Research on Deformation Failure Characteristic and Simulation Method of Rock under Triaxial Compression
Rock deformation failure law and its simulation method are the basis of rock engineering stability analysis.According to the test curve of coarse marble,the staged deformation characteristics and the change law of charac-teristic stress of rock are obtained.Based on Mohr-Cou-lomb criterion and Drucker-Prager criterion,the statistical damage constitutive model is established,and the model curve is compared with the test curve.The results show that the characteristic stress of coarse marble is linearly and positively correlated with confining pressure,and the post-peak deformation characteristics are significantly af-fected by confining pressure.The model proposed in this paper can reflect the staged deformation law of rock.For the simulation effect of post-peak deformation charac-teristics,Mohr-Coulomb criterion is better than Druck-er-Prager criterion.
rock engineeringdeformation lawstatistical damageconstitutive model
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