Strength of weak floor strata beneath rock pillars

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dc.contributor.authorPytel, Witold
dc.contributor.authorPałac-Walko, Bogumiła
dc.contributor.organizationKGHM Cuprum Spółka z o.o. Centrum Badawczo-Rozwojoween
dc.contributor.organizationPolitechnika Wrocławskaen
dc.date.accessioned2012-12-31T13:21:49Z
dc.date.available2012-12-31T13:21:49Z
dc.date.issued2011
dc.description.abstractA simplified method for stratified floor strata ultimate bearing capacity (UBC) assessing, in room-and-pillar mining conditions, is presented. The physical problem consists of the following two different cases of rectangular rigid pillar of size B×L resting on a two-layer floor system: (a) with the upper weaker layer of thickness H overlying a stronger, infinite rock deposit. It has been assumed that bearing capacity of floor strata may be analyzed as a shallow foundation problem, using the general bearing capacity equation given by Brinch Hansen with appropriate shape, inclination, and surcharge depth factors, or may be treated as a punching failure problem, particularly in a case of relatively strong upper stratum presence. A broad review of available analytical techniques did show that a finite thickness of the upper weaker layer causes a significant increment/decrement in its ultimate bearing capacity in comparison with homogeneous conditions. The proposed approach has been also validated by numerical modeling utilizing FLAC3D the finite difference computer code.en
dc.description.epersonCzasopismo Cuprum
dc.identifier.citationPytel, W., & Pałac-Walko, B. (2011). Strength of weak floor strata beneath rock pillars. Cuprum, 60(3), 5–14.en
dc.identifier.issn0137-2815
dc.identifier.urihttps://open.icm.edu.pl/handle/123456789/476
dc.language.isoenen
dc.publisherKGHM Cuprum Spółka z o.o. Centrum Badawczo-Rozwojoween
dc.rightsDozwolony użytek*
dc.subjectapproximate approachen
dc.subjectfinite difference methoden
dc.subjectultimate bearing capacityen
dc.subjectweak floor strataen
dc.titleStrength of weak floor strata beneath rock pillarsen
dc.title.alternativeWytrzymałość spągu uwarstwionego obciążonego pod filarempl
dc.typearticleen
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