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Journal of Mining Sciences

2020 year, number 3

Weak Induced Seismicity in the Korobkov Iron Ore Field of the Kursk Magnetic Anomaly

A. N. Besedina, S. B. Kishkina, G. G. Kocharyan, V. I. Kulikov, D. V. Pavlov
Academician Sadovsky Institute of Geosphere Dynamics, Russian Academy of Sciences, Moscow, 119334 Russia
Keywords: Индуцированная сейсмичность, сейсмический мониторинг, подземная разработка месторождений, геодинамическая активность, очаговые параметры, магнитуда, Induced seismicity, seismic monitoring, underground mining, geodynamic activity, source parameters, magnitude

Abstract

The article presents the analysis of seismic observations in mine roadways. The recorded seismic signals are connected with dynamic deformation of rock mass under massive blasting. The source of induced seismicity are dynamic movements of rocks with an amplitude of 3-30 μm along fractures 1-15 m long. These events feature low values of reduced energy, probably, due to shallow depth of mining. Distribution of induced seismicity events in time and space agreed with patterns of larger seismic events due to remote earthquakes, which implies weak probability of nasty geodynamic phenomena in the course of mining in the Korobkov Field.