RELATIONSHIP OF ACOUSTIC EMISSION PARAMETERS WITH DEFORMATION STAGES AND MECHANICAL PROPERTIES OF COAL SAMPLES

Regularities of acoustic emission (AE) manifestation in anthracite samples at various modes and at separate stages of deformation, and also on borders of transitions between the specified stages are experimentally established. Uniaxial tests were carried out with the given loading and displacement rate. Triaxial axisymmetric tests with constant longitudinal deformation rate at various values of a lateral stress were carried out. The relationship of informative AE parameters with mechanical properties and stress state of coal is revealed. Predicting AE attributes of approach dilatancy and destruction of coal are established.