Institute of Integrated Mineral Development – IPKON, Russian Academy of Sciences, Moscow, Russia:

S. D. Viktorov, Deputy Director of Scientific Work, Doctor of Engineering Sciences
A. A. Osokin, Senior Researcher, Candidate of Engineering Sciences
A. V. Shlyapin, Senior Researcher, Candidate of Engineering Sciences, shlyapin@mail.ru
I. N. Lapikov, Senior Researcher, Candidate of Engineering Sciences

Study of formation conditions of micron and submicron particles on exposed rock surfaces under the action of external loads is of signifi cant scientifi c and practical interest. Deformation and destruction of rock mass during mining activities, under infl uence of rock pressure or blasting is characterized by the initiation and growth of structural defects of diff erent scales. To this end, the authors propose the design of rock samples for experimental studies into disintegration and formation of free particles. The article presents the results of the computer modeling of stress–strain state of rock samples with a through cylindrical cavity under uniaxial compression based on the physical model of formation of submicron particles on the sample surface developed by the authors. The size and the nature of change in the zones of stress concentration under quasi-static uniaxial loading of the samples are determined. The loading ranges within which the rock samples transit to the pre-failure state are found. The results obtained are necessary for the development of a fundamentally new method and hardware support for registering dynamic events of rock pressure and to predict rock bursts in underground mines.
The study has been supported by the Russian Science Foundation, Project No. 16-17-00066.

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