Deformation and Failure Analyses of the Surrounding Rock Mass with an Interlayer Shear Zone in the Baihetan Underground Powerhouse

In the process of underground cavern excavation, the existence of the interlayer shear zones or large faults often makes the surrounding rock tend to be unstable or even deformed. Under the influence of interlayer shear zone C2, different degrees of deformation and failure occurred in many parts dur...

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Autores principales:	Fei Yuan, An-chi Shi, Jia-wen Zhou, Wang-bing Hong, Meng Wang, Gong-da Lu, Qin Chen, Hai-bo Li
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi Limited 2021
Materias:	Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/bb20f17bebbc4225a2cb6ffb4243681d
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spelling	oai:doaj.org-article:bb20f17bebbc4225a2cb6ffb4243681d2021-11-08T02:36:59ZDeformation and Failure Analyses of the Surrounding Rock Mass with an Interlayer Shear Zone in the Baihetan Underground Powerhouse1687-809410.1155/2021/2988998https://doaj.org/article/bb20f17bebbc4225a2cb6ffb4243681d2021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/2988998https://doaj.org/toc/1687-8094In the process of underground cavern excavation, the existence of the interlayer shear zones or large faults often makes the surrounding rock tend to be unstable or even deformed. Under the influence of interlayer shear zone C2, different degrees of deformation and failure occurred in many parts during the excavation of the Baihetan left bank underground powerhouse. Based on field monitoring and numerical calculation, this paper studies the deformation and failure characteristics of the rock mass with C2 in the whole excavation process and the failure mechanisms are analyzed. The results show that C2 has poor mechanical properties. In the process of excavation, it mainly induces two failure modes: rock collapse and shear deformation, which specifically leads to rock collapses, large deformation and shotcrete cracking in the main powerhouse, and shear deformation in the omnibus bar caves. In addition, the similarities and differences between this study and other studies on the deformation and failure of surrounding rock of underground powerhouse in recent years are discussed, and the relevant treatment measures for C2 are given. The above research results can be a reference for other related studies.Fei YuanAn-chi ShiJia-wen ZhouWang-bing HongMeng WangGong-da LuQin ChenHai-bo LiHindawi LimitedarticleEngineering (General). Civil engineering (General)TA1-2040ENAdvances in Civil Engineering, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Engineering (General). Civil engineering (General) TA1-2040 Fei Yuan An-chi Shi Jia-wen Zhou Wang-bing Hong Meng Wang Gong-da Lu Qin Chen Hai-bo Li Deformation and Failure Analyses of the Surrounding Rock Mass with an Interlayer Shear Zone in the Baihetan Underground Powerhouse
description	In the process of underground cavern excavation, the existence of the interlayer shear zones or large faults often makes the surrounding rock tend to be unstable or even deformed. Under the influence of interlayer shear zone C2, different degrees of deformation and failure occurred in many parts during the excavation of the Baihetan left bank underground powerhouse. Based on field monitoring and numerical calculation, this paper studies the deformation and failure characteristics of the rock mass with C2 in the whole excavation process and the failure mechanisms are analyzed. The results show that C2 has poor mechanical properties. In the process of excavation, it mainly induces two failure modes: rock collapse and shear deformation, which specifically leads to rock collapses, large deformation and shotcrete cracking in the main powerhouse, and shear deformation in the omnibus bar caves. In addition, the similarities and differences between this study and other studies on the deformation and failure of surrounding rock of underground powerhouse in recent years are discussed, and the relevant treatment measures for C2 are given. The above research results can be a reference for other related studies.
format	article
author	Fei Yuan An-chi Shi Jia-wen Zhou Wang-bing Hong Meng Wang Gong-da Lu Qin Chen Hai-bo Li
author_facet	Fei Yuan An-chi Shi Jia-wen Zhou Wang-bing Hong Meng Wang Gong-da Lu Qin Chen Hai-bo Li
author_sort	Fei Yuan
title	Deformation and Failure Analyses of the Surrounding Rock Mass with an Interlayer Shear Zone in the Baihetan Underground Powerhouse
title_short	Deformation and Failure Analyses of the Surrounding Rock Mass with an Interlayer Shear Zone in the Baihetan Underground Powerhouse
title_full	Deformation and Failure Analyses of the Surrounding Rock Mass with an Interlayer Shear Zone in the Baihetan Underground Powerhouse
title_fullStr	Deformation and Failure Analyses of the Surrounding Rock Mass with an Interlayer Shear Zone in the Baihetan Underground Powerhouse
title_full_unstemmed	Deformation and Failure Analyses of the Surrounding Rock Mass with an Interlayer Shear Zone in the Baihetan Underground Powerhouse
title_sort	deformation and failure analyses of the surrounding rock mass with an interlayer shear zone in the baihetan underground powerhouse
publisher	Hindawi Limited
publishDate	2021
url	https://doaj.org/article/bb20f17bebbc4225a2cb6ffb4243681d
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Deformation and Failure Analyses of the Surrounding Rock Mass with an Interlayer Shear Zone in the Baihetan Underground Powerhouse

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