.... The results show that acoustic emission count rate and energy rate are small for two kinds of samples in the initial state during uniaxial compression; in the elastic deformation stage, increase of AE counts is stable and little for halite and thenardite, respectively; in the plastic deformation stage, halite...

... their axial strains presented the law of changes during three stages: a. Initial deformation stage: The model speci- men was reinforced during this stage, and pre- fractures and micro-fractures were consolidated. Moreover, the defects of the specimen began to produce a large number of micro-cracks. The axial...