Experimental analysis of thermally stimulated acoustic emission in various-genotype rock specimens under uniaxial compression

The consistent patterns of low temperature-stimulated acoustic emission (TAE) in rocks of various genotypes and porosity under uniaxial compression are experimentally examined and theoretically based. It is shown that these consistent patterns obtained in magmatic, metamorphic and sedimentary rocks qualitatively coincide. The authors compare limits of deformation stages in the tested rocks, found by a conventional method based on strain measurements in specimens under compression and by the TAE method. It is explained that the thermal acoustic emission phenomena are associated with the transfer of the studied objects between deformation stages depending on the initial faulted-porous structure of a geomaterial. The applicability of the TAE method to controlling stresses and their time and space dynamics in rocks is illustrated.