煤层的透射率被发现是大于普通岩石一个或两个数量级.一般煤层的透射率随着深度减少而减少.不过,在相近的有相通的厚度和深度的煤层中透射率的差异玩玩是三个或四个数量级.这是由于地层断裂,岩层分离,以及无处不在的岩层夹层的原因. (Harlow and LeCain 1993).
英语翻译The transmissivity of coal seams was found to be be one
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