METHOD FOR DIRECTED HYDRAULIC FRACTURING OF ROCKS Russian patent published in 1996 - IPC

FIELD: mining; geotechnical mineral mining; applicable in formation of geothermal circulating systems in low-permeable rocks. SUBSTANCE: holes are drilled to the level of hydraulic fracturing. Fluid is supplied through one hole at pressure, and in other holes, at least, two coherent energy sources are arranged at preset distance from the center of initiation and rock mass vibration is effected by the sources at the hole fluid pressure reaching, at least, 90% of the critical value. EFFECT: higher efficiency. 1 dwg