Keywords coalbed gas;the pore-fissure double-medium model;finite difference method;storage and transportion law;recoverability evaluating;fuzzy mathematic assessment;throughput capacity sensibility;

• 煤层气;孔隙-裂隙双重介质模型;有限差分方法;储运规律;可采性评价;模糊数学评价;产能敏感性;