中文摘要：

为了对煤层底板关键隔水层的渗透性进行分析，利用瞬态渗透法进行了全应力-应变-渗透性试验。分析了各关键隔水层在应力作用下的应变-渗透性曲线，研究了不同岩石的渗透变化规律。结果表明，渗透性由大到小依次为：粉砂岩、铝土岩、泥岩、灰岩。影响岩石渗透性的因素除岩性外，还有围压大小及其变化速率、原生裂隙及后期裂隙扩展方式、贯通方式等。

英文摘要：

In order to analyze the permeability of the key water isolated stratum under seam floor, the transient permeability method was applied to the full stress - strain - permeability test. The strain - permeability curves of each key water isolated layer under the function of the stress were analyzed and the permeability variation law of different rocks was studied. The results showed that the permeabilities of the rocks from high to low were as followings, the fine sandstone, bauxite stone, mudstone and limestone. In additional to the lithology affected to the rock permeability, there were the scale of the surrounding rock pressure and the variation rate, original fractures and the later fracture extension mode and connection mode affected to the rock permeability.