3D S-wave velocity imaging of a subsurface disturbed by mining using ambient seismic noise
Authors:
- Rafał Czarny,
- Zenon Pilecki,
- Nori Nakata,
- Elżbieta Pilecka,
- Krzysztof Krawiec,
- Paulina Harba,
- Maciej Barnaś
Abstract
Seismic interferometry based on ambient seismic noise was used to image the 3D S-wave velocity field of a subsurface disturbed by mining under the geological conditions at the KGHM Rudna copper mine in southwestern Poland. We recorded ambient seismic noise data for 3 months using 11 surface-mounted broadband seismometers located across the mining area. We used ambient-noise cross-correlation techniques to create a three-dimensional S-wave velocity model of the Cenozoic and Triassic formations up to a depth of 500 m. Cross-correlation functions (CCFs) indicate the Rayleigh and Love waves; however, only the Love waves in the 0.19-0.4 Hz frequency range were reliable, based on the symmetry of the CCFs in the positive and negative conditions. Imaging using the Love waves indicated that the changes in the S-wave velocity field in the model may be explained by the subsidence processes occurring above the mined area. The S-wave velocity decreased above the areas of the current mining operations. However, the S-wave velocity increased above older mined areas, probably due to suppression of the subsidence process and progressive consolidation of the geological medium over time. We also observed low-velocity anomalies in the intersection zones of the larger faults, with high energy seismic events. This could be caused by fault activation by current mining operations and a reduction in the stiffness of the layers in the fault intersection zone. This study presents the possibility of imaging the subsurface layers in a mining area using ambient seismic noise. It also has the potential to give a broader insight into how a geological medium responds to mining in terms of protecting the terrain surface and developing mining technologies.
- Record ID
- CUT367940b760f84ded93b93de90405f5e8
- Publication categories
- ;
- Author
- Journal series
- Engineering Geology, ISSN 0013-7952, e-ISSN 1872-6917
- Issue year
- 2019
- Vol
- 251
- Pages
- 115-127
- Other elements of collation
- il. kolor.; Bibliografia (na s.) - 126-127; Oznaczenie streszczenia - Abstr.; Data udostępnienia on-line - 2019-01-24; Numeracja w czasopiśmie - Vol. 251
- Keywords in English
- ambient seismic noise, S-wave velocity
- DOI
- DOI:10.1016/j.enggeo.2019.01.017 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/pii/S001379521831264X Opening in a new tab
- Language
- eng (en) English
- Score (nominal)
- 200
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT367940b760f84ded93b93de90405f5e8/
- URN
urn:pkr-prod:CUT367940b760f84ded93b93de90405f5e8
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.