FEM MODELING OF ACTIVE RELEASE OF ACCUMULATED ELASTIC ENERGY IN THE ROCK MASS NEAR A CIRCULAR OPENING
S. V. Lavrikov, A. F. Revuzhenko
Chinakal Mining Institute, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Rock mass, self-balanced stresses, energy release, modeling
Abstract
A plane mathematical model taking into account the property of the geomedium to store the energy of internal self-balanced stresses is constructed on the basis of the concept of a rock mass as a medium with internal sources and sinks of energy. A numerical FEM-algorithm is proposed for calculating quasi-static problems of deformation of a rock mass near openings, taking into account dynamic softening jumps. It is shown that boundary unloading can result in stability loss of the opening.
|
