Browsing by Author "Pytel, Witold M."

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Access status: Open Access ,
Eksploatacja złoża w sąsiedztwie zrobów i stref upodatnionych w świetle doświadczeń praktycznych oraz modelowania numerycznego
(2007) Butra, Jan; Pytel, Witold M.
Bump and roof fall hazard potential is assessed based on the practical observations and numerical (FEM) modeling of mining operations conducted near the already mined-out and/or yielding zones.
Access status: Open Access ,
Uwarunkowania techniczne i geomechaniczne drążenia głównej komory laboratorium astrofizycznego w górotworze kopalni Polkowice-Sieroszowice
(Wydawnictwa AGH, 2011) Pytel, Witold M.
The Polkowice-Sieroszowice mine is considered to be a candidate for the future pan-European underground laboratory analyzed in the framework of the LAGUNA project. The review of the local technical/infrastructural, geological and geomechanical conditions has proved that it is a perfect place to host the 100 kton liquid argon detector. The geomechanical models have been developed and solved using FLAC3D software utilizing the finite differences method. Calculation results have been presented in the form of 3D stress and translation distribution contours, and the areas prone to instability occurrence have been indicated as well. All rocks of the coherent type (anhydrite, dolomite, sandstone) have been modeled as elastic-plastic (some of them ideally plastic, some of them with strain softening). Due to extremely large size of the analyzed object (47.5 m of height, 79 m of the diameter) as well as due to severe consequences of its possible failure, the geomechanical considerations have been performed for a sufficiently large safety margin. The heterogeneous state of the primary stress with different spatial characteristics has been also considered in the analyses.