The Interrelation between Seismicity and Structural Pattern in the Karvina Part of Upper Silesian Coal Basin

摘要

The rockbursts are a serious danger to coal-mining. They are associated with high stresses caused by multiple factors. In general, the high stress level is produced by the combination of natural stresses and the induced stress. The former are caused by specific geological rock mass properties while mining process is responsible for the latter. The reason of our work is to endorse or to refute the opinion on the influence of geological, mainly structural-tectonic factors, on the recent stress distribution. The seismic observations make it possible to determine the principal stress orientation in the focus field which can be compared with the direction of paleostress derived from the structural-tectonic analysis in the Karvina region.