In order to study the salt rock damage evolution characteristics in a certain ground temperature

brine and ground stress of the geological environment during the construction process of energy underground storage

the acoustic emission (AE) method is used to analyze the uniaxial compression damage process of salt rock with the combined effect of temperature and saturated brine. It is found that the uniaxial compressive strength and elastic modulus of salt rock samples are slightly lower after soaked in brine for 30 days. The changed peak strength of salt rock caused by saturated brine is not obvious. It is means that brine mainly works on dissolution effect on salt rock while with little soak weakening effect. The stress-strain curves and the acoustic emission-strain curves of salt rock have good consistency in the process under uniaxial compression tests; and the cumulative AE number increases with the increasing brine temperature. The salt rock samples soaked in the brine are usually with lower AE rate and AE number after the temperature and brine actions. In the construction period of salt cavern

salt rocks may lose slightly the strength but gain damage recovery due to brine. This feature of salt rock is conducive to security and stability during salt cavern construction.