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Assessment of coal pillar behaviour at great depth using numerical models
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SYSNO ASEP 0519191 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Assessment of coal pillar behaviour at great depth using numerical models Author(s) Sahendra, R. (IN)
Ashok, K. (IN)
Waclawik, Petr (UGN-S) RID
Kukutsch, Radovan (UGN-S) RID, ORCID
Kajzar, Vlastimil (UGN-S) RID, ORCID
Němčík, J. (AU)Number of authors 6 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. 2812-2820 Number of pages 9 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 coal pillar ; monitoring ; numerical modelling Subject RIV DH - Mining, incl. Coal Mining OECD category Mechanical engineering Institutional support UGN-S - RVO:68145535 Annotation Room and Pillar method was used to develop shaft protection pillar, below 850 m from the surface at CSM mine of Upper Silesian Coal Basin of Czech Republic. First panel V was developed on rhomboid shaped pillars of different sizes by driving roadway of 3.5-4.5 m in height and 5.2 m in width. Field study was conducted using different geo-technical instruments. This study revealed that core of the pillar is softening too due to yielding characteristics. Further, to understand the behaviour of coal pillar, numerical modelling was carried out using FLAC3D. Mohr-Coulomb strain-softening and Mohr-Coulomb plasticity constitutive models were adopted for coal seam/poor strata and competent strata respectively. The extent of yielding of coal pillar was decided by the observed contour of the stresses and tensile/shears failure in the model. Results obtained on numerical models were validated and found to be in good tune with the actual monitored pillar behaviour. Workplace Institute of Geonics Contact Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Year of Publishing 2020
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