| 摘要 |
FIELD: mining.SUBSTANCE: method involves driving in extraction pillar of conveyor, ventilation and intermediate gates, supply of fresh air to the face via ventilation and intermediate gates, drilling of degassing holes at the interval of 20÷25 m as to the bed rise, that is 5÷10 m before ventilation gate, and as to the bed dip with the hole outlet to the board of conveyor gate; drying of the bed by free efflux of formation water through holes to intermediate and conveyor gates. After the bed is dried, cement plugs are installed in the holes entering the board of conveyor gate, interval hydraulic factures of the bed are performed in degassing holes with the distance between hydraulic fracture cracks of 10÷15 m.EFFECT: intensification of methane filtration rate is provided.1 dwg |
