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基于热力学第一、二定律和系统理论,分析了岩石系统状态与熵变关系;基于岩石系统应力场分布建立了岩石应力场熵计算方法及突变判据;运用岩石破裂过程分析RFPA对岩样进行了加卸载试验,得到了不同情况下的岩石应力场熵值并进行了比较分析。结果表明,基于应力场分布的岩石系统应力场熵值可以反映岩石系统状态演化进程;随岩石均质程度降低,岩石应力场熵值减小,含节理岩石应力场熵值更低;分析、计算和试验结果一致。
Based on the first and second laws of thermodynamics and the system theory, the relationship between rock system status and entropy change was analyzed. Based on the stress field distribution of rock system, the calculation method of rock stress field entropy and the mutation criterion were established. The rock fracture process was analyzed by RFPA After loading and unloading test, the entropy of rock stress field under different conditions was obtained and compared. The results show that the stress field entropy of rock system based on the distribution of stress field can reflect the state evolution of rock system. With the decrease of rock homogenization, the entropy of rock stress field decreases and the entropy of stress field of jointed rock is lower. The analysis and calculation Consistent with the test results.