ABSTRACT
The phenomenon of rock mass zonal failure (disintegration) has been known lately. For the safety mining operations it is necessary to know the regularities of zonal mesostructures behavior around deep mine openings. In this paper dependences from influencing factors of the first failure zone radial extent, of the depth of the contour zone and the first failure zone merging, and the depth of the second failure zone appearance are investigated. In that, the non-Euclidean model of a rock mass zonal failure around deep openings and the Odintsev’s criterion of the failure under compression were used. The influencing factors are the uniaxial compression strength of the rock σc , MPa; the opening depth H, m; the relative rock tenseness γr × H/σc; the ratio of empirical coefficients γ3/γ1; the values of the rocks elastic modulus, and the Poisson’s ratio, v. The study was carried out for hard rocks. The regularities established for hard rocks can be shown to be also valid for low-strength rocks.
