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Determination of physical-mechanical properties of rock for the purpose of rock mass stress calculation based on CCBO probes measurements
 Staš, Lubomír ; Waclawik, Petr ; Souček, Kamil ; Vavro, Martin
To measure the primary stress of the rock mass, the overcoring method was used using a compact conical probe CCBO. A total of four stress measurements were performed in a metamorphic rock mass formed by biotite gneiss, in a horizontal borehole marked VRT-H. For the purposes of calculating the size of the main rock mass stress components, it is necessary to know the basic physico-mechanical properties of the rock mass at the measurement site. For this reason, test specimens were prepared from the drill core, which were subsequently tested on the ZWICK 1494 mechanical press. The research report describes the samples, methodological procedures and results of physico-mechanical properties.
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