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Applicability of Yielding–Resisting Sand Column and Three-Dimensional Coordination Support in Stopes
In view of the existing problems of stope roadways, which are difficult to maintain under the influence of high ground and mining-induced stresses, the structural characteristics and movement regularities of stopes surrounding rocks were analysed. Through the construction of a three-dimensional mech...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6720179/ https://www.ncbi.nlm.nih.gov/pubmed/31430932 http://dx.doi.org/10.3390/ma12162635 |
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author | Meng, Fanbao Wen, Zhijie Shen, Baotang Jiang, Yujing Shi, Shaoshuai Zhao, Renle |
author_facet | Meng, Fanbao Wen, Zhijie Shen, Baotang Jiang, Yujing Shi, Shaoshuai Zhao, Renle |
author_sort | Meng, Fanbao |
collection | PubMed |
description | In view of the existing problems of stope roadways, which are difficult to maintain under the influence of high ground and mining-induced stresses, the structural characteristics and movement regularities of stopes surrounding rocks were analysed. Through the construction of a three-dimensional mechanical model of the coordination support of a stope, the adaptability index of the support in stope is presented, and its mechanism of operation is expounded. Yielding–resisting sand column (YRSC) sidewall-support technology with satisfactory compressibility and supporting strength was developed. The structure and actual mechanical properties of the YRSC were investigated through laboratory experiments, and the optimum ratio of filling materials was obtained. The good applicability of the load and deformation adaptability index of the three-dimensional coordination support in the stope and YRSC sidewall-support technology were demonstrated in practice at the No. 12306 working face of the Dongda coal mine. It was shown that the designed carrying capacity and compression of the sand columns satisfied the site requirements. The actual stress and deformation of the YRSC exhibited three stages: Slow growth at the initial stage, a large increase in the medium term, and a stable trend at the end. The adaptability index of the three-dimensional coordination support in the stope considers all bearing structure units of the stope as an interconnected whole, and the stability conditions of the stope roadway can be quantitatively described. The supporting effect of the YRSC is remarkable and can be applied to the construction of tunnels, bridge systems and other engineering fields. |
format | Online Article Text |
id | pubmed-6720179 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-67201792019-10-30 Applicability of Yielding–Resisting Sand Column and Three-Dimensional Coordination Support in Stopes Meng, Fanbao Wen, Zhijie Shen, Baotang Jiang, Yujing Shi, Shaoshuai Zhao, Renle Materials (Basel) Article In view of the existing problems of stope roadways, which are difficult to maintain under the influence of high ground and mining-induced stresses, the structural characteristics and movement regularities of stopes surrounding rocks were analysed. Through the construction of a three-dimensional mechanical model of the coordination support of a stope, the adaptability index of the support in stope is presented, and its mechanism of operation is expounded. Yielding–resisting sand column (YRSC) sidewall-support technology with satisfactory compressibility and supporting strength was developed. The structure and actual mechanical properties of the YRSC were investigated through laboratory experiments, and the optimum ratio of filling materials was obtained. The good applicability of the load and deformation adaptability index of the three-dimensional coordination support in the stope and YRSC sidewall-support technology were demonstrated in practice at the No. 12306 working face of the Dongda coal mine. It was shown that the designed carrying capacity and compression of the sand columns satisfied the site requirements. The actual stress and deformation of the YRSC exhibited three stages: Slow growth at the initial stage, a large increase in the medium term, and a stable trend at the end. The adaptability index of the three-dimensional coordination support in the stope considers all bearing structure units of the stope as an interconnected whole, and the stability conditions of the stope roadway can be quantitatively described. The supporting effect of the YRSC is remarkable and can be applied to the construction of tunnels, bridge systems and other engineering fields. MDPI 2019-08-19 /pmc/articles/PMC6720179/ /pubmed/31430932 http://dx.doi.org/10.3390/ma12162635 Text en © 2019 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Meng, Fanbao Wen, Zhijie Shen, Baotang Jiang, Yujing Shi, Shaoshuai Zhao, Renle Applicability of Yielding–Resisting Sand Column and Three-Dimensional Coordination Support in Stopes |
title | Applicability of Yielding–Resisting Sand Column and Three-Dimensional Coordination Support in Stopes |
title_full | Applicability of Yielding–Resisting Sand Column and Three-Dimensional Coordination Support in Stopes |
title_fullStr | Applicability of Yielding–Resisting Sand Column and Three-Dimensional Coordination Support in Stopes |
title_full_unstemmed | Applicability of Yielding–Resisting Sand Column and Three-Dimensional Coordination Support in Stopes |
title_short | Applicability of Yielding–Resisting Sand Column and Three-Dimensional Coordination Support in Stopes |
title_sort | applicability of yielding–resisting sand column and three-dimensional coordination support in stopes |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6720179/ https://www.ncbi.nlm.nih.gov/pubmed/31430932 http://dx.doi.org/10.3390/ma12162635 |
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