Abstract：Halite and thenardite，which are the main constitutes in bedded salt rock deposits，are chosen as the experimental samples. The uniaxial compression behaviors of the samples are recorded and analyzed with loading strain rates increasing from 10－5 s－1 to 10－3 s－1. It is found that the ultimate strength and the elastic modulus of the two lithologies hardly change with loading strain rate in the test scale. The uniaxial compressive strength of thenardite is larger than that of halite when they are loaded with the same strain rate. Opposite to the trend of the elastic modulus，the Poisson¢s ratios of the two lithologies decrease with strain rate for the halite and thenardite specimens. Similarly，the strains of the test specimens at the point of peak strength decrease with loading strain rate. A logarithmic relationship between deformation modulus and loading strain rate is also established with the test results. During the experiments，it is found that all the halite specimens are broken in the type of brittle tensile fracture around the specimen column face，while single shear failure along an inclined plane in the specimens is the characteristic of thenardite breakage. The damage characteristics of the halite and thenardite hardly change with the loading strain rate. Stress ratio at the point of the onset of volumetric increase to the ultimate compressive strength of the tested specimens is also calculated and analyzed；and an average value of 87.3%–91.0% of the ratio is recorded，which is obviously larger than those of general rocks. The large ratio demonstrates that salt rocks possess large deformation capacity before volumetric increase occurs during compression. It is concluded that a salt cavern wall of strain rate between 10－5–10－3 s－1 during salt cavern storage operations can guarantee the safety and stability of the cavern，while other operational demands are satisfied.
梁卫国，徐素国，莫江，吴迪，张传达. 盐岩力学特性应变率效应的试验研究[J]. 岩石力学与工程学报, 2010, 29(01): 43-50.
LIANG Weiguo，XU Suguo，MO Jiang，WU Di，ZHANG Chuanda. TEST STUDY OF STRAIN RATE EFFECTS ON MECHANICAL PERFORMANCES OF SALT ROCK. , 2010, 29(01): 43-50.
