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Research on blasting cumulative dynamic damage of surrounding rock in step construction tunnel
In the process of cyclic blasting during tunnel excavation, the reserved surrounding rock sustains irreparable damage accumulation. For safe tunnel construction, it is imperative to understand the characteristics of blasting dynamic cumulative rock damage. Sonic wave test and numerical simulation me...
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/PMC9898305/ https://www.ncbi.nlm.nih.gov/pubmed/36737454 http://dx.doi.org/10.1038/s41598-023-28900-w |
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author | Cui, Yaozhong Wu, Bo Meng, Guowang Xu, Shixiang |
author_facet | Cui, Yaozhong Wu, Bo Meng, Guowang Xu, Shixiang |
author_sort | Cui, Yaozhong |
collection | PubMed |
description | In the process of cyclic blasting during tunnel excavation, the reserved surrounding rock sustains irreparable damage accumulation. For safe tunnel construction, it is imperative to understand the characteristics of blasting dynamic cumulative rock damage. Sonic wave test and numerical simulation methods were applied to the research. The JH-2 model was adopted as the damage model of surrounding rock. Based on the data transfer method between solvers in ABAQUS software, the cumulative damage was calculated. The damage characteristics were obtained by combining the sonic wave test results. According to the research findings, the entire reserved surrounding rock has periodic damage characteristics. Each periodic damage area has a funnel shape along the tunnel’s longitudinal direction, with a length of 160 cm, and 1.07 times the excavation footage. The latter excavation footage's blasting effect on the damaged area of the previous footage rock is 40 cm long, with three cumulative damage patterns. The three cumulative damage patterns more clearly reveal the surrounding rock's additional damage law, the degree of additional damage is greatest with the distance of 5–20 cm from the latter excavation footage. The research can provide appropriate theoretical guidance for the design of the step-blasting construction tunnel's blasting scheme and lining. |
format | Online Article Text |
id | pubmed-9898305 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-98983052023-02-05 Research on blasting cumulative dynamic damage of surrounding rock in step construction tunnel Cui, Yaozhong Wu, Bo Meng, Guowang Xu, Shixiang Sci Rep Article In the process of cyclic blasting during tunnel excavation, the reserved surrounding rock sustains irreparable damage accumulation. For safe tunnel construction, it is imperative to understand the characteristics of blasting dynamic cumulative rock damage. Sonic wave test and numerical simulation methods were applied to the research. The JH-2 model was adopted as the damage model of surrounding rock. Based on the data transfer method between solvers in ABAQUS software, the cumulative damage was calculated. The damage characteristics were obtained by combining the sonic wave test results. According to the research findings, the entire reserved surrounding rock has periodic damage characteristics. Each periodic damage area has a funnel shape along the tunnel’s longitudinal direction, with a length of 160 cm, and 1.07 times the excavation footage. The latter excavation footage's blasting effect on the damaged area of the previous footage rock is 40 cm long, with three cumulative damage patterns. The three cumulative damage patterns more clearly reveal the surrounding rock's additional damage law, the degree of additional damage is greatest with the distance of 5–20 cm from the latter excavation footage. The research can provide appropriate theoretical guidance for the design of the step-blasting construction tunnel's blasting scheme and lining. Nature Publishing Group UK 2023-02-03 /pmc/articles/PMC9898305/ /pubmed/36737454 http://dx.doi.org/10.1038/s41598-023-28900-w 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 Cui, Yaozhong Wu, Bo Meng, Guowang Xu, Shixiang Research on blasting cumulative dynamic damage of surrounding rock in step construction tunnel |
title | Research on blasting cumulative dynamic damage of surrounding rock in step construction tunnel |
title_full | Research on blasting cumulative dynamic damage of surrounding rock in step construction tunnel |
title_fullStr | Research on blasting cumulative dynamic damage of surrounding rock in step construction tunnel |
title_full_unstemmed | Research on blasting cumulative dynamic damage of surrounding rock in step construction tunnel |
title_short | Research on blasting cumulative dynamic damage of surrounding rock in step construction tunnel |
title_sort | research on blasting cumulative dynamic damage of surrounding rock in step construction tunnel |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9898305/ https://www.ncbi.nlm.nih.gov/pubmed/36737454 http://dx.doi.org/10.1038/s41598-023-28900-w |
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