Abstract
The aim of this paper was to compare the stress and strain quantities that are related to the failure–deformation process of hard rock. The data used here was obtained from laboratory uniaxial compression tests performed on different types of Fennoscandian hard rocks. The failure–deformation process quantities were compared at each deformation stage and for each single specimen. Moreover, geological information such as the rock origin process and the rock characteristics of the specimens were studied and linked to the stress and strain quantities. The purpose was to investigate the influence of the rock origin process and rock characteristics on these quantities. The main results of this study showed that the normalized crack damage lateral strain (ε 3cd/ε 3p ) and the volumetric strain (ε crv−ci and ε v−cd) quantities were strongly affected by the grain size. The normalized and volumetric quantities are weakly dependent on the mineral composition.
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Acknowledgments
K. P. Hidalgo would like to express her gratitude to the Rock Engineering Research Foundation (BeFo), Trafikverket (The Swedish Transport Administration), and the Swedish Nuclear Fuel and Waste Management Co. (SKB) for financial support for this research project. The authors also acknowledge the support through the Centre of Advanced Mining and Metallurgy (CAMM) at Luleå University of Technology (LTU). K. P. Hidalgo also wishes to thank her assistant supervisor, Adjunct Professor Jonny Sjöberg at Itasca Consultants AB, Sweden, for his suggestions and comments. The authors also thank Mikael Nilsson for checking the English.
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Pérez Hidalgo, K., Nordlund, E. Comparison Between Stress and Strain Quantities of the Failure–Deformation Process of Fennoscandian Hard Rocks Using Geological Information. Rock Mech Rock Eng 46, 41–51 (2013). https://doi.org/10.1007/s00603-012-0242-1
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DOI: https://doi.org/10.1007/s00603-012-0242-1