Acoustic Emission during Different–Mode Inter–Block Movement
G. G. KOCHARYAN1,2, A. A. OSTAPCHUK1
1Institute of Dynamics of Geopsheres, Russian Academy of Sciences, Leninskii pr. 38, Bld. 1, Moscow, 119334 Russia
2Moscow Physico-Technical University, Institutskii per. 9, Dolgoprudny, 141700 Russia
Keywords: rockburst, induced earthquake, fault, deformation mode, acoustic emission, seismic monitoring
Abstract
The article reports the lab experimentation on seismic/acoustic emission during different mode inter-block movement in rock mass. The fact that co–seismic displacement under induced earthquakes occurs along the existing interfaces is the basis for relatively simple tests on a slider-model plant. Using different materials as fracture fillers allowed modeling entire range of probable deformation modes. The deformation modes are conditionally grouped as creep or steady–state sliding, unsteady-state sliding and regular discontinuous sliding or stick-slip. The authors show that statistics of acoustic emission during sliding is described using the Gutenberg–Richter law. The largest “representative” events under shearing occur quasi–regularly, with probability much higher than follows from the law of frequency. The functional relation is found between the acoustic emission energy and the shear velocity.
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