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Modelling the Sensitivity of Underground Space Stability to the In Situ Stress Uncertainties: Case Study at the Bukov Underground Research Facility Phase II (Rožná Mine, Czechia)
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SYSNO ASEP 0546770 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Modelling the Sensitivity of Underground Space Stability to the In Situ Stress Uncertainties: Case Study at the Bukov Underground Research Facility Phase II (Rožná Mine, Czechia) Author(s) Gong, Libin (UGN-S)
Souček, Kamil (UGN-S) RID, ORCID
Waclawik, Petr (UGN-S) RID
Vavro, Martin (UGN-S) RID, ORCID
Staš, Lubomír (UGN-S) RID, ORCID
Němčík, J. (AU)
Ram, S. (IN)Number of authors 7 Source Title Acta geodynamica et geomaterialia. - : Ústav struktury a mechaniky hornin AV ČR, v. v. i. - ISSN 1214-9705
Roč. 18, č. 3 (2021), s. 319-334Number of pages 16 s. Publication form Online - E Language eng - English Country CZ - Czech Republic Keywords numerical modeling ; in situ stress ; strength-stress ratio ; roadway convergence ; stability model Subject RIV DH - Mining, incl. Coal Mining OECD category Mining and mineral processing Method of publishing Open access Institutional support UGN-S - RVO:68145535 UT WOS 000729653600003 EID SCOPUS 85120807835 DOI 10.13168/AGG.2021.0022 Annotation Numerical modelling has been widely used in the underground excavation design, where the in situ stress state plays a crucial role in the stability analysis. However, determination of an exact
stress state for a specific geological region remains uncertain due to the complicated tectonic nature and measurement limitations. The stability is thus better analysed by considering the in situ
stress as a finite spectrum and pinpointing the possible worst-case scenario. The most probable scenarios of in situ stress states in the Rožná mine area were analysed based on the varying trends
in principal stress ratio and mean stress values obtained from four different measurement/analysis campaigns. The influence of different in situ stress judgement on the deformation and failure
characteristics of the Bukov Underground Research Facility (URF) (Phase II, Czech) were investigated by the finite volume program FLAC3D. Results show that the increased horizontal
stress anisotropy and the mean stress level jointly increase the overall deformation and lower the URF stability. Such influences on the roadway horizontal convergence are more considerable than
the vertical ones. A mathematical model considering mean stress and horizontal stress ratio was proposed to quantitatively describe the overall stability, especially useful for excavations possessing complicated configuration.
Workplace Institute of Geonics Contact Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Year of Publishing 2022 Electronic address https://www.irsm.cas.cz/index_en.php?page=acta_detail_doi&id=403
Number of the records: 1