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Stabilita chodeb při dobývání uhlí metodou chodba-pilíř ve velkých hloubkách
Šňupárek, Richard; Waclawik, Petr; Kukutsch, Radovan
2018 - Czech
Za účelem ověření napěťo-deformačních projevů dobývání metodou chodba-pilíř v hloubce až 900 m pod povrchem byl implementován rozsáhlý systém geotechnického monitoringu a sledování deformací a pohybu povrchu. Na základě výsledků napěťo-deformačního monitoringu byla provedena podrobná analýza stability chodeb z hlediska konvergence, deformačního chování okolního horninového masivu a funkce použité výztuže ve dvou sledovaných oblastech s rozdílnými geologickými i provozními podmínkami. In order to verify the stress-strain manifestations of the corridor-pillar excavation at a depth of up to 900 m below the surface, an extensive system of geotechnical monitoring and observation of deformations and surface movement was implemented. Based on the results of the stress-strain monitoring, detailed analysis of corridor stability from the point of view of the convergence, deformation behavior of the surrounding rock mass and the function of the reinforcement used in the two monitored areas with different geological and operational conditions was carried out.
Keywords:
corridor-pilar; geotechnical monitoring; deformations and surface movement
Available in a digital repository NRGL
Stabilita chodeb při dobývání uhlí metodou chodba-pilíř ve velkých hloubkách
Za účelem ověření napěťo-deformačních projevů dobývání metodou chodba-pilíř v hloubce až 900 m pod povrchem byl implementován rozsáhlý systém geotechnického monitoringu a sledování deformací a pohybu ...
Geodiverzita, sekundární gediverzita a kulturní dědictví
Kirchner, Karel; Kubalíková, Lucie; Kuda, František; Havlíček, M.; Machar, I.; Pechanec, V.
2018 - Czech
V rámci projektu NAKI II - Kulturní dědictví krajiny Arcidiecéze olomoucké - výzkum, prezentace a management (DGB 16P02B014) se zaměřujeme na výsledky, které přispějí k udržitelnému rozvoji regionální kulturní identity prostřednictvím aplikovaného výzkumu kulturního dědictví v kulturní krajině studované oblasti. Součástí hmotného kulturního dědictví jsou tvary reliéfu, které vznikly vědomou činností člověka - antropogenní tvary reliéfu. Tyto antropogenní tvary doplňují geodiversity krajiny a jsou označovány jako sekundární geodiversita, jejich identifikace a interpretace umožní doplnit a zvýšit rozmanitost kulturního dědictví a upřesnit rozvoj kulturní krajiny. První výsledky z Arcidiecéze olomoucké jsou prezentovány. Within the framework of the NAKI II project – Cultural heritage of landscape of the Archdiocese of Olomouc - research, presentation and management (DGB 16P02B014), we focus on the results that will contribute to the sustainable development of regional cultural identity through applied cultural heritage research in the cultural landscape of the area of interest. As part of the material cultural heritage, we include the landforms that originated from the conscious activity of man - the anthropogenic relief forms. These landforms complement the geodiversity of the landscape and are referred to as secondary geodiversity, their identification and interpretation will make it possible to complement and enhance the diversity of cultural heritage and to specify the development of the cultural landscape. The first results from the Archdiocese of Olomouc are presented.
Keywords:
geodiversity; secondary geodiversity; cultural heritage; Archdiocese of Olomouc
Fulltext is available at external website.
Geodiverzita, sekundární gediverzita a kulturní dědictví
V rámci projektu NAKI II - Kulturní dědictví krajiny Arcidiecéze olomoucké - výzkum, prezentace a management (DGB 16P02B014) se zaměřujeme na výsledky, které přispějí k udržitelnému rozvoji regionální ...
Použití modelu efektivní trhliny k analýze odezvy válcových těles se šípovým zářezem
Halfar, P.; Frantík, P.; Šimonová, H.; Daněk, P.; Keršner, Z.; Vavro, Leona; Vavro, Martin
2018 - Czech
Příspěvek uvádí aplikaci modelu efektivní trhliny k analýze odezvy válcových těles se\nšípovým zářezem namáhaných v tříbodovém ohybu. Jednalo se o testy tří zkušebních\ntěles z pískovce z lokality Javorka a tří betonových těles z nosné konstrukce nádražní\nbudovy v Ostravě-Vítkovicích. K výpočtům byl použit akademický software\nchevroncylinder na bázi metody konečných prvků. This paper introduces the application of an effective crack model to analyse the response\nof chevron-notched cylindrical specimens loaded in three-point bending. There were\nanalysed the three sandstone specimens from the Javorka locality and three concrete\nspecimens from the building structure of the Ostrava-Vítkovice railway station. The\nchevroncylinder software based on the finite element method was used for the\ncalculations.
Keywords:
fracture test; effective crack model; chevroncylinder software; sandstone; concrete
Available in digital repository of the ASCR
Použití modelu efektivní trhliny k analýze odezvy válcových těles se šípovým zářezem
Příspěvek uvádí aplikaci modelu efektivní trhliny k analýze odezvy válcových těles se\nšípovým zářezem namáhaných v tříbodovém ohybu. Jednalo se o testy tří zkušebních\ntěles z pískovce z lokality ...
Assessment of anthropogenic landforms for the geotourism purposes (case study: Velké Opatovice fortification site, Archdiocese of Olomouc, Czech Republic)
Kirchner, Karel; Kubalíková, Lucie; Machar, I.
2018 - English
The human impact on the relief is often very devastating: natural landforms are modified, damaged or destroyed and the intensity of human-induced processes even surpasses the natural ones. However, people also create new landforms which are interesting from geoconservation, educational, cultural and historical points of view. Thanks to these aspects, they also have a potential for geotourism, geoeducation and recreation. For the assessment of anthropogenic landforms (respectively anthropogenic geosites and geomorphosites), a method based on the concept of geomorphosties and taking into account the holistic approach to geotourism, is proposed. The article presents an example of anthropogenic landforms on geo-cultural site Velke Opatovice fortification site situated in the western part of the Archdiocese of Olomouc. Based on the detailed fieldwork, the inventory of landforms and other features, the assessment and some proposals for geotourist use of the site are presented.
Keywords:
geo(morpho)sites; cultural heritage; Archdiocese of Olomouc
Available in a digital repository NRGL
Assessment of anthropogenic landforms for the geotourism purposes (case study: Velké Opatovice fortification site, Archdiocese of Olomouc, Czech Republic)
The human impact on the relief is often very devastating: natural landforms are modified, damaged or destroyed and the intensity of human-induced processes even surpasses the natural ones. However, ...
Implicit constitutive solution scheme for Mohr-Coulomb plasticity
Sysala, Stanislav; Čermák, M.
2017 - English
This contribution summarizes an implicit constitutive solution\nscheme of the elastoplastic problem containing the Mohr-Coulomb yield cri-\nterion, a nonassociative \now rule, and a nonlinear isotropic hardening. The\npresented scheme builds upon the subdifferential formulation of the \now rule\nleading to several improvements. Mainly, it is possible to detect a position\nof the unknown stress tensor on the Mohr-Coulomb pyramid without blind\nguesswork. Further, a simplifed construction of the consistent tangent opera-\ntor is introduced. The presented results are important for an efficient solution\nof incremental boundary value elastoplastic problems.
Keywords:
Mohr-Coulomb plasticity; implicit constitutive solution scheme; consistent tangent operator
Fulltext is available at external website.
Implicit constitutive solution scheme for Mohr-Coulomb plasticity
This contribution summarizes an implicit constitutive solution\nscheme of the elastoplastic problem containing the Mohr-Coulomb yield cri-\nterion, a nonassociative \now rule, and a nonlinear ...
Overlapping domain decomposition preconditioners for elliptic and parabolic problems in primal and mixed form
Blaheta, Radim
2017 - English
In this lecture, we concern the numerical solution of PDE problems and describe overlapping domain decomposition, which provides a tool for the construction of parallelizable Schwarz type iterative solvers and preconditioners. The idea of using overlapping domain decomposition goes back to Schwarz alternating method from 1870, see [1]. The analysis of this alternating iterative method was evolved by great mathematicians, see e.g. S.L. Sobolev (1936), R. Courant and D. Hilbert (1937), S.G. Michlin (1951), M. Práger (1958), I. Babuška (1958), F.E. Browder (1958). The use of overlapping domain decomposition for parallel computations started in the late eighties in the work of M. Dryja and O. Widlund [4], P.L. Lions [5, 6], S. Nepomnyaschikh [7] and others and continue up to the present days. The origin of the alternating Schwarz method is nicely described in [8].
Keywords:
preconditioners; Schwarz method; matrix Ma
Fulltext is available at external website.
Overlapping domain decomposition preconditioners for elliptic and parabolic problems in primal and mixed form
In this lecture, we concern the numerical solution of PDE problems and describe overlapping domain decomposition, which provides a tool for the construction of parallelizable Schwarz type iterative ...
Algebraic preconditioning for Biot-Barenblatt poroelastic systems
Blaheta, Radim; Luber, Tomáš
2017 - English
Poroelastic systems describe fluid flow through porous medium coupled with deformation of the porous matrix. In this paper, the deformation is described by linear elasticity, the fluid flow is modelled as Darcy flow. The main focus is on the Biot-Barenblatt model with double porosity/double permeability flow, which distinguishes flow in two regions considered as continua. The main goal is in proposing block diagonal preconditionings to systems arising from the discretization of the Biot-Barenblatt model by a mixed finite element method in space and implicit Euler method in time and estimating the condition number for such preconditioning. The investigation of preconditioning includes its dependence on material coefficients and parameters of discretization.
Keywords:
poroelasticity; double permeability; preconditioning; Schur complement
Fulltext is available at external website.
Algebraic preconditioning for Biot-Barenblatt poroelastic systems
Poroelastic systems describe fluid flow through porous medium coupled with deformation of the porous matrix. In this paper, the deformation is described by linear elasticity, the fluid flow is ...
Přístupy ke studiu recyklace urbánního prostoru v České republice: Vývoj a perspektiva
Osman, Robert; Malý, Jiří; Klusáček, Petr
2017 - Czech
Předkládaný příspěvek se zabývá problematikou recyklace urbánních prostor, konkrétně opuštěných a nevyužívaných prostor (brownfields) v České republice. Regenerace těchto území je důležitá především z důvodu jejich ekonomického, sociálního, kulturního, symbolického, historického a environmentálního významu. Dosavadní výzkumy recyklace urbánních prostor však do jisté míry opomíjí studium samotného procesu revitalizace. V této souvislosti lze na recyklaci prostoru nahlížet prostřednictvím konceptu sítě, konkrétně skrze teorii akté síť (A-NT). Ta umožňuje nazírání recyklace území jako mobilizaci aktérské sítě. Recyklace takto pojatého prostoru pak nutně neznamená samotnou fyzickou přestavbu území z jedné funkce využití na jinou, ale vznik nového síťového prostoru, respektive transformaci jednoho síťového prostoru v jiný. Cílem příspěvku je vyzdvihnutí hlavních přínosů A-NT při studiu recyklace prostorů. Kromě teoretických východisek pro propojení A-NT s procesem revitalizace území příspěvek nabízí konkrétní příklad regenerace území, kde aplikace A-NT rozkrývá síťovou strukturu procesu regenerace, která by dosavadními přístupy ke studiu brownfields zůstala skryta.\n This paper deals with the issue of recycling urban spaces, specifically abandoned and unused areas (brownfields) in the Czech Republic. Regeneration of these areas is important especially because of their economic, social and environmental burden. Previous researches on recycling urban space, however, neglected the study of the revitalization process to some extent. Thus, a recycling space may be seen through the concept of a network, explicitly through the Actor-network theory (A-NT).
Keywords:
recycling of urban space; brownfields; Actor-network theory; post-socialism; Czech Republic
Available in digital repository of the ASCR
Přístupy ke studiu recyklace urbánního prostoru v České republice: Vývoj a perspektiva
Předkládaný příspěvek se zabývá problematikou recyklace urbánních prostor, konkrétně opuštěných a nevyužívaných prostor (brownfields) v České republice. Regenerace těchto území je důležitá především z ...
Dynamization of spatial data using location-based services: Tourist potential of industrial heritage
Malý, Jiří; Krejčí, Tomáš; Trojan, Jakub; Chudáček, Stanislav; Nováková, Eva
2017 - English
The paper deals with industrial heritage and its potential in tourism. Although the post-industrial landscape is an integral part of all the countries that went through a period of de-industrialization and economic transformation, presentation and publicity of valuable industrial monuments that are linked with post-industrial landscape in many cases are not fully utilized. This paper aims to acquaint readers with a possibility of transformation of data on industrial objects into augmented reality, while using location-based services. The final result is the web-based platform allowing easy data transformation. The paper has thus largely methodological-application character. The outcomes of the testing phase indicate that information about the objects do have their limits, but respecting them brings their effective performance in augmented reality.
Keywords:
location-based services; augmented reality; industrial heritage; tourism; Czech Republic
Available in a digital repository NRGL
Dynamization of spatial data using location-based services: Tourist potential of industrial heritage
The paper deals with industrial heritage and its potential in tourism. Although the post-industrial landscape is an integral part of all the countries that went through a period of ...
Local geoheritage: its importance and potential for geotourist and recreational activities (a case study from Lomnicko area)
Kirchner, Karel; Kubalíková, Lucie; Bajer, A.
2017 - English
Geodiversity, respectively its valuable part – geoheritage is considered an important resource for the geotourism and recreation purposes. In the C.R., there are a lot of examples of such use of geoheritage: sandstone rock cities, karst areas or polygenetic relief at mountain areas and others. These geoheritage features are usually significant on the national level, their existence assure the attractiveness of the given area, enables the geotourist and recreational activities and support the local and regional development. However, in the local scale, the geodiversity (respectively geoheritage, represented by particular geosites and geomorphosites) can also serve the above mentioned purposes. The paper presents the example from Lomnicko area which can be seen as an “average” area from the geodiversity/geoheritage point of view on the national level, but on the local and regional level, there is a considerable number of geosites and geomorphosites with a potential for geotourism and recreation.
Keywords:
geodiversity; geosite; geomorphosite; geotourism
Available in a digital repository NRGL
Local geoheritage: its importance and potential for geotourist and recreational activities (a case study from Lomnicko area)
Geodiversity, respectively its valuable part – geoheritage is considered an important resource for the geotourism and recreation purposes. In the C.R., there are a lot of examples of such use of ...
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