Lasocki, Stanislaw and Olszewska, Dorota (2017) GROUND MOTION PREDICTION EQUATIONS FOR MINING INDUCED SEISMICITY IN LEGNICA GLOGOW COPPER DISTRICT IN POLAND. In: 16th World Conference on Earthquake, 16WCEE 2017, 9th to 13th 2017, Santiago Chile.
|
Text
WCEE_Lasocki_Olszewska_fin.pdf - Accepted Version Download (963kB) | Preview |
Abstract
Compared to tectonic earthquakes, the seismic events induced by technological activity are weak to moderate but due to their shallowness, they can result in significant ground motion. Furthermore, specific features of such seismic sources cause that the ground effects of these events do not follow ground motion propagation rules worked out from observations of tectonic earthquakes. In particular, these ground effects depend on source directivity and path and site properties much stronger than the ground motion due to tectonic earthquakes. Following, the ground motion prediction equation should be site-specific and should take into account the source mechanism and space-time clustering of sources. We present here new ground-motion prediction equations, relevant for mining seismic activity in underground copper mines in Legnica-Glogow Copper District in Poland which have been developed taking into account the above considerations. The ground motion database, comprising 4533 signals, makes it possible to split ground motion prediction equations into classes, linked to similar source mechanisms or linked to similar locations. It has turned out that the normal and odd faulting events induce in general stronger motion than the thrust faulting and non-DC events. Also, the membership of seismic sources to particular clusters of seismicity has proved to discriminate significantly the resultant ground motion amplitudes. This effect seems to be related to mining conditions.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Application references: | GMPE |
| Subjects: | Methodology > Method and procesing > Probabilistic seismic hazard analysis - stationary > Source effect Methodology > Method and procesing > Probabilistic seismic hazard analysis - stationary > Path and site effects Region > Poland > Legnica-Glogow Copper District Inducing technology > Underground mining |
| Project: | IS-EPOS project > LGCD: Regional seismicity and ground motion associating underground hard rock mining |