FIELD: production and processing of building materials. SUBSTANCE: method includes originating a kerf on lateral faces of rock block. Electrodes are installed in these kerfs, and pressed down to kerf bottom. The electrodes are connected to high- voltage pole of high-frequency generator. Another pole is grounded. A gap between the block to be processed and ground is set to be filled with air or other dielectric. Crack growth process may be controlled by placing electrodes on adjacent block faces and/or connecting and disconnecting special electric loads. EFFECT: high accuracy. 3 cl
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