Abstract:According to the characteristics of salt rocks of Chinese energy underground storage which is high impurity uniaxial experiments were carried out on the pure salt rocks

argillaceous salt rock

halopelite

glauberite salt rock and glauberite rock . All of these specimens were taken from a proposed salt rocks reservoir

and then were divided by the impurity content and type . Through experimental study

the following results were obtained: (1) both the mudstone impurity and glauberite rock impurity can increase the compressive strength of pure rock salt and reduce its deformability

glauberite rock impurity has more influence on rock salt than the mudstone impurity;(2) with the increase of mudstone impurities

the active area of AE counts is postponed

high energy rate is over backwards

cumulative AE counts curve and the accumulative energy curve presented by the changing process from convex to concave;(3) with the increase of glauberite rock impurities

the time when the maximum AE count appeared was backwards

the AE counts and energy rate was relatively stable through the whole test

the accumulative energy - strain curve step growth more obviously.