Abstract
Thermal stresses will be induced where the walls of a storage cavity are at a different temperature from the surrounding rocks, a situation which may arise in the disposal of high temperature wastes or in the cylical operation of a high pressure gas storage facility. The effect of these stresses is examined for an idealized spherical cavity in infinite, homogeneous and isotropic elastic and linear viscoelastic materials. It is shown that under certain conditions thermal stresses can change a condition of apparent stability to one of possible instability. The stability of a high pressure gas storage cavity in rock salt is examined as an example of thermal stress effects.
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