Abstract
High-level radioactive waste repositories are designed to ensure long-term stability, and it is necessary to consider different effects at depth in various aspects. Many uncertainties are involved in characterizing rock mass deformation and failure in the designing process. The interactions between fluid flow, high temperature and stress disturbance must be considered. In this study, multi–stage triaxial compression tests were conducted to investigate the shear characteristics of a saw-cut surface of crystalline rock under different thermal-mechanical conditions. Granitic rock was taken from KURT (KAERI Underground Research Tunnel) for the tests. The artificial shear surface was cut, using diamond saw, at 28( from the direction of loading. The thermal-mechanical testing condition was decided by considering the actual condition at the vicinity of a canister. Three different confining pressures, 5, 10, 15 MPa, were applied during the test at two different temperatures 20( C and 80( C. The shearing behavior of a saw-cut surface was analyzed based on the Mohr-Coulomb failure criterion. From the experimental results, the shear characteristic of the granitic rock was observed to be sensitive to confining pressure but not to temperature. Numerical analysis was conducted using COMSOL to simulate the test, providing a good agreement with the experimental results.
Keywords
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
COMSOL AB, COMSOL Multiphysics version 3.5, User’s guide, p. 604 (2008)
Elliott, G.M., Brown, E.T.: Laboratory measurement of the thermo-hydro-mechanical properties of rock. Quarterly J. Eng. Geology 21, 299–314 (1988)
Kim, T., Lee, C.S., Jeon, S.: A numerical study on shear characteristics of jointed rock under Thermo-mechanical coupled condition. In: International Conference on Analysis of Discontinuous Deformation, Hawaii, USA (2011)
Kovari, K., Tisa, A., Einstein, H.H., Franklin, J.A.: Suggested methods for determining the strength of rock materials in triaxial compression. Int. J. Rock Mech. and Mining Sci. & Geomech. Abstr. 20, 285–290 (1983) (revised version)
Kwon, S.K., Cho, W.J.: A sensitivity analysis of design parameters of an underground radioactive waste repository using a backpropagation neural network. Tunnelling and Underground Space Technology 19(3), 203–212 (2009)
Lockner, D.A., Summers, R., Moore, D., Byerlee, J.D.: Laboratory measurements of reservoir rock from the Geysers geothermal field, California. Int. J. Rock Mech. and Mining Sci. & Geomech. Abstr. 19, 65–80 (1982)
Wanne, T.S., Young, R.P.: Bonded-particle modeling of thermally fractured granite. Int. J. Rock Mech. and Mining Sci. 45(5), 789–799 (2008)
Yoon, J., Jeon, S.: Experimental verification of a pts mode II for rock. Int. J. Rock Mech. and Mining Sci. 41(3), 8–13 (2004)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2013 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Kim, T., Zhang, N., Jeon, S. (2013). A Study on Shear Characteristics of a Smooth Rock Surface under Different Thermal and Mechanical Conditions. In: Hou, M., Xie, H., Were, P. (eds) Clean Energy Systems in the Subsurface: Production, Storage and Conversion. Springer Series in Geomechanics and Geoengineering. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-37849-2_18
Download citation
DOI: https://doi.org/10.1007/978-3-642-37849-2_18
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-37848-5
Online ISBN: 978-3-642-37849-2
eBook Packages: EngineeringEngineering (R0)