MECHANICAL PROPERTIES OF GRANULITE FROM HORNÍ BORY IN BOHEMIAN MASSIF

GeoScience Engineering

Lukáš KRMÍČEK¹  Dagmar HAVLÍČKOVÁ²  Manfred BLÜMEL²  Martin ZÁVACKݲ  IvaROZSYPALOVÁ³ 

[1] Institute of Geology of the Czech Academy of Sciences, Prague, CzechRepublic;Brno University of Technology, Faculty of Civil Engineering, Institute of Geotechnics, Brno, Czech Republic;Graz University of Technology, Institute for Rock Mechanics and Tunnelling, Graz, Austria;

关键词: granulite;    mineral properties;    foliation;    uniaxial compressive strength;    triaxial compressive strength;    anisotropic properties;   

DOI  :  10.35180/gse-2019-0022

来源: DOAJ

【 摘 要 】

Granulite represents one of the favourite rock types for the construction of an underground nuclear waste repository in the Czech Republic. Granulite from the Bohemian Massif (locality Horní Bory) was investigated in this study, with a special focus on the evaluation of the rock anisotropy. Investigated rock represents typical fine-grained foliated felsic granulite with principal mineral association: quartz + feldspar (K-feldspar > plagioclase) + garnet + biotite + kyanite and/or sillimanite. Anisotropy was identified in the rock fabric both at macroscopic and microscopic scale. During the laboratory testing, granulite reached considerable high uniaxial compressive strength (UCS) - up to 240 MPa; and brittle type (Class II) of failure occurred. We found that variability of the UCS and Young's modulus were relatively low. On the other hand, variability of the Poisson's ratio and the constants in Hoek-Brown failure criterion in triaxial loading were significantly high.

【 授权许可】

Unknown