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Non-uniform failure and differential pressure relief technology of roadway under irregular goafs in deep close-distance coal seams
In response to the control problems of large-deformation roadways in close-distance coal seams, taking a typical roadway under irregular goafs and residual coal pillar in deep close-distance coal seams as the background, the characteristics of mine pressure and key difficulties in surrounding rock c...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10613204/ https://www.ncbi.nlm.nih.gov/pubmed/37898730 http://dx.doi.org/10.1038/s41598-023-45857-y |
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author | Yin, Shuaifeng Zheng, Xinjian Wang, En Kang, Qingtao Zhang, Xiaoming |
author_facet | Yin, Shuaifeng Zheng, Xinjian Wang, En Kang, Qingtao Zhang, Xiaoming |
author_sort | Yin, Shuaifeng |
collection | PubMed |
description | In response to the control problems of large-deformation roadways in close-distance coal seams, taking a typical roadway under irregular goafs and residual coal pillar in deep close-distance coal seams as the background, the characteristics of mine pressure and key difficulties in surrounding rock control of roadway are explored and an improvement strategy for controlling surrounding rock is proposed. The stress expression in roadway floor under the influence of residual coal pillar is derived by theoretical calculation. The peak lines of deviatoric stress and vertical stress in roadway after the mining of the upper coal seam are obtained by numerical simulation. The roadway is divided into two key zones: ordinary zone and disturbance zone by residual coal pillar, and the disturbance range of roadway below residual coal pillar is determined to be 44.60 m. It reveals the differential, asymmetric, and non-uniform distortion and failure laws of roadway at different positions under irregular goafs and residual coal pillar. The differential control technology named asymmetric support in ordinary zone of roadway and combined support and drilling pressure relief in disturbance zone below residual coal pillar is proposed. The feasibility of differential pressure relief and control technology has been verified through on-site engineering test, which ensures the safety and stability of roadway and provides technical references for surrounding rock control in similar deep and complex roadways. |
format | Online Article Text |
id | pubmed-10613204 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-106132042023-10-30 Non-uniform failure and differential pressure relief technology of roadway under irregular goafs in deep close-distance coal seams Yin, Shuaifeng Zheng, Xinjian Wang, En Kang, Qingtao Zhang, Xiaoming Sci Rep Article In response to the control problems of large-deformation roadways in close-distance coal seams, taking a typical roadway under irregular goafs and residual coal pillar in deep close-distance coal seams as the background, the characteristics of mine pressure and key difficulties in surrounding rock control of roadway are explored and an improvement strategy for controlling surrounding rock is proposed. The stress expression in roadway floor under the influence of residual coal pillar is derived by theoretical calculation. The peak lines of deviatoric stress and vertical stress in roadway after the mining of the upper coal seam are obtained by numerical simulation. The roadway is divided into two key zones: ordinary zone and disturbance zone by residual coal pillar, and the disturbance range of roadway below residual coal pillar is determined to be 44.60 m. It reveals the differential, asymmetric, and non-uniform distortion and failure laws of roadway at different positions under irregular goafs and residual coal pillar. The differential control technology named asymmetric support in ordinary zone of roadway and combined support and drilling pressure relief in disturbance zone below residual coal pillar is proposed. The feasibility of differential pressure relief and control technology has been verified through on-site engineering test, which ensures the safety and stability of roadway and provides technical references for surrounding rock control in similar deep and complex roadways. Nature Publishing Group UK 2023-10-28 /pmc/articles/PMC10613204/ /pubmed/37898730 http://dx.doi.org/10.1038/s41598-023-45857-y Text en © The Author(s) 2023 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 Yin, Shuaifeng Zheng, Xinjian Wang, En Kang, Qingtao Zhang, Xiaoming Non-uniform failure and differential pressure relief technology of roadway under irregular goafs in deep close-distance coal seams |
title | Non-uniform failure and differential pressure relief technology of roadway under irregular goafs in deep close-distance coal seams |
title_full | Non-uniform failure and differential pressure relief technology of roadway under irregular goafs in deep close-distance coal seams |
title_fullStr | Non-uniform failure and differential pressure relief technology of roadway under irregular goafs in deep close-distance coal seams |
title_full_unstemmed | Non-uniform failure and differential pressure relief technology of roadway under irregular goafs in deep close-distance coal seams |
title_short | Non-uniform failure and differential pressure relief technology of roadway under irregular goafs in deep close-distance coal seams |
title_sort | non-uniform failure and differential pressure relief technology of roadway under irregular goafs in deep close-distance coal seams |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10613204/ https://www.ncbi.nlm.nih.gov/pubmed/37898730 http://dx.doi.org/10.1038/s41598-023-45857-y |
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