FIELD: mining.
SUBSTANCE: coal formation sections to be degassed are penetrated by wells so that they cross maximum number of natural fractures over both the entire length and thickness. Note here that pulp formed in drilling is discharged by gravity into operating drifts at, at lest 2-3 degrees to rule out water overpressure in wells and its ingress into formation. Then, wells wherefrom methane releases are connected to degassing pipeline system to output methane to surface, to vacuum station and, further, to consumers.
EFFECT: higher efficiency of coal formation degassing.
2 dwg
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