ANALYSIS OF THEORETICAL AND EXPERIMENTAL RESULTS OF HYDRAULIC FRACTURING OF CYLINDRICAL AND SPHERICAL CAVITIES
A. M. Kovrizhnykh1, V. D. Baryshnikov2
1Higher Military Command School of the Ministry of Defense of the Russian Federation, Novosibirsk, Russia
2Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Elastoplastic deformation and rock failure, hydraulic fracturing, failure criteria
Abstract
The problem on elastoplastic deformation and failure of rocks around cylindrical and spherical cavities under the action of internal and external pressure is considered. The pressure during hydraulic fracturing is customary determined by the theory of maximum normal stress. However, the known laboratory experimental studies are not confirmed by this theory. For this reason, it is proposed to determine the limiting pressure using different experimentally justified failure criteria.
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