Effect of Deformation Properties of Discontinuities on Intensity of Induced Seismicity Sources in Rocks. Part I: In Situ Observations
A. N. BESEDINA1, S. B. KISHKINA1, G. G. KOCHARYAN1,2
1Institute of Geosphere Dynamics, Russian Academy of Sciences, Leninskii pr. 38, Bld. 1, Moscow, 119334 Russia
geospheres@idg.chph.ras.ru
2Moscow Institute of Physics and Technology, Institutskii pereulok 9, Dolgoprudny, 141700 Russia
Keywords: индуцированная сейсмичность, сейсмическая энергия, сейсмический момент, горно-тектонические удары, жесткость разломов, induced seismicity, seismic energy, seismic moment, tectonic shocks, fault rigidity
Abstract
The authors analyze mine logs of seismic events in Poland, Finland, Canada, Russia and South Africa. For the analyzed events, induced seismic energy varies by 2-3 orders of magnitude at the same value of seismic moment. The upper and lower limits of the range correspond to “hard” and “tender” sources, respectively. The most probable cause of the wide scatter of the reduced energy values seems to be fluctuating properties of discontinuities due to change in material composition of fracture filler and in water content of rocks.
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