Home – Home – Jornals – Fundamental and applied issues of mining 2019 number 2

This paper analyzes parameters of microseismic emission signals: the number of signals accumulated over an interval of 10 s; their amplitudes and frequencies in accordance with the loading stage of the “shear stress - time” diagram when rock samples are loaded by direct shear. The experiments were carried out on intact samples from clayey weathering crust and samples from tuff sandstone with joints having different values of surface roughness. Analysis of MSE signals’ parameters and the shear deformation of rock samples revealed that the “shear stress - time” diagram can be divided into the stages which correlate with its “linear”, non-linear, and the post-peak portions. Each of these stages is associated with specific variations in of MSE signals, which therefore can be used for prediction of failure-time of rocks.