An integrated approach to rock stress measurement in anisotropic non-linear elastic rock

Abstract A mathematical model that allows the simultaneous introduction of non-linear elasticity and transverse isotropy for the interpretation of doorstopper stress measurements is presented, along with the description of a field testing procedure that gives the parameters required in this model. Results from stress measurement simulations performed in the laboratory on a Barre granite block and on rock salt cylinders are presented in order to validate the proposed methodology. A sensitivity analysis of aniseffects of anisotropy and nonlinearity using the simulation results is also performed and shows the influence of both phenomena on calculated stress intensities and orietations.

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