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讨论了盐岩变形过程中可释放弹性应变能与耗散能内在关系,并给出了基于弹性应变能的破坏准则。为了验证该准则的可行性,一方面利用Mohr准则、D-P准则、基于能量原理强度准则对围压分别为1、5、10、15 MPa一组三轴压缩试验进行了研究;另一方面,应用该准则对来源于其他文献的三轴试验数据就行了研究。研究结果表明,由于该准则仅需确定常规岩石力学参数,物理力学意义明确,试验值与理论值的相对误差较小,因此,该准则可作为盐岩破坏的判据。
The inherent relationship between the releaseable elastic energy and the dissipation energy during the deformation of salt rock is discussed, and the failure criterion based on the elastic strain energy is given. In order to verify the feasibility of the criterion, a set of triaxial compression tests with confining pressures of 1, 5, 10 and 15 MPa respectively were studied using the Mohr criterion, the DP criterion and the energy principle strength criterion. On the other hand, The guidelines study triaxial test data from other sources. The results show that this criterion can be used as a criterion for salt rock failure because the criterion only needs to determine the conventional rock mechanics parameters, the definition of physical mechanics is clear, and the relative error between test value and theoretical value is small.