The impact of mine blasting on the occurrence of human-induced tectonic earthquakes in the eastern Orenburg region

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The geodynamic situation is analyzed in the area of the eastern Orenburg region for 2006-2022. The number of recorded seismic events averages 742 events per /year. The impact of mining works on the increase of technogenic seismicity is considered. It is established that most of seismic events occur in the territories near the developed mineral deposits. The technogenic earthquakes with a magnitude Ml > 3.0 were analyzed. The reasons of intensifying technogenic-tectonic seismicity are revealed. The specific features of strong (Ml ≥ 3.0) technogenic-tectonic earthquakes under the dynamic effects of blasting operations upon mining are described. The time dependence between the explosions carried out at industrial sites and the recorded seismic events (correlation coefficient 0.89) is found. The types of technogenic seismicity, static and dynamic, are considered. Recurrent dynamic impacts of blasting operations can trigger the stress state discharge in tectonic structures. Geodynamic events with magnitude Ml ≥ 4.0 exert the most hazardous impact on industrial and civil buildings and structures; they also affect the environmental situation in the region and the population safety. The zoning of territory was carried out, and two separate areas were distinguished with an elevated number of recorded seismic events with a magnitude of Ml > 3.0, i.e., Adamovsky and Yasnensky districts.

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作者简介

M. Nesterenko

Orenburg Federal Research Center, Ural Branch of the Russian Academy of Sciences

编辑信件的主要联系方式.
Email: n_mu@mail.ru

Department of Geoecology

俄罗斯联邦, ul. Naberezhnaya 29, Orenburg, 460014

V. Belov

Orenburg Federal Research Center, Ural Branch of the Russian Academy of Sciences

Email: n_mu@mail.ru

Department of Geoecology

俄罗斯联邦, ul. Naberezhnaya 29, Orenburg, 460014

E. Galeeva

Orenburg State University

Email: galeevskoe@mail.ru
俄罗斯联邦, pr. Pobedy 13, Orenburg, 460018

参考

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2. Fig. 1. The territory of the eastern part of the Orenburg region. The red dash-dotted line indicates the seismic zoning zone according to OSR-2016 data (in MSK-64 scale points).

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3. Fig. 2. The location of epicenters of seismic events in the eastern part of the Orenburg region in the period 2006-2022.

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4. Fig. 3. Distribution of seismic events in the eastern part of the Orenburg region by magnitude for 2004-2021.

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5. Fig. 4. Location of epicenters of man-made tectonic earthquakes in the eastern part of the Orenburg region in the period 2007–2022 with a magnitude range of 3.0–3.4, 3.5–3.9 and 4.0–4.5.

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6. Fig. 5. Correlation graphs of industrial explosions at the Kiembaevsky (a) and Vesenniy (b) mines with seismic events in the near radius of about 20 km for the period 2018–2020.

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