Modeling of rock failure based on physical cellular automata

摘要

To analyze the effects of heterogeneous material characteristics on rock failure, a micro-heterogeneous physical cellular automata (Mh-PCA) model is introduced according to the cellular automata theory from a general power view. In this model, the neighbor is the Moore pattern and the Weibull distribution is adopted to simulate the rock heterogeneousness. Using this model, the evolvements and acoustic emission of rock failure are simulated for four materials of different degree of homogeneousness (m=l,5,10,15). The results show that the heterogeneous characteristic has a great effect on the rock failure, the more the homogeneousness, the fewer the crack branches and the more concentrated acoustic emissions. The physical cellular automata theory gives a new idea for studying rock failure.