Abstract
The present paper describes applications of the boundary element method to in-situ stress measurements and analysis of an underground cavern. In the first half, as a technique for measuring in-situ initial state of stresses we described the principle, analysis and implementation of the conical-ended borehole straingauge method in conjunction with stress-relief technique by overcoring, in which the boundary element analysis played a basic role. Applying the method we evaluated the in-situ initial state of stresses. In the second half, by use of the boundary element method we analyzed the state of deformation of an underground cavern for a power-house excavated in rock subject to the measured in-situ state of stresses.
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