SEISMIC AND HYDROGEOLOGICAL MONITORING OF LARGE-SCALE BLAST PARAMETERS: A CASE-STUDY OF LEBEDINSKY OPEN PIT MINE, KURSK MAGNETIC ANOMALY
E. M. Gorbunova, S. M. Petukhova, A. G. Ivanov
Academician Sadovsky Institute of Geosphere Dynamics, Russian Academy of Sciences, Moscow, Russia
Keywords: Large-scale blast, iron ore deposit, Lebedinsky open pit mine, PPV, hydrogeological response
Abstract
The authors analyze seismic and hydrogeological data recorded after a large-scale blast on 22 September 2021 in Lebedinsky open pit mine, Kursk Magnetic Anomaly. In blasting of four groups of blocks, the maximum values of PPV are determined at five observation points arranged at the epicentral distances of 1.7-4.9 km, as well as the amplitudes of the hydrogeological response are assessed in two observation wells in overlying rock mass. The main parameters of the blast-induced seismic effect are used to calculate maximum PPV from the earlier found relation. The divergence of the recorded and theoretical data is observed in the near field of the blast in the first group of blocks, at the reduced distances of 106-198 m/kg1/3. In blasting in sedimentary rocks at the reduced distances of 405-512 m/kg1/3, the difference in the wavefield is observed. The research findings can be used in drilling-and-blasting control.
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