Resumen

LAGUNAS, Jorge A.; AYALA MILIAN, A. Gustavo; BADILLO-ALMARAZ, Hiram  y  ESCAMILLA, Marco A.. Study of seismic events recorded in the proximities of mining centers. Ing. sísm [online]. 2023, n.111, pp.32-56.  Epub 06-Dic-2024. ISSN 0185-092X.  https://doi.org/10.18867/ris.111.645.

In recent years, a significant increase in seismic activity has been observed in areas considered to have low seismicity. This is the case of the state of Zacatecas, Mexico, where a notable rise in seismic events has been recorded in recent years. From 2015 to 2019, 16 earthquakes were registered in the state, while in 2020 alone, the National Seismological Service (SSN) reported 116 seismic events. This study focuses on investigating whether this increase in seismicity is related to the blasting activities of the mines operating in the region. The records of these earthquakes obtained from the SSN's ZAIG station, located in Zacatecas City, are analyzed using different criteria from the literature to distinguish between an earthquake and an explosion. These records are also compared with data obtained from a vibration monitoring campaign carried out in a mine. The results indicate that a considerable number of these earthquakes are directly related to mining activity, suggesting that this is the main cause of the increased seismic activity in the region. Additionally, the vibration levels of the records associated with the mining explosions identified in this work are evaluated against the international ISO standard, which defines different permissible levels according to the type of structure. The results alert authorities and the population about the potential risks associated with mining explosions.

Palabras llave : seismic zone; mining blasting; vibrations; seismicity; mining centers.

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