| 摘要 |
FIELD: mining.SUBSTANCE: proposed method comprises drilling of degassing well on the seam, making of permeability channels around said well, water removal and methane extraction. At seam degassing, well mouth is periodically closed and opened. Note here that closure is performed for 1-3 days while opening duration is limited by time required for attainment of maximum methane yield in previous period. Besides, air is forced in degassing wells at zero yield before first closure at absolute pressure over 6 bar to develop starting channels of permeability.EFFECT: ten-fifteen times increase in methane yield, intensified degassing and reduced gas content.2 cl, 3 dwg |
