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Abstract
The fracture of rocks has been investigated theoretically and experimentally. The model of evolution of micro- and macrocracking under the action of electromagnetic fields with the help of rf electrodes has been proposed. The calculation of the fields of temperature and thermoelastic stresses makes it possible to study the evolution of macrocracking and to establish the directions of evolution in the case of their 3D configuration. The mechanisms of the formation of a main crack for regions with different tensile stresses have been established. The main crack can evolve towards the range of tensile stresses lower than the ultimate tensile stress. The possibility of controlling the evolution of the main crack by selecting stresses over the length of the crack formed and the heating time has been demonstrated.
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