Identification of damage parameters for jointed rock

An algorithm for parameter identification based on the finite element method is proposed in this paper. It follows the main idea of the dual boundary control method, but introduces some modifications to improve its stability. This improvement is illustrated with a simple example. The algorithm is subsequently extended to identify the parameters in a three-dimensional anisotropic elastic damage model. This algorithmʹs abilities to identify various parameters are evaluated by simulating a tunnel excavation process. The numerical results reveal that this is a stable and fast-converging algorithm when the physical character of the problem is intrinsically valid.