FIELD: pulsating degassing. SUBSTANCE: method involves drilling holes into bed, sealing-off their mouth, measuring gas pressure in wells, filling them repeatedly with gas and expelling said gas therefrom. Upper and lower critical gas pressures in well are given. Effective distance is determined between pulsating wells along with procedures for their making in coal seam. EFFECT: higher efficiency. 6 cl
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DEVICE FOR PULSING DEGASSING OF BEDS | 1990 |
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METHOD OF OPENING-UP OUTBURST-PRONE SEAM | 0 |
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Authors
Dates
1994-06-15—Published
1990-12-05—Filed