Regularities of failure of migmatized gneiss with metamorphic foliation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F18%3A00102859" target="_blank" >RIV/00216224:14310/18:00102859 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Regularities of failure of migmatized gneiss with metamorphic foliation

Original language description

The research is focused on an exploration of the mechanical anisotropy and fracture process of a rock with planes of weakness. In this study, the strength behavior of migmatized gneiss with weakened planes, i.e. metamorphic foliation is evaluated. Metamorphic foliation with a specific orientation of rock grains may results that the mechanical behavior, and the mechanical properties, i.e. strength, are changed in different directions of loading. The strength anisotropy and the direction of weakening are in geomechanics not sufficiently clear until now. For these purposes, series of uniaxial compressive strength tests were carried out on the five groups of specimens of migmatized gneiss based on the different angle between foliation and loading. The measured results have shown that mechanical properties of the migmatized gneiss have different values concerning foliation. U-shaped anisotropy was obtained, in accordance to Ramamurthy distinguished curve of anisotropy (Ramamurthy, 1993) with the minimum average strength at anisotropy angle of 30 degree and the maximum average strength is reached when anisotropy angle is 90 degree. Next, an intensity of deformation, an orientation of new-created fractures due to foliation and a shape of fractured specimens were characterized. An extension failure parallel or subparallel to the loading and a shear failure were also recognized on the fractured rock specimens. The characterization should be a contribution to understanding of that, how an orientation of weakness planes influences the strength and the fracture formation of the rock. The knowledge of the problem is useful information for stability ensuring of underground construction, mine workings and for other geotechnical application.

Czech name

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Czech description

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Type

J_ost - Miscellaneous article in a specialist periodical

CEP classification

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OECD FORD branch

10505 - Geology

Project

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Continuities

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

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

Name of the periodical

Geology, Geophysics & Enviroment

ISSN

2299-8004

e-ISSN

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Volume of the periodical

44

Issue of the periodical within the volume

1

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

2

Pages from-to

150-151

UT code for WoS article

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EID of the result in the Scopus database

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