The effect of sampling volume size on the apparent stiffness of jointed rock mass

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F22%3A00359308" target="_blank" >RIV/68407700:21110/22:00359308 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.14311/APP.2022.34.0038" target="_blank" >https://doi.org/10.14311/APP.2022.34.0038</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14311/APP.2022.34.0038" target="_blank" >10.14311/APP.2022.34.0038</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The effect of sampling volume size on the apparent stiffness of jointed rock mass

Popis výsledku v původním jazyce

Overall mechanical properties of a jointed rock mass are strongly affected by discontinuities– fractures – that naturally occur in rocks. Stochastically-generated discrete fracture network (DFN)modeling, which uses a probabilistic approach to describe the spatial distribution of fractures, suchas position, size, or orientation, offers an explicit way to describe geometry of the fracture system.Many in-situ measurements and analyses presented in literature indicate that fractures’ sizes can beadequately represented by the power law probability distribution. The parallel plate model of individualfractures combined with an averaging technique makes it possible to estimate the overall compliance orstiffness of jointed rock mass (Oda et al. [1]). In the present study, a series of numerical simulationsof jointed rock mass modeled by DFN and Oda’s approach were conducted to analyze the effect ofdifferent sizes of the sampling volume on the overall elastic moduli. The results of the numerical studyshow that the variance as well as the average of the apparent stiffness decrease as the size of samplingelement grows.

Název v anglickém jazyce

The effect of sampling volume size on the apparent stiffness of jointed rock mass

Popis výsledku anglicky

Overall mechanical properties of a jointed rock mass are strongly affected by discontinuities– fractures – that naturally occur in rocks. Stochastically-generated discrete fracture network (DFN)modeling, which uses a probabilistic approach to describe the spatial distribution of fractures, suchas position, size, or orientation, offers an explicit way to describe geometry of the fracture system.Many in-situ measurements and analyses presented in literature indicate that fractures’ sizes can beadequately represented by the power law probability distribution. The parallel plate model of individualfractures combined with an averaging technique makes it possible to estimate the overall compliance orstiffness of jointed rock mass (Oda et al. [1]). In the present study, a series of numerical simulationsof jointed rock mass modeled by DFN and Oda’s approach were conducted to analyze the effect ofdifferent sizes of the sampling volume on the overall elastic moduli. The results of the numerical studyshow that the variance as well as the average of the apparent stiffness decrease as the size of samplingelement grows.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

NMM 2021 Nano & Macro Mechanics

ISBN

978-80-01-06976-9

ISSN

—

e-ISSN

2336-5382

Počet stran výsledku

5

Strana od-do

38-42

Název nakladatele

České vysoké učení technické v Praze

Místo vydání

Praha

Místo konání akce

Praha

Datum konání akce

16. 9. 2021

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—