FIELD: mining industry. SUBSTANCE: fluid is pumped under pressure exceeding weight of rocks lying above. Simultaneously with pumping of fluid into hole slit of hydraulic fracture adjacent to hydraulic fracture is blown with air in specified direction and fluid (gas) is pumped into hole of undesirable under pressure less than weight of rocks lying above. EFFECT: formation of permeable collectors in coal seam by method of hydraulic fracture. 2 cl, 2 dwg
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