Spatial-Temporal Features of Deformation and Fracture of Cenozoic Sedimentations in the Epicentral Zone of the Chuya Earthquake

摘要

In this paper the physical-mathematical model of the stress-strain state evolution of loaded rocks is developed with the purpose of numerical simulation of deformation up to failure of Cenozoic sedimentations typical for epicentral zone of Chuya earthquake. Sedimentations of Chuya and Kuray depressions are represented mostly by clays, pebbles and other loose rocks with different inclusions of calcium phosphate, feldspar, dolomite, quartz, etc. A combination of two models of inelastic behavior is used in this study, namely, an elliptic shaped yield surface for clays and the modified Drucker-Prager-Nikolaevskii model for different inclusions. The psammopelite structure of clay with debris of shark teeth (calcium phosphate) and decomposed feldspar is loaded up to failure.