EFFECT OF MULTIPLE WEAK IMPACTS ON CREEP AND VELOCITY OF ELASTIC LONGITUDINAL WAVE PROPAGATION IN GEOMATERIALS
E. A. Zapysova, V. P. Kosykh
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Strains, stresses, weak impacts, longitudinal wave propagation velocity, geomaterials
Abstract
The results of an experimental study of the effect of multiple weak impacts on the creep of a sample of equivalent geomaterial loaded with a static pressure are presented. It is found that at long-term weak impacts, the creep rate initially increases and then decreases to a stationary value. Weak impacts initiate the elastic strain wave passing through the sample. The propagation velocity of this wave increases non-monotonically with an increase in the number of impacts. It is related to the change in sample internal structure due to external loads.
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