Orlecka-Sikora, Beata (2009) Perspectives of coulomb stress transfer approach in studies of the interaction among mining-induced seismic events. In: RaSiM 7(2009): Controlling Seismic Hazard and Sustainable Development of Deep Mines. Rinton Press, New York, pp. 737-748. ISBN 978-1-58949-058-1
Full text not available from this repository.Abstract
In recent years many studies of temporal and spatial patterns of seismicity induced by mining works provided the evidence for interrelations of seismic events. Seismicity accompanying mining exploitation is controlled by various time variable natural and anthropogenic factors. In consequence of that the origin of event dependences is complex and difficult to identified. One of the possible causes of interactions among seismic events could be a static stress transfer. Some examples from natural seismicity show that even small stress changes resulting from the coseismic slip can accelerate or prevent future earthquake occurrences. In case of the mining-induced seismicity however, the coseismic stress changes expressed in terms of the Coulomb failure function (CFF) are at least one order smaller than those for earthquakes. Furthermore, they are only a small component of the stress field variations in mines. Despite, the analysis of the Coulomb stress changes caused by mining induced seismic events of energy greater than 105J (ML 2.0), which occurred in Rudna Mine in Legnica-G ogów Copper District in Poland suggests that the mining events are capable of producing changes in the state of stress that are sufficient to influence subsequent events. We find that about 70 per-cent of the analyzed seismic events occurred in areas where stress was enhanced due to the occurrence of previous events. For most of the events located inside areas of a calculated negative CFF changes, their modeled rupture zone is partially located inside stress enhanced, providing thus additional evidence for possible triggering at the nucleation point. Although stress changes alone cannot explain the time evolution of seismicity, they can be incorporated in modeling the future expected seismic activity rate, which is one of the input parameters to the seismic hazard assessment.
| Item Type: | Book Section |
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| Subjects: | Region > Poland > Legnica-Glogow Copper District Inducing technology > Underground mining Methodology > Method and procesing |
| Project: | IS-EPOS project > LGCD: Regional seismicity and ground motion associating underground hard rock mining |