Abstract:To study the basic characteristics of the energy and the acoustic emission angle in the process of rock salt deformation , the uniaxial loading and unloading tests were carried out with pure salt rocks from Pingdingshan and Huaian by using MTS815 Flex Test GT and acoustic emission monitoring system. The research show that the elastic deformation stage is very short, the yielding process produced large plastic deformation, the stress did not decrease sharply after peak, and the hysteresis loop area between loading and unloading curve is always very small under uniaxial loading and unloading conditions. In the whole experiment, the proportion of elastic strain energy is very small; in the process of rock salt deformation and failure, the dissipation energy increases with the increase of the strain, the rate of rise is incremental, the rate of rise tends to be constant when the stress is close to the peak value, and the dissipation energy curve begin to present linear growth; the elastic strain energy increases before the peak of stress, the rate of rise is diminishing, it reaches the peak value at the peak of stress, and it is decreased after the peak of stress. The AE count rate and energy rate emerged in large quantities in the initial stage of the test, then it downward into the stable development period in the yield stage, until the peak of stress, it appear an inflection point accumulative count and cumulative energy curve, it appear the ladder shape development at a higher rate after the peak of stress. This paper has some practical guiding significance in the process of water soluble excavation and the gas recovery of salt rock gas storage.