METHOD OF MINING OF OUTBURST-PRONE AND GASSY COAL SEAMS Russian patent published in 2003 - IPC

FIELD: mining; applicable in mining of outburst-prone and gassy coal seams by mining complexes of high productive capacities. SUBSTANCE: method includes drilling of vertical holes down to floor of protective seam, combustion of coal of protective seam and withdrawal of combustion products to surface. Driven preliminarily are drifts for extraction of hazardous seam by long pillars with longwall by mining complex. Hydraulic fracturing is performed from vertical holes. Draining holes are drilled between drifts, and interseam holes are drilled from drifts, with filtering channels driven between bottom holes of interseam holes. Pair of said channels are used for forming of fire face whose length is determined from expression given in invention description. Heating up to 100C and heat degassing of outburst-prone and gassy seam with steam produced by combustion of substandard coal of protective seam in one panel with width equaling length of fire face. Radius A of hydraulic fracturing is selected from condition of R=0.7L, where L is length of extraction block. EFFECT: provided safety and high intensity of underground mining of outburst-prone and gassy seams, increased complexness of utilization of energy resources of coal series and methane produced by coal series degassing. 2 cl, 3 dwg