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Numerical Simulation on Zonal Disintegration in Deep Surrounding Rock Mass

Zonal disintegration have been discovered in many underground tunnels with the increasing of embedded depth. The formation mechanism of such phenomenon is difficult to explain under the framework of traditional rock mechanics, and the fractured shape and forming conditions are unclear. The numerical...

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Detalles Bibliográficos
Autores principales: Chen, Xuguang, Wang, Yuan, Mei, Yu, Zhang, Xin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi Publishing Corporation 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3925544/
https://www.ncbi.nlm.nih.gov/pubmed/24592166
http://dx.doi.org/10.1155/2014/379326
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author Chen, Xuguang
Wang, Yuan
Mei, Yu
Zhang, Xin
author_facet Chen, Xuguang
Wang, Yuan
Mei, Yu
Zhang, Xin
author_sort Chen, Xuguang
collection PubMed
description Zonal disintegration have been discovered in many underground tunnels with the increasing of embedded depth. The formation mechanism of such phenomenon is difficult to explain under the framework of traditional rock mechanics, and the fractured shape and forming conditions are unclear. The numerical simulation was carried out to research the generating condition and forming process of zonal disintegration. Via comparing the results with the geomechanical model test, the zonal disintegration phenomenon was confirmed and its mechanism is revealed. It is found to be the result of circular fracture which develops within surrounding rock mass under the high geostress. The fractured shape of zonal disintegration was determined, and the radii of the fractured zones were found to fulfill the relationship of geometric progression. The numerical results were in accordance with the model test findings. The mechanism of the zonal disintegration was revealed by theoretical analysis based on fracture mechanics. The fractured zones are reportedly circular and concentric to the cavern. Each fracture zone ruptured at the elastic-plastic boundary of the surrounding rocks and then coalesced into the circular form. The geometric progression ratio was found to be related to the mechanical parameters and the ground stress of the surrounding rocks.
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spelling pubmed-39255442014-03-03 Numerical Simulation on Zonal Disintegration in Deep Surrounding Rock Mass Chen, Xuguang Wang, Yuan Mei, Yu Zhang, Xin ScientificWorldJournal Research Article Zonal disintegration have been discovered in many underground tunnels with the increasing of embedded depth. The formation mechanism of such phenomenon is difficult to explain under the framework of traditional rock mechanics, and the fractured shape and forming conditions are unclear. The numerical simulation was carried out to research the generating condition and forming process of zonal disintegration. Via comparing the results with the geomechanical model test, the zonal disintegration phenomenon was confirmed and its mechanism is revealed. It is found to be the result of circular fracture which develops within surrounding rock mass under the high geostress. The fractured shape of zonal disintegration was determined, and the radii of the fractured zones were found to fulfill the relationship of geometric progression. The numerical results were in accordance with the model test findings. The mechanism of the zonal disintegration was revealed by theoretical analysis based on fracture mechanics. The fractured zones are reportedly circular and concentric to the cavern. Each fracture zone ruptured at the elastic-plastic boundary of the surrounding rocks and then coalesced into the circular form. The geometric progression ratio was found to be related to the mechanical parameters and the ground stress of the surrounding rocks. Hindawi Publishing Corporation 2014-01-30 /pmc/articles/PMC3925544/ /pubmed/24592166 http://dx.doi.org/10.1155/2014/379326 Text en Copyright © 2014 Xuguang Chen et al. https://creativecommons.org/licenses/by/3.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Chen, Xuguang
Wang, Yuan
Mei, Yu
Zhang, Xin
Numerical Simulation on Zonal Disintegration in Deep Surrounding Rock Mass
title Numerical Simulation on Zonal Disintegration in Deep Surrounding Rock Mass
title_full Numerical Simulation on Zonal Disintegration in Deep Surrounding Rock Mass
title_fullStr Numerical Simulation on Zonal Disintegration in Deep Surrounding Rock Mass
title_full_unstemmed Numerical Simulation on Zonal Disintegration in Deep Surrounding Rock Mass
title_short Numerical Simulation on Zonal Disintegration in Deep Surrounding Rock Mass
title_sort numerical simulation on zonal disintegration in deep surrounding rock mass
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3925544/
https://www.ncbi.nlm.nih.gov/pubmed/24592166
http://dx.doi.org/10.1155/2014/379326
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