Abstract
A multistage test under conventional triaxial compression is an alternative way (instead of triaxial tests on a set of samples) to describe the mechanical strength (the envelope of the Coulomb-Mohr half-circles) of rocks. This paper is based on the experimental study of sandstones under multistage triaxial compression. Empirical dependencies of the modulus of elasticity, Poisson’s ratio, the specific energy intensity on each of the stages are discussed. The Coulomb-Mohr envelopes are constructed. Tests of rocks under multistage triaxial compression can be suitable in case of a very limited number of specimens.
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