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Influence of depressurization rate on gas production capacity of high-rank coal in the south of Qinshui Basin, China
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SU Xuefeng,LIU Yan,CUI Zhouqi,ZHANG Jianguo,YU Li,WANG Kai
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Table 4 Statistics on gas production in the early stage under different depressurization rates.
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Depressurization
rate/(MPa·d-1) | Starting time of rapid
desorption/h | Gas production in the first 24 h
of depressurization/mL | Gas production after 48 h
into depressurization/mL | Periodical gas
production/mL | Gas production
after 72 h/mL | | 3.0 | 48 | 233.7 | 251.0 | 17.3 | 1 221 | | 1.0 | 69 | 8.5 | 21.7 | 13.2 | 155 | | 0.5 | 142 | 1.5 | 13.9 | 12.4 | 105 | | 0.3 | 138 | 0 | 0 | 0 | 16 |
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