A NEW UNDERSTANDING OF POST-FAILURE BEHAVIOUR OF ROCK

The complete stress-strain curve of rock specimens under uniaxial compression is of sigaificant importance in the geomechanical research and engineering application. In this paper analysis is made on the conditions, under which the post-failure curves of type Ⅰ and type Ⅱ are formed, and from the viewpoint of energy, based on the newest experimental data, a discussion is conducted, which shows the irrationability of the curve of type Ⅱ. A new opinion on the post-failure behaviour is presented.
The newest experimental results used here are obtained by means of the test machine of adaptive control for the purposes of rock mechanics, which is developed by the authors of paper.