Based on the theory of cellular automata, the evolving cellular automata(ECA) model is proposed in the paper. In the ECA system, the triangular cell and the node cell are taken as the neighborhoods with respect to each other and evolve according to the local interaction rules. And the strain-stress relations of the brittle rock are considered to be consistent with the perfect elastic constitutive law in mesocosmic view. The tensile failure and shear fracture are taken into account by the triangular cell’s evolvement based on the modified Mohr-Coulomb criteria. The heterogeneity of the brittle rock, the brittle rock failure mechanism and the end effect of the brittle rock failure are discussed by the numerical simulation. Some numerical experiments about the brittle rock under uniaxial compression tests are carried out using ECA numerical method. And some primary conclusions have been drawn out.
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