The influence of the geological material disturbance on its properties and condition

• Main Authors: O. G. Latyshev, O. O. Kazak
• Format: Article
• Language: deu
• Published: Ural State Mining University 2017-12-01
• Series: Izvestiâ Uralʹskogo Gosudarstvennogo Gornogo Universiteta
• Subjects: rocks and massifs; fracture structure; levels of hierarchy; strength; deformability
• Online Access: http://iuggu.ru/en/archive/2017/4-17/81-en/807-11-4-17
• ISSN: 2307-2091; 2500-2414

The properties of the geological material and rock masses are to a degree defined by their fracture structure, or the disturbance degree. The natural massifs possess the property of hierarchy (M. A. Sadovsky), which consists in the structure’s similarity on different levels of the hierarchy. In accordance with all that, this article deals with the problem of the regularity of the formation of the strength properties as well as deformative characteristics on the level of minute cracks, rock samples and block massifs. The minute cracks survey with the help of the luminescent method of crack detection is the basis of the theoretical treatment of the issues of destructibility of the rock from the energetic viewpoint. In the scale of mineral granules sizes, strength properties as well as deformative characteristics of the rocks are exponentially connected with the samples’ damages on a microlevel. The quantity of the common porosity may serve as a measure of a fracture degree on a representative samples’ level. The statistical dependencies of a given quantity with the basic mechanical characteristics of the rocks have been defined. The properties of the rock mass are defined by its sectional structure and geometrical characteristics of the partings in the scales, which are comparable to the mine working sizes. The sizes of rock blocks are estimated by the Weibull distribution. Considering the intrinsic fractures from the fractal positions allows to define the contact rigidity of their edges and to predict the modulus of the massif deformation. The strength passport of the rock mass is defined with the structural attenuation factor, which is adequately evaluated by the variation of the strength of the adjoining rocks and also by the modulus of fracture array. The regularities defined create the basis for projecting the technology of the processes of rock destruction. The forecast of the strength property and deformation characteristics of the rock mass are the basis of the calculation of stability of underground workings with the finite-element method.