Observation of in and out flow from rock specimens and estimation ofthe permeability under the triaxial compression

通过试验研究了渗透系数随强度恢复现象的变化规律。在研究地下结构的长期行为时，强度恢复和渗透系数的降低是非常重要的。对原始岩样、强度恢复过程中的裂隙试件和压实后的压实试件的渗透系数进行了试验研究。在击实试验中，随着轴向荷载的增加，渗透系数逐渐变小。试验结果表明，渗透系数随强度恢复而减小，这是岩体储备库较好的发展趋势。

Variation of the coefficient of permeability with the strength recovery phenomenon was researched experimentally. When investigating the long-term behavior of the underground structures, strength recovery and decrease of the coefficient of permeability are very important. The coefficients of permeability for the original rock specimen, fractured specimen in the progress of strength recovery, and the compacted specimen after the compaction test were investigated experimentally. The coefficient of permeability became small moderately with the increase of the axial load applied in the compaction test. Experimental results from this study showed that the decrease of the coefficient of permeability progressed with strength recovery, which is the preferable trend for the repositories in rock mass.