Assessment of Quantitative Aftershock Productivity Potential in Mining-Induced Seismicity
PBN-AR
Instytucja
Instytut Geofizyki Polskiej Akademii Nauk
Informacje podstawowe
Główny język publikacji
angielski
Czasopismo
PURE AND APPLIED GEOPHYSICS (25pkt w roku publikacji)
ISSN
0033-4553
EISSN
1420-9136
Wydawca
BIRKHAUSER VERLAG AG
DOI
URL
Rok publikacji
2017
Numer zeszytu
Strony od-do
925–936(2017)
Numer tomu
174
Identyfikator DOI
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Autorzy
(liczba autorów: 2)
Słowa kluczowe
angielski
Mining-induced seismicity
aftershocks
static
stress transfer
Streszczenia
Język
angielski
Treść
Strong mining-induced earthquakes exhibit various aftershock patterns. The aftershock productivity is governed by the geomechanical properties of rock in the seismogenic zone, mining-induced stress and coseismic stress changes related to the main shock’s magnitude, source geometry and focal mechanism. In order to assess the quantitative aftershock productivity potential in the mining environment we apply a forecast model based on natural seismicity properties, namely constant tectonic loading and the Gutenberg-Richter frequency-magnitude distribution. Although previous studies proved that mining-induced seismicity does not obey the simple power law, here we apply it as an approximation of seismicity distribution to resolve the number of aftershocks, not considering their magnitudes. The model used forecasts the aftershock productivity based on the background seismicity level estimated from an average seismic moment released per earthquake and static stress changes caused by a main shock. Thus it accounts only for aftershocks directly triggered by coseismic process. In this study we use data from three different mines, Mponeng (South Africa), Rudna and Bobrek (Poland), representing different geology, exploitation methods and aftershock patterns. Each studied case is treated with individual parameterization adjusted to the data specifics. We propose the modification of the original model, i.e. including the non-uniformity of M0, resulting from spatial correlation of mining-induced seismicity with exploitation. The results show that, even when simplified seismicity distribution parameters are applied, the modified model predicts the number of aftershocks for each analyzed case well and accounts for variations between these values. Such results are thus another example showing that coseismic processes of mining-induced seismicity reflect features of natural seismicity and that similar models can be applied to study the aftershock rate in both the natural and the mining environment.
Cechy publikacji
discipline:Geofizyka – dziedzina nauk o ziemi
discipline:Geophysics – field of earth sciences
Original article
Original article presents the results of original research or experiment.
Oryginalny artykuł naukowy
Oryginalny artykuł naukowy przedstawia rezultaty oryginalnych badań naukowych lub eksperymentu.
Inne
System-identifier
PBN-R:762697
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