Analysis of mesomechanical test of rock salt considering coupled stress-dissolving effects under uniaxial compression

作者：Tang Yanchun^*; Zhou Hui; Feng Xiating; Yao Huayan

来源：Chinese Journal of Rock Mechanics and Engineering, 2008, 27(2): 294-302.

• Axial plastic strain
• Coupled stress dissolving effect
• Macro dissolving velocity
• Mesomechanical test
• Rock salt
• Uniaxial compression

Through a large number of mesomechanical tests of rock salts under uniaxial compression considering coupled stress-dissolving effect, the differences of dissolving action on rock salts with/without considering stress are found; and the variation of dissolving action on rock salts considering stress can be described quantitatively with the relationship of dissolved masses. It can also be expressed with macro-dissolving velocity, axial plastic strain, and dissolving time with analyzing the data of the tests. Through analyzing the difference of crack shapes under different crack expansion phases after dissolution, the mechanism of variation of macro-dissolving velocity under different axial plastic strains is studied. Difference of mechanical properties of rock salts with/without considering the dissolving effect has also been achieved. With the gained relationship between stress and dissolving time upon the dissolution stage, the mechanism of variation of mechanical properties of rock salt considering dissolving effect, which is shown as critical stress intensity factor (SIF) of crack that is decreased because of dissolving, has been concluded. The achieved results can provide a foundation for the further analysis of coupled stress-dissolving mechanism of rock salt.

• 出版日期2008
• 单位岩土力学与工程国家重点实验室