Rock is a complex brittle solid consisting of heterogeneous aggregates of polycrystalline minerals which are characteristically anisotropic. An estimation of rock damage induced by cyclic temperature changes is important for planning utilization of underground space for storing energy. A method of predicting the damage induced by temperature variations from the thermal dilation characteristics of intact and fractured mine rocks was formulated and tested in this study. A dilatometer system capable of controlled heating and cooling rates was designed and used for the measurements. Test results of the thermal dilation characteristics of granitic rock types for heating up to and cooling from 400° C at different rates up to 50° C/min indicate that predominant damage takes place during initial exposure of intact rock to temperature cycling. The damage induced in granitic rocks reaches a steady state after three successive thermal cycles.
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1 February 1974
THERMAL EXPANSION OF SOLIDS — 1973: International Symposium
7–9 November 1973
Lake of the Ozarks, Missouri
Research Article|
February 01 1974
Thermal Expansion Behavior of Intact and Thermally Fractured Mine Rocks
K. Thirumalai;
K. Thirumalai
Twin Cities Mining Research Center Bureau of Mines U.S. Department of the Interior Twin Cities, Minnesota 55111
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S. G. Demou
S. G. Demou
Twin Cities Mining Research Center Bureau of Mines U.S. Department of the Interior Twin Cities, Minnesota 55111
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AIP Conf. Proc. 17, 60–71 (1974)
Citation
K. Thirumalai, S. G. Demou; Thermal Expansion Behavior of Intact and Thermally Fractured Mine Rocks. AIP Conf. Proc. 1 February 1974; 17 (1): 60–71. https://doi.org/10.1063/1.2945937
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