  In this paper, the process of shear deformation of the medium formed by the
cubic grains is investigated experimentally. It is demonstrated that the
deformation process is intermittent and accompanied by the radiation of
acoustic perturbations. These perturbations obey statistical laws that are
inherent in natural seismic processes: the frequency-energy scaling relation
(the Gutenberg-Richter law) and the generalized Omori law for temporal decay of
aftershocks. The weak perturbations influence on the process of shear
deformation is studied for the mono-dispersed medium. During the granular
medium stimulation by weak periodic signals, the existence of a critical
frequency providing the smallest number of critical events in the granular
medium is identified. We also developed the algorithm providing smaller
stresses inside the granular massif by means of external perturbations during
shear deformation. Taking into account the statistical similarity between shear
and seismic processes, these results open prospects for the ability to affect
the natural seismic processes.
