Assessment of the Physico-Mechanical Properties of Carbonate Rock Mass Using Hoek-Brown Failure Criterion

The article describes the procedure and provides the results of evaluating the physico-mechanical properties of carbonate rock in Moscow mass using the Hoek-Brown failure criterion. A comparison of the strength and deformation properties of the rock mass and the sample specimens is carried out and a conclusion is made about their significant decrease during the transition from the sample to the rock mass, which is estimated through the coefficient of structural weakening. It is shown that the values of the deformation modulus calculated using the Hoek-Brown model are generally comparable with the pressiometry data.