Methods of stress-strain solution of soil body. Basic rheological relations. Rheological models. Conditions of limit equilibrium in space. Limit state of structures, physical fundamentals of plastic deformation, plasticity conditions, limit state of viscous failure, failure at creep. Finite affinities: isotropic and anisotropic materials. Incremental (plastical) affinities: energetical conception, application of dilatantial behaviour, theory of anisotropic hardening. Original and acquired anisotropy. Non-linear behaviour of non cohesive soils due to Konder, Duncan, Chang. Stabilization factor, dilatancy, contractancy. Stress path. Stress path metod. Metod of adjustment and change of structural character of soils and rocks. Interaction of soils and rocks with structures. Low back, plane strain of non-timberwork circular tunnel, plane strain of circle tunnel face, local damage and expression on surface. Settlement of surface due to mining.