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Long-term experience with stress state determination using CCBO probe in various rock mass
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SYSNO ASEP 0519208 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Long-term experience with stress state determination using CCBO probe in various rock mass Author(s) Waclawik, Petr (UGN-S) RID
Staš, Lubomír (UGN-S) RID, ORCID
Souček, Kamil (UGN-S) RID, ORCID
Vavro, Martin (UGN-S) RID, ORCID
Zajícová, Vendula (UGN-S)Number of authors 5 Source Title Rock Mechanics for Natural Resources and Infrastructure Development - Full Papers, Proceedings in Earth and Geosciences, 6. - Leiden : CRC Press/Balkema, 2019 / da Fontoura Sergio A.B. ; Rocca Richardo Jose ; Pavón Mendoza José - ISSN 2639-7749 - ISBN 978-0-367-42284-4 Pages s. 1747-1754 Number of pages 8 s. Publication form Print - P Action International Congress on Rock Mechanics and Rock Engineering (ISRM 2019) /14./ Event date 13.09.2019 - 18.09.2019 VEvent location Foz do Iguassu Country BR - Brazil Event type WRD Language eng - English Country NL - Netherlands Keywords overcoring ; CCBO ; anisotropy Subject RIV DH - Mining, incl. Coal Mining OECD category Mechanical engineering R&D Projects FV20294 GA MPO - Ministry of Industry and Trade (MPO) Institutional support UGN-S - RVO:68145535 Annotation The strain gauge probes of different construction are typically used for determination of stress state of rock mass. The modified overcoring method with the original name Compact Conical ended Borehole Overcoring method (CCBO) for rock mass stress measurement is now commonly used. A conical probe was designed by the Institute of Geonics of the Czech Academy of Sciences (IGN) in cooperation with Kumamoto University in Japan. Many stress measurements using the CCBO probes were carried out in the recent past. These measurements were performed in varied rock mass adjacent to mine excavations. As demonstrated in the particular measurements present in this paper, the deformation responses of rock core can vary in sedimentary, metamorphic or igneous rocks. Some overcoring stress measurements provided implausible data due to high grade rock mass anisotropy. Influence of rock mass properties on evaluation presented in this paper is the main goal of this study. Workplace Institute of Geonics Contact Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Year of Publishing 2020
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