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Deformation Mechanism of Basic Rock During Long-Term Compression: Area of Hlw Repository Design, Chelyabinsk District, Russia

Published online by Cambridge University Press:  15 February 2011

V. A. Petrov ,
L. I. Zviagintsev  and
V. V. Poluektov
V. A. Petrov
Affiliation:
Institute of Geology of Ore Deposits (IGEM), Russian Academy of Sciences, Staromonetny, 35, 109017 Moscow, Russia, vlad@igemmsk.su
L. I. Zviagintsev
Affiliation:
Institute of Geology of Ore Deposits (IGEM), Russian Academy of Sciences, Staromonetny, 35, 109017 Moscow, Russia, vlad@igemmsk.su
V. V. Poluektov
Affiliation:
Institute of Geology of Ore Deposits (IGEM), Russian Academy of Sciences, Staromonetny, 35, 109017 Moscow, Russia, vlad@igemmsk.su
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Abstract

A combination of ultrasound, mechanical and petrographic results for long-term experimental compression of greenschist facies porphyritic andesite tuffs indicate a deformation mechanism that depends upon the mineral composition, textural-structural features of the rocks and the orientation of compression relative to the rock textures. Three dry samples of rock were investigated. Coaxial compression of a massive sample for 816 hours and a foliated sample for 1176 hours (pressure orthogonal to foliation) is characterized by solidification when the rocks are temporarily metastable. Compressive strength of the first sample is 850 kg/cm2 and of the second one, 800 kg/cm2. Experimentally, the rock behavior changes from a plastic to a brittle regime of deformation. In contrast, compression of the foliated sample parallel to foliation causes disintegration along the foliation within 480 hours without solidification. The rock is liable to brittle deformation and its compressive strength is 500 kg/cm2. These results may have implications for characterization of near-field processes in connection with numerous subhorizontal zones of schistosity within the strata that are targeted for underground disposal of high-level wastes (HLW) in the Mayak radiochemical complex area.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 412: Symposium V – Scientific Basis for Nuclear Waste Management XIX , 1995 , 777
Copyright
Copyright © Materials Research Society 1996

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References

1. Velichkin, V.I., Petrov, V.A., Tarasov, N.N., Poluektov, V.V., Kochkin, B.T., Asadulin, A.A. and Volkov, A.B. in Radioactive Waste Management and Environmental Remediation, edited by Slate, S., Feizollahi, F., and Creer, J. (The American Society of Mechanical Engineers, New York, 1995), pp. 823–826.Google Scholar
2. Zviagintsev, L.I., Petrophysics of the Ore-Bearing Intrusives, (Nauka Publishing, Moscow, 1993), p. 109 (in Russian).Google Scholar