Number of found documents: 1333
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The application of elastic-plastic models in estimating damage zones caused by blasting of deep tunnels
Sysala, Stanislav
2022 - Czech
The paper deals with the continuous modelling of damage zones caused by excavation of tunnels and boreholes in connection with deep repository of spent nuclear fuel in crystalline rocks. For simplicity, elastic and elastic-plastic modelling approaches based on Mohr-Coulomb or Hoek-Brown failure criteria are presented and compared. For the implementation, proper codes were created in Matlab and Python with innovative elements. Příspěvek se věnuje kontinuálnímu modelování zón poškození způsobených ražbou tunelů a vrtů v souvislosti s problematikou hlubinného ukládání vyhořelého jaderného paliva v krystalických\nhorninách. Pro jednoduchost jsou uvažovány a porovnávány pružné a pružně-plastické přístupy k modelování na základě Mohr-Coulombova nebo Hoek-Brownova kritéria poškození. Pro implementaci byly vytvořeny vlastní kódy v Matlabu a Pythonu s inovativními prvky. Keywords: stability of deep tunnels; EDZ zones; elasticity; plasticity; finite element method Available on request at various institutes of the ASCR
The application of elastic-plastic models in estimating damage zones caused by blasting of deep tunnels

The paper deals with the continuous modelling of damage zones caused by excavation of tunnels and boreholes in connection with deep repository of spent nuclear fuel in crystalline rocks. For ...

Sysala, Stanislav
Ústav geoniky, 2022

Research of geotechnical methods – Stage research report – Stage C
Staš, Lubomír; Waclawik, Petr; Souček, Kamil; Vavro, Martin; Kukutsch, Radovan; Schuchová, Kristýna; Gong, Libin; Kubina, Lukáš; Zajícová, Vendula; Nohejl, Zdeněk; Rutar, Tomáš
2021 - Czech
The main goal of project No. FV20294 (GEOSTAB) was the verification of measured geophysical quantities with data obtained by various geotechnical methods. For this reason, stage C - Research of geotechnical methods was solved in parallel and in close cooperation with stage B - Research of geophysical methods. The geotechnical experiments in situ were carried out in the same localities where geophysical methods were applied. For this purpose, several underground mining workings located in different lithological and geomechanical conditions were selected. Experimental gallery Josef was selected in volcanic rocks, the metamorphic rock mass was represented by underground workings of the former deep uranium mine Rožná and the sedimentary environment was examined in the old slate mine Modrá štola. The stage research report summarizes the results of geotechnical, laboratory and numerical methods from all the mentioned localities. Hlavním cílem projektu č. FV20294 (GEOSTAB) byla verifikace naměřených geofyzikálních veličin s daty získanými různými geotechnickými metodami. Z tohoto důvodu byla etapa C - Výzkum využití geotechnických metod, řešena paralelně a v těsné součinnosti s etapou B – Výzkum použití geofyzikálních metod. Geotechnické průzkumné experimenty in situ tak byly provedeny ve stejných lokalitách, kde byly aplikovány geofyzikální metody. Za tímto účelem bylo vybráno několik podzemních důlních děl lokalizovaných v rozdílných litologických a geomechanických podmínkách. Ve vulkanických horninách byla vybrána Experimentální štola Josef, metamorfovaný horninový masiv byl zastoupen podzemními díly bývalého hlubinného uranového dolu Rožná a sedimentární prostředí bylo zkoumáno v bývalém břidlicovém dole Modrá štola. Etapová zpráva shrnuje výsledky geotechnických, laboratorních a numerických metod ze všech uvedených lokalit. Keywords: geotechnical methods; laboratory methods; numerical simulations Available at various institutes of the ASCR
Research of geotechnical methods – Stage research report – Stage C

The main goal of project No. FV20294 (GEOSTAB) was the verification of measured geophysical quantities with data obtained by various geotechnical methods. For this reason, stage C - Research of ...

Staš, Lubomír; Waclawik, Petr; Souček, Kamil; Vavro, Martin; Kukutsch, Radovan; Schuchová, Kristýna; Gong, Libin; Kubina, Lukáš; Zajícová, Vendula; Nohejl, Zdeněk; Rutar, Tomáš
Ústav geoniky, 2021

Ecosystem monitoring in uranium ore mining and processing area of interest (ore deposit Rožná) and in the Bukovský brook creek basin in 2021
Halas, Petr; Kallabová, Eva
2021 - Czech
Periodic (annual) monitoring of ecosystems takes place on 24 areas of the Rožná deposit and on 5 comparison areas of the Bukovský brook. The effects of the uranium industry (and its accompanying activities) on biodiversity and landscape structure are identified and evaluated. Periodické (každoroční) monitorování ekosystémů probíhá na 24 plochách ložiska Rožná a na 5 srovnávacích plochách Bukovského potoka. Zjišťují a hodnotí se vlivy činnosti uranového průmyslu (a jeho doprovodných aktivit) na biodiverzitu a strukturu krajiny. Keywords: ecosystem monitoring; uranium mining; Rožná Available at various institutes of the ASCR
Ecosystem monitoring in uranium ore mining and processing area of interest (ore deposit Rožná) and in the Bukovský brook creek basin in 2021

Periodic (annual) monitoring of ecosystems takes place on 24 areas of the Rožná deposit and on 5 comparison areas of the Bukovský brook. The effects of the uranium industry (and its accompanying ...

Halas, Petr; Kallabová, Eva
Ústav geoniky, 2021

3D laser scanning of chambers BK1, BK2 of the Flascharův důl slate mine in order to design monitoring of deformation changes
Kukutsch, Radovan; Waclawik, Petr
2021 - Czech
The research report evaluates the results of 3D laser scanning of chambers BK1, BK2 of the Flascharův důl slate mine. The purpose of the scanning was to create a reference point cloud for the purpose of spatio-temporal analysis in the following years. Výzkumná zpráva hodnotí výsledky 3D laserového skenování komor BK1, BK2 břidlicového dolu Flascharův důl. Účelem skenování bylo vytvoření referenčního mračna bodů pro účely časoprostorové analýzy v následujících létech. Keywords: 3D laser scanning; TLS; slate mine Available on request at various institutes of the ASCR
3D laser scanning of chambers BK1, BK2 of the Flascharův důl slate mine in order to design monitoring of deformation changes

The research report evaluates the results of 3D laser scanning of chambers BK1, BK2 of the Flascharův důl slate mine. The purpose of the scanning was to create a reference point cloud for the purpose ...

Kukutsch, Radovan; Waclawik, Petr
Ústav geoniky, 2021

Seismic loading of Jeroným Mine near Čistá in 2021 and chamber K1 stability observing
Kaláb, Zdeněk; Rösnerová, Markéta; Kaláb, Tomáš
2021 - Czech
This research report describes results of seismological monitorning in the Jeroným Mine near Čistá in 2021. Main results from monitoring of geotechnical parameters using distributed measurement system are briefly presented, namely stability of chamber K1 and movement of mine water level in long time period. The measurement of radon volume activity is briefly described. The fall down of rock in October 2021 is also mentioned. Výzkumná zpráva popisuje výsledky seismologického monitoringu v Dole Jeroným v Čisté v roce 2021. Stručně jsou komentovány také hlavní výsledky monitorování geotechnických parametrů v podzemních prostorách pomocí distribuovaného měřicího systému, jmenovitě stabilita komory K1 a pohyb hladiny důlních vod v delším časovém období. Stručně je popsáno měření objemové aktivity radonu a opad horniny v říjnu 2021. Keywords: seismic loading; distributed measurement system; mining water; Jeroným Mine Available on request at various institutes of the ASCR
Seismic loading of Jeroným Mine near Čistá in 2021 and chamber K1 stability observing

This research report describes results of seismological monitorning in the Jeroným Mine near Čistá in 2021. Main results from monitoring of geotechnical parameters using distributed measurement system ...

Kaláb, Zdeněk; Rösnerová, Markéta; Kaláb, Tomáš
Ústav geoniky, 2021

Structural mapping of exploration geotechnical boreholes walls within 1st phase – Ore Zone
Waclawik, Petr; Vavro, Martin; Schuchová, Kristýna; Kukutsch, Radovan; Staš, Lubomír; Souček, Kamil; Georgiou, Lucie
2021 - English
Structural-geological analysis, i.e. fracturing assessment of the walls of geotechnical boreholes (CIS12, CIS14, CIS31 and CIS37) within the Ore Zone lithium exploratory area was carried out on the basis of optical (OPTV) and acoustic televiewer (HiRAT) records evaluation. HiRAT and OPTV probes are part of the Robertson Geologging logging equipment. The apparatus has an electric winch with a four-core logging cable, which transmits the data recorded by the probes via a data logger to a computer. The spatial data obtained from interpretation of the geotechnical boreholes records were structurally analysed. The submitted research report comprehensively summarises the findings obtained from the structural mapping of geotechnical boreholes. On the basis measured data the rock mass quality evaluation of boreholes walls were additionally done. The complex data have been allowed very precise analysis of rock mass structural conditions, which are necessary for construction geomechanical model. Keywords: geotechnical boreholes; structural mapping; rock mass quality Available at various institutes of the ASCR
Structural mapping of exploration geotechnical boreholes walls within 1st phase – Ore Zone

Structural-geological analysis, i.e. fracturing assessment of the walls of geotechnical boreholes (CIS12, CIS14, CIS31 and CIS37) within the Ore Zone lithium exploratory area was carried out on the ...

Waclawik, Petr; Vavro, Martin; Schuchová, Kristýna; Kukutsch, Radovan; Staš, Lubomír; Souček, Kamil; Georgiou, Lucie
Ústav geoniky, 2021

Convergence measurement of the vent shaft on the 3rd floor during the mining of coalface No. 292 200/4
Koníček, Petr; Kajzar, Vlastimil; Kukutsch, Radovan; Staš, Lubomír
2021 - Czech
On the basis of a contract, the Institute of Geonics of the CAS realized repeated convergence measurement of selected part of the mining roads and appropriate part of vent shaft on the 3rd floor in the vicinity of the ČSM Sever vent shaft. The main reason was to capture spatio-temporal and dynamic changes in relation to the mining of the coalface No. 200 200/4. A section of the embankment of the 3rd floor of the vent shaft was selected for the convergence measurement. The work can be divided into 3 separate tasks - terrestrial laser scanning of the vent shaft from level of the 3rd floor, pilot laser scanning of the vent shaft from the skip elevator and evaluation of seismological activity registered during the mining of the coalface No. 292 200/4. Na základě uzavřené smlouvy o dílo realizoval Ústav geoniky AV ČR, v.v.i. opakované zaměření konvergencí vybrané části překopu na 3. patře v okolí výdušné jámy ČSM Sever za účelem zachycení časoprostorových a dynamických změn v souvislosti s dobývání porubu 292 200/4. Pro měření konvergencí byl vybrán úsek náraží 3. patra výdušné jámy. Práce na díle je možné rozdělit 3 samostatné části - pozemní laserové skenování výdušné jámy z úrovně 3. patra, pilotní laserové skenování výdušné jámy z podvěsu skipové nádoby a hodnocení seizmologické aktivity registrované při dobývání porubu 292 200/4. Keywords: convergence measurement; spatio-temporal and dynamic changes; laser scanning; evaluation of seismological activity Available at various institutes of the ASCR
Convergence measurement of the vent shaft on the 3rd floor during the mining of coalface No. 292 200/4

On the basis of a contract, the Institute of Geonics of the CAS realized repeated convergence measurement of selected part of the mining roads and appropriate part of vent shaft on the 3rd floor in ...

Koníček, Petr; Kajzar, Vlastimil; Kukutsch, Radovan; Staš, Lubomír
Ústav geoniky, 2021

Convergence measurement of CSM Sever vent shaft and adjacent surroundings on 3rd floor using 3D terrestrial laser scaner technology
Kajzar, Vlastimil; Koníček, Petr
2021 - Czech
On the basis of a contract, the Institute of Geonics of the CAS realized repeated convergence measurement of selected part of the mining roads and appropriate part of vent shaft on the 3rd floor in the vicinity of the CSM Sever vent shaft. The main reason was to capture spatio-temporal and dynamic changes in relation to the mining of the coalface No. 292 200/4. A section of the embankment of the 3rd floor of the vent shaft was selected for the convergence measurement.\nThe subject of the use of terrestrial laser scanning technology was to capture the current spatial situation of the vent pit on the 3rd floor of the CSM Sever mine and its adjacent surroundings. The wider area around the shaft and the part of the vent shaft directly visible from the level of the galleries of the 3rd floor were scanned. The scanning was performed using a Leica ScanStation C10 laser scanner. The rescanning was performed using a FARO Focus S350 laser scanner. Na základě smlouvy o dílo realizoval Ústav geoniky AV ČR, v.v.i. opakované zaměření konvergencí vybrané části překopu na 3. patře v okolí výdušné jámy ČSM Sever za účelem zachycení časoprostorových a dynamických změn v souvislosti s dobývání porubu 292 200/4. Pro měření konvergencí byl vybrán úsek náraží 3. patra výdušné jámy.\nPředmětem nasazení technologie pozemního laserového skenování bylo zachycení aktuální prostorové situace výdušné jámy na 3. patře dolu ČSM Sever a jejího přilehlého okolí. Skenován byl širší prostor okolí jámy a část výdušné jámy přímo viditelná z úrovně ochozů 3. patra. Skenování bylo realizováno pomocí pozemního laserového skeneru Leica ScanStation C10. Opakované skenování bylo provedeno pomocí pozemního laserového skeneru FARO Focus S350. Keywords: convergence measurement; spatio-temporal and dynamic changes; vent pit; 3D terrestrial laser scaner Available at various institutes of the ASCR
Convergence measurement of CSM Sever vent shaft and adjacent surroundings on 3rd floor using 3D terrestrial laser scaner technology

On the basis of a contract, the Institute of Geonics of the CAS realized repeated convergence measurement of selected part of the mining roads and appropriate part of vent shaft on the 3rd floor in ...

Kajzar, Vlastimil; Koníček, Petr
Ústav geoniky, 2021

Polycentric urban forms: The relevance of scale for metropolitan and city planning
Malý, Jiří; Krejčí, Tomáš
2021 - English
The paper deals with the importance of scale in metropolitan and urban planning, in connection with the promoted and often applied concept of polycentric development. Although the normative conceptualization of polycentricity to some extent reflects the multi-scalar dimension, the operationalization of the concept encounters a number of limitations and fuzzy meanings that result from different scales of analysis and interpretation. Using the Czech context of planning practice, the negligence of the importance of overlapping geographical scales and limits of binding spatial planning materials is documented. The dependence of polycentricity on the scale has consequences both for the analytical evaluation of the spatial situation of the settlement system and for the subsequent interpretation of the results and the setting of further development strategies.\n Keywords: polycentricity; scale; metropolitan planning; urban planning Fulltext is available at external website.
Polycentric urban forms: The relevance of scale for metropolitan and city planning

The paper deals with the importance of scale in metropolitan and urban planning, in connection with the promoted and often applied concept of polycentric development. Although the normative ...

Malý, Jiří; Krejčí, Tomáš
Ústav geoniky, 2021

RTIN-based strategies for local mesh refinement
Kolcun, Alexej; Sysala, Stanislav
2021 - English
Longest-edge bisection algorithms are often used for local mesh refinements within the finite element method in 2D. In this paper, we discuss and describe their conforming variant. A particular attention is devoted to the so-called Right-Triangulated Irregular Network (RTIN) based on isosceles right triangles and its tranformation to more general domains. We suggest to combine RTIN with a balanced quadrant tree (QuadTree) decomposition. This combination does not produce hanging nodes within the mesh refinements and could be extended to tetrahedral meshes in 3D. Keywords: mesh refinement; longest-edge bisection; right-triangulated irregular network; balanced quadrant tree; homomorphic transformation Available on request at various institutes of the ASCR
RTIN-based strategies for local mesh refinement

Longest-edge bisection algorithms are often used for local mesh refinements within the finite element method in 2D. In this paper, we discuss and describe their conforming variant. A particular ...

Kolcun, Alexej; Sysala, Stanislav
Ústav geoniky, 2021

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