砂岩节理裂隙贯通的Kolmogorov熵定量判别及应用

Quantitative determination on transfixion of joins by Kolmogolov entropy theory and its application to sandstone

形成岩石全应力应变曲线的时间序列反映了岩石内部节理裂隙趋向贯通的演化进程,砂岩节理裂隙系统在峰前阶段处于不同程度的混沌状态。以岩石力学实验为基础,基于时间序列发展并运用Kolmogorov熵理论提取K熵值,建立了砂岩节理裂隙贯通与否的定量判据,并将其尝试应用于岩石强度准则研究,初步建立了K熵这一微观特征量与宏观力学量之间的关系。

Evolution of rock joints into transfixion is described by the time series from strain-stress curves, and the state of joint system in sandstone is chaotic before its ultimate state. Based on rock mechanical tests and evolution of time series, quantitative criteria to judge whether joints in sandstone specimens had been transfixed were established by Kolmogolov entropy to determine K. These criteria were used to study the ultimate strength of rock, and some relations were set up between macro mechanical parameters and Kolmogolov entropy which was a micro mechanical parameter.