node in the promotion of the “Western Development” strategy in Xinjiang, China, the large-scale mining of coal resources is bound to cause a series of ecological and environmental problems, such as surface subsidence. Desert areas are widely distributed in Xinjiang, and from the perspective of reserves and sustainable development, it is crucial to fully utilize desert sand to make filling materials and predict its mechanical strength. In order to promote the application of High Water Backfill Material (HWBM) in mining engineering, a modified HWBM doped with Xinjiang Kumutage desert sand was used to prepare a desert sand-based backfill material, and its mechanical properties were tested. The discrete element particle flow software PFC3D is used to construct a three-dimensional numerical model of desert sand-based backfill material. The parameters such as sample sand content, porosity, desert sand particle size distribution, and model size are changed to study their impact on the bearing performance and scale effect of desert sand-based backfill materials. The results indicate that a higher content of desert sand can effectively improve the mechanical properties of HWBM specimens. The stress–strain relationship inverted by the numerical model is highly consistent with the measured results of desert sand-based backfill materials. Improving the particle size distribution of desert sand and reducing the porosity of filling materials within a certain range can significantly improve the bearing capacity of desert sand-based backfill materials. The influence of changing the range of microscopic parameters on the compressive strength of desert sand-based backfill materials was analyzed. This study provides a desert sand-based backfill material that meets the requirements of mine filling, and predicts its strength through numerical simulation.
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spelling pubmed-102230882023-05-28 Numerical Investigation on the Compressive Behavior of Desert Sand-Based Backfill Material: Parametric Study Yan, Haitian Liu, Honglin Li, Guodong Wang, Xiangyu Hang, Yinjian Materials (Basel) Article As a key node in the promotion of the “Western Development” strategy in Xinjiang, China, the large-scale mining of coal resources is bound to cause a series of ecological and environmental problems, such as surface subsidence. Desert areas are widely distributed in Xinjiang, and from the perspective of reserves and sustainable development, it is crucial to fully utilize desert sand to make filling materials and predict its mechanical strength. In order to promote the application of High Water Backfill Material (HWBM) in mining engineering, a modified HWBM doped with Xinjiang Kumutage desert sand was used to prepare a desert sand-based backfill material, and its mechanical properties were tested. The discrete element particle flow software PFC3D is used to construct a three-dimensional numerical model of desert sand-based backfill material. The parameters such as sample sand content, porosity, desert sand particle size distribution, and model size are changed to study their impact on the bearing performance and scale effect of desert sand-based backfill materials. The results indicate that a higher content of desert sand can effectively improve the mechanical properties of HWBM specimens. The stress–strain relationship inverted by the numerical model is highly consistent with the measured results of desert sand-based backfill materials. Improving the particle size distribution of desert sand and reducing the porosity of filling materials within a certain range can significantly improve the bearing capacity of desert sand-based backfill materials. The influence of changing the range of microscopic parameters on the compressive strength of desert sand-based backfill materials was analyzed. This study provides a desert sand-based backfill material that meets the requirements of mine filling, and predicts its strength through numerical simulation. MDPI 2023-05-22 /pmc/articles/PMC10223088/ /pubmed/37241506 http://dx.doi.org/10.3390/ma16103878 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Yan, Haitian
Liu, Honglin
Li, Guodong
Wang, Xiangyu
Hang, Yinjian
Numerical Investigation on the Compressive Behavior of Desert Sand-Based Backfill Material: Parametric Study
title Numerical Investigation on the Compressive Behavior of Desert Sand-Based Backfill Material: Parametric Study
title_full Numerical Investigation on the Compressive Behavior of Desert Sand-Based Backfill Material: Parametric Study
title_fullStr Numerical Investigation on the Compressive Behavior of Desert Sand-Based Backfill Material: Parametric Study
title_full_unstemmed Numerical Investigation on the Compressive Behavior of Desert Sand-Based Backfill Material: Parametric Study
title_short Numerical Investigation on the Compressive Behavior of Desert Sand-Based Backfill Material: Parametric Study
title_sort numerical investigation on the compressive behavior of desert sand-based backfill material: parametric study
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10223088/
https://www.ncbi.nlm.nih.gov/pubmed/37241506
http://dx.doi.org/10.3390/ma16103878
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