caa a22 4500 469104732 CHVBK 20180323133053.0 cr unu---uuuuu 170328e19921201xx s 000 0 eng 10.1007/BF01625484 doi (NATIONALLICENCE)springer-10.1007/BF01625484 Peška Pavel Geophysical Institute, Czechosl. Acad. Sci., Prague aut Stress indications in the Bohemian Massif: Reinterpretation of borehole televiewer data [Elektronische Daten] [Pavel Peška] Summary: This paper presents the first results of stress determinations in the Bohemian Massif utilizing televiewer data from deeper boreholes. The televiewer survey was originally carried out by Geological Survey Ostrava for the purpose of studying fractures and bedding in coal basins to depths of 2 km. A reinterpretation of the amplitude logs reveal a large number of stress-induced borehole elongations (breakouts) which occur in a direction perpendicular to the maximum horizontal principal stress (SH). The breakout analysis in the Upper Silesian, Mšeno and Kladno Basins indicates a dominant NW-SE direction of SH which is consistent with the pattern of stress orientation in Western Europe. The NE-SW trend observed in the Plzeň Basin is less reliable. A model for stress magnitude determinations is formulated as a linear programming problem. If the a priori information on rock strength properties is limited, it reduces to explicit formulas for stress regime estimates. The model is applied to data from the Upper Silesian Basin for which a compressional stress regime is derived. Academia, Publishing House of the Czechoslovak Academy of Sciences, 1992 Studia Geophysica et Geodaetica Kluwer Academic Publishers 36/4(1992-12-01), 307-324 0039-3169 36:4<307 1992 36 11200 https://doi.org/10.1007/BF01625484 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01625484 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Peška Pavel Geophysical Institute, Czechosl. Acad. Sci., Prague aut NATIONALLICENCE 773 0- Studia Geophysica et Geodaetica Kluwer Academic Publishers 36/4(1992-12-01), 307-324 0039-3169 36:4<307 1992 36 11200 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer