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NomenclatureA(x,t)—Cross_sectionareaoffractureattimetandsitex,m2 ;Bg,Bw —Coalbedgasandwatervolumefactor,di mensionless;b—Langmuirfactor,(MPa) - 1 ;Cg,CR,Cw —Coalbedgas,rockandwatercom pressibilitycoefficient,(MPa) - 1 ;Cp —Sandratio ,dimensionless;Ct(x ,t)—Totalfracturin… 相似文献
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