[S02-1] World overview of anthropogenic seismicity I

[S02-1-02] Trigger effects in the development of induced seismicity and the influence of human being over the natural seismicity of Kuzbass and Baikal regions of Russia

^○Victor Seleznev^{1, 2}, Aleksey Bryksin², Aleksey Emanov³, Aleksandr Emanov³, Ekaterina Leskova³, Aleksandr Fateev³ (1.Geophysical Survey of the Russian Academy of Sciences, Obninsk, Russia, 2.Seismological Branch of Geophysical Survey of the Russian Academy of Sciences, Novosibirsk, Russia, 3.Altai—Sayan Branch of Geophysical Survey of the Russian Academy of Sciences, Novosibirsk, Russia)

The upgrowth of induced seismicity near excavations and trigger effects of anthropogenic factors impacting it was studied on the base of experimental data collected by temporary seismological networks placed near coal mines. Experiments were conducted near four coal mines in Kuzbass with different geotectonic conditions. These experiments proved the considerable contribution of powerful mining equipment vibrational loading to the anthropogenic seismicity process. In all cases while seismological networks were placed near excavations with powerful mining equipment, we observed seismic activizations accompanying the mining process. It would be sufficiently reasonable to state that high-production coal mining equipment works at the same time as a powerful vibrational source in subsurface and together with changes in fluid conditions could form pronounced induced seismicity near excavations. The appearance or disappearance of vibration exert influence on seismic conditions of activated area practically immediately. The qualitative assessment, based on the data of seismic events catalogue of Altay-Sayan region, of the influence of human activity on natural seismicity in designated areas is constructed. Local intervention in natural processes on examples of carrying out of industrial explosions at open-cast mining in Kuzbas and operation of a site of the railway along coast of lake Baikal is investigated. Gutenberg-Richter plots (GR-plots) are built for various samples of seismic events on time for Kuzbas region and variations of "b-value" are shown, which depends on time of observation (temporal). Also GR-plots are constructed for various strips along the railway near Baikal lake and the change in 'b-value" is discussed, which depends on offset from the railway (spatial). Finally the experiment with powerful vibration exciter is considered and the hypothesis of discharging effect of powerful influences on short distances is setting up.