3D displacement discontinuity analysis of in-situ stress perturbation near a weak faul

A numerical investigation utilizing the 3D displacement discontinuity method is performed to examine the stress perturbations and induced displacements near a weak fault with arbitrary orientations and dip, assuming zero shear stress and normal displacement. The in-situ stress ﬁeld near the fault is...

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Autores principales:	Yutong Chai, Shunde Yin
Formato:	article
Lenguaje:	EN
Publicado:	Yandy Scientific Press 2021
Materias:	displacement discontinuity in-situ stress weak fault numerical analysis Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/cdb6108159bd4339a0383bc7244c4f36
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spelling	oai:doaj.org-article:cdb6108159bd4339a0383bc7244c4f362021-11-08T07:07:57Z3D displacement discontinuity analysis of in-situ stress perturbation near a weak faul10.46690/ager.2021.03.052208-598Xhttps://doaj.org/article/cdb6108159bd4339a0383bc7244c4f362021-09-01T00:00:00Zhttps://www.yandy-ager.com/index.php/ager/article/view/342https://doaj.org/toc/2208-598XA numerical investigation utilizing the 3D displacement discontinuity method is performed to examine the stress perturbations and induced displacements near a weak fault with arbitrary orientations and dip, assuming zero shear stress and normal displacement. The in-situ stress ﬁeld near the fault is taken as known and varied with depth. The modelling is constructed based on indirect boundary integral equations. In this work, the fault plane is ﬁrst modelled as a rectangular plane with negligible thickness between the adjacent surfaces. The fault plane is then divided into numerous rectangular boundary elements with imposed shear singularities on the surface, which is normal to the fault plane to simulate a traction-free scenario. The numerical results of the total induced stresses and displacements are then compared to the existing solutions of a penny-shaped crack for validation purpose. With validated results, the paper moves on to the discussion of various factors that have impacts on the induced stress and displacements, including: aspect ratio which is deﬁned by strike over dip; orientation of the strike on the horizontal ground surface; as well as dip. The boundary integration method with modiﬁcation is also used to model an elliptical distribution of singularities with inner, corner, and edge elements to accommodate more complex shape of a discontinuity; small differences are observed.Yutong ChaiShunde YinYandy Scientific Pressarticledisplacement discontinuityin-situ stressweak faultnumerical analysisEngineering geology. Rock mechanics. Soil mechanics. Underground constructionTA703-712GeologyQE1-996.5ENAdvances in Geo-Energy Research, Vol 5, Iss 3, Pp 286-296 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	displacement discontinuity in-situ stress weak fault numerical analysis Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 Geology QE1-996.5
spellingShingle	displacement discontinuity in-situ stress weak fault numerical analysis Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 Geology QE1-996.5 Yutong Chai Shunde Yin 3D displacement discontinuity analysis of in-situ stress perturbation near a weak faul
description	A numerical investigation utilizing the 3D displacement discontinuity method is performed to examine the stress perturbations and induced displacements near a weak fault with arbitrary orientations and dip, assuming zero shear stress and normal displacement. The in-situ stress ﬁeld near the fault is taken as known and varied with depth. The modelling is constructed based on indirect boundary integral equations. In this work, the fault plane is ﬁrst modelled as a rectangular plane with negligible thickness between the adjacent surfaces. The fault plane is then divided into numerous rectangular boundary elements with imposed shear singularities on the surface, which is normal to the fault plane to simulate a traction-free scenario. The numerical results of the total induced stresses and displacements are then compared to the existing solutions of a penny-shaped crack for validation purpose. With validated results, the paper moves on to the discussion of various factors that have impacts on the induced stress and displacements, including: aspect ratio which is deﬁned by strike over dip; orientation of the strike on the horizontal ground surface; as well as dip. The boundary integration method with modiﬁcation is also used to model an elliptical distribution of singularities with inner, corner, and edge elements to accommodate more complex shape of a discontinuity; small differences are observed.
format	article
author	Yutong Chai Shunde Yin
author_facet	Yutong Chai Shunde Yin
author_sort	Yutong Chai
title	3D displacement discontinuity analysis of in-situ stress perturbation near a weak faul
title_short	3D displacement discontinuity analysis of in-situ stress perturbation near a weak faul
title_full	3D displacement discontinuity analysis of in-situ stress perturbation near a weak faul
title_fullStr	3D displacement discontinuity analysis of in-situ stress perturbation near a weak faul
title_full_unstemmed	3D displacement discontinuity analysis of in-situ stress perturbation near a weak faul
title_sort	3d displacement discontinuity analysis of in-situ stress perturbation near a weak faul
publisher	Yandy Scientific Press
publishDate	2021
url	https://doaj.org/article/cdb6108159bd4339a0383bc7244c4f36
work_keys_str_mv	AT yutongchai 3ddisplacementdiscontinuityanalysisofinsitustressperturbationnearaweakfaul AT shundeyin 3ddisplacementdiscontinuityanalysisofinsitustressperturbationnearaweakfaul
_version_	1718442947881467904

3D displacement discontinuity analysis of in-situ stress perturbation near a weak faul

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