Numerical Model of Limit State Prediction in Rocks Using Stavrogin’s Strength
A. G. PROTOSENYA, M. A. KARASEV, N. A. BELYAKOV
National Mineral Resources University–University of Mines, 21–aya liniya V.O. 2, Saint–Petersburg, 199026 Russia
Keywords: rocks, stresses, strength condition, envelope, model, nonlinearity, excavation
Abstract
The study covers the issues of strength of rocks under three–dimensional stress, elastoplastic model with variable parameters of plastic flow, algorithm of problem solving with Stavrogin’s strength, evaluation of the numerical model correctness and the scope of use of the Coulomb criterion. The problem implementation uses Abaqus software. The calculated data on limit state zones around an underground excavation are compared with the strength conditions by Stavrogin and Coulomb.
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