Determination of representative elementary volume (REV) for jointed rock masses exhibiting scale-dependent behavior: a numerical investigation

Abstract Representative elementary volume (REV) is defined as the usual size of a rock mass structure beyond which its mechanical properties are homogenous and isotropic, and its behavior can be modeled using the equivalent continuum approach. Determination of REV is a complex problem in rock engine...

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Autor principal:	Mehmet Sari
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	REV size Scale effect Open-pit mining Numerical modeling Jointed rock mass Hydraulic engineering TC1-978
Acceso en línea:	https://doaj.org/article/5e614b7938c046a6a361e24446ec5aab
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spelling	oai:doaj.org-article:5e614b7938c046a6a361e24446ec5aab2021-12-05T12:19:47ZDetermination of representative elementary volume (REV) for jointed rock masses exhibiting scale-dependent behavior: a numerical investigation10.1186/s40703-021-00164-12092-91962198-2783https://doaj.org/article/5e614b7938c046a6a361e24446ec5aab2021-12-01T00:00:00Zhttps://doi.org/10.1186/s40703-021-00164-1https://doaj.org/toc/2092-9196https://doaj.org/toc/2198-2783Abstract Representative elementary volume (REV) is defined as the usual size of a rock mass structure beyond which its mechanical properties are homogenous and isotropic, and its behavior can be modeled using the equivalent continuum approach. Determination of REV is a complex problem in rock engineering due to its definition ambiguity and application area. This study is one of the first attempts to define a REV for jointed rock masses using the equivalent continuum approach. It is aimed to numerically search a ratio between the characteristic size of an engineering structure and pre-existing joint spacing, which are the two most important contributing elements in assessing REV. For this purpose, four hypothetical engineering cases were investigated using the RS2 (Phase2 v. 9.0) finite element (FE) analysis program. An underground circular opening with a constant diameter, an open-pit mine with varying bench heights, a single bench with a constant height, and an underground powerhouse cavern with a known dimension were executed for possible changes in the safety factor and total displacement measurements under several joint spacing values. Different cut-off REVs were calculated for FE models depending on the type of excavation and measurement method. An average REV size of 19.0, ranging between a minimum of 2 for tunnels and a maximum of 48 for slopes, was found in numerical analysis. The calculated sizes of REV were significantly larger than the range of values (5 to 10) commonly reported in the relevant geotechnical literature.Mehmet SariSpringerOpenarticleREV sizeScale effectOpen-pit miningNumerical modelingJointed rock massHydraulic engineeringTC1-978ENInternational Journal of Geo-Engineering, Vol 12, Iss 1, Pp 1-24 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	REV size Scale effect Open-pit mining Numerical modeling Jointed rock mass Hydraulic engineering TC1-978
spellingShingle	REV size Scale effect Open-pit mining Numerical modeling Jointed rock mass Hydraulic engineering TC1-978 Mehmet Sari Determination of representative elementary volume (REV) for jointed rock masses exhibiting scale-dependent behavior: a numerical investigation
description	Abstract Representative elementary volume (REV) is defined as the usual size of a rock mass structure beyond which its mechanical properties are homogenous and isotropic, and its behavior can be modeled using the equivalent continuum approach. Determination of REV is a complex problem in rock engineering due to its definition ambiguity and application area. This study is one of the first attempts to define a REV for jointed rock masses using the equivalent continuum approach. It is aimed to numerically search a ratio between the characteristic size of an engineering structure and pre-existing joint spacing, which are the two most important contributing elements in assessing REV. For this purpose, four hypothetical engineering cases were investigated using the RS2 (Phase2 v. 9.0) finite element (FE) analysis program. An underground circular opening with a constant diameter, an open-pit mine with varying bench heights, a single bench with a constant height, and an underground powerhouse cavern with a known dimension were executed for possible changes in the safety factor and total displacement measurements under several joint spacing values. Different cut-off REVs were calculated for FE models depending on the type of excavation and measurement method. An average REV size of 19.0, ranging between a minimum of 2 for tunnels and a maximum of 48 for slopes, was found in numerical analysis. The calculated sizes of REV were significantly larger than the range of values (5 to 10) commonly reported in the relevant geotechnical literature.
format	article
author	Mehmet Sari
author_facet	Mehmet Sari
author_sort	Mehmet Sari
title	Determination of representative elementary volume (REV) for jointed rock masses exhibiting scale-dependent behavior: a numerical investigation
title_short	Determination of representative elementary volume (REV) for jointed rock masses exhibiting scale-dependent behavior: a numerical investigation
title_full	Determination of representative elementary volume (REV) for jointed rock masses exhibiting scale-dependent behavior: a numerical investigation
title_fullStr	Determination of representative elementary volume (REV) for jointed rock masses exhibiting scale-dependent behavior: a numerical investigation
title_full_unstemmed	Determination of representative elementary volume (REV) for jointed rock masses exhibiting scale-dependent behavior: a numerical investigation
title_sort	determination of representative elementary volume (rev) for jointed rock masses exhibiting scale-dependent behavior: a numerical investigation
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/5e614b7938c046a6a361e24446ec5aab
work_keys_str_mv	AT mehmetsari determinationofrepresentativeelementaryvolumerevforjointedrockmassesexhibitingscaledependentbehavioranumericalinvestigation
_version_	1718372019150520320

Determination of representative elementary volume (REV) for jointed rock masses exhibiting scale-dependent behavior: a numerical investigation

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