ABSTRACT
Three-dimensional numerical simulation of the Kaiser effect in rock samples was carried out using a theoretical model based on the mechanics of wing cracks. Two cycles of axisymmetric triaxial loading were simulated: I-in situ, II-in laboratory. The laboratory loading could be conducted with various values of ratio between axial and confining stress. Dependence of the Kaiser effect on the stress ratio was carefully studied. Based on the simulation results, a new method is proposed for determining values of both in situ principal stresses.
