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Seismic tomography to explore cleft zones below houses in the area of a stress system induced by deep coal mining activities
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 9th EAGE/EEGS Meeting, Sep 2003, cp-52-00012
- ISBN: 978-94-6282-116-3
Abstract
Due to deep coal mining activities dwing the years from 1980 to 2000 in depths between 700 and 1000 m a local stress systcm was induced in the northern part of the Ruhr Area in Germany. Atter strong rainfall in November 2002 this stress system leads to visible clefts at the earth's surface (Figure 1) with a lateral extension of the cleft zone of more than 250 m over arable soil along a country road and directly below a house. To explore the cleft zone below the house the seismic tomography was used to detemine it's extension and dip and additionally to investigate if the cleft zone may have significant influence on the stability of the underground below the house fundaments.