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Bednarova P.,VSTE Institute of Technology and Business in Ceske Budejovice | Marschalko M.,VSB - Technical University of Ostrava | Vlcek J.,University of Zilina | Kubecka K.,VSTE Institute of Technology and Business in Ceske Budejovice | Bulko R.,University of Zilina
International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM | Year: 2015

The actual trends in geotechnical engineering, concerning assessment of geotechnical problems by numerical analysis by Plaxis, Flac, ZSoil, Abaqus, Crisp or Midas require adequate input settings, values, parameters. In addition to sophisticated laboratory procedures, the main reason to support the use of field testing is continuous characterization of the testing profile, immediate evaluation of the characteristics and type of soil and determination of geotechnical parameters needed for constitutive models of soils. Conventional surveying methods like core boring with sample extraction for laboratory tests can offer only limited point information about rock environment. In geological environments with clayey and silty soils the most common in-situ testing methods are static penetration test CPTm, CPTu with piezocone, and seismic cone SCPT. Estimation of soil properties based on results of the penetration tests is reliable only if the probe is made with provided boreholes, supplemented by laboratory tests. Sample data from CPT examination of foundation conditions along the route R1 Nitra, west - Beladice - Tekovské Nemce are presented to show the calculation of parameters for advanced constitutive models of soils. © SGEM2015. Source


Bednarova P.,VSTE Institute of Technology and Business in Ceske Budejovice | Marschalko M.,VSB - Technical University of Ostrava | Niemiec D.,VSB - Technical University of Ostrava | Kubecka K.,VSTE Institute of Technology and Business in Ceske Budejovice | Duda R.,AGH University of Science and Technology
International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM | Year: 2015

From the viewpoint of engineering geology and geotechnical engineering, the most important aspect is the state of geological subsoil, which influences various geological hazards. Geofactors are the basic components of the geological environment, which influence on the realization of foundation engineering. In the implementation of engineering work can find a wide variety of problems and complications. The factors that enter into this process and their combinations are endless and cannot describe all the way. Therefore nine geofactors was compiled, which include the most common problems in the implementation of engineering work, when deciding on a suitable location for engineering work, but also the issues of existing engineering works. The assessment of engineering geological conditions, which are used for the evaluation of foundation soils and their interaction with the engineering works are very complicated. The geological environment is closely related to other factors that fundamentally influence its behaviour. The practicality of this scheme lies in its simplicity, which allows quick entry into information about the risks arising from individual geofactors. The aim of this publication is to analyze those geofactors and structuring of hierarchies their effects. © SGEM2015. Source


Lamich D.,VSTE Institute of Technology and Business in Ceske Budejovice | Marschalko M.,VSB - Technical University of Ostrava | Yilmaz I.,Cumhuriyet University | Bednarova P.,VSTE Institute of Technology and Business in Ceske Budejovice | And 3 more authors.
Environmental Earth Sciences | Year: 2016

This paper presents a study of 12-year monitoring of ground subsidence along a selected road affected by subsidences trough induced by underground black coal mining in the largest mining district in the Czech Republic. The major scientific contribution of this study is that it suggests a new methodology that involves independent observation of a subsidence trough in the linear direction (a road), permitting determination of the ground deformation parameters and related building site categories. In areas affected by deep coal mining, it is vital to update the current status of the building site categories, which represent the zones of potential hazard posed to the existing structures or future development. It is possible to identify the actual conditions in the localities using systematical measurements along roads which are in any case required for periodical maintenance in areas of underground mining. Prognoses may be subsequently optimised in this way and investors, property owners and mining companies may benefit through saving on costs associated with subsidence damage. In fact, there are two eventualities, i.e., the conditions either improve or deteriorate. The latter occurred in the case of the study area. In the beginning, the majority of the study area, i.e., 91 %, belonged to the most suitable category of building sites, which means that development was possible without any restrictions. At the end of the observation, the measurements showed a prominent fall of the subsidence trough, and as much as 19 % of the area fell into the least suitable categories I or II, where development is prohibited. The publication recommends that mining companies use road monitoring as an independent monitoring tool to determine the hazard in regions affected by deep coal mining. It is possible to conveniently verify the prognostic maps in land use planning in this way. © 2015, Springer-Verlag Berlin Heidelberg. Source


Lamich D.,VSTE Institute of Technology and Business in Ceske Budejovice | Marschalko M.,VSB - Technical University of Ostrava | Yilmaz I.,Cumhuriyet University | Bednarova P.,VSTE Institute of Technology and Business in Ceske Budejovice | And 4 more authors.
Environmental Earth Sciences | Year: 2016

This article studies a set of historical churches influenced by subsidence induced by underground coal mining in the Karvina part of the Upper Silesian Coal Basin in the Czech Republic. The research made use of engineering geological tools to assess the influence of underground mining on the ground. In the cases of the churches in question, variations in time of the existing subsidence have also been evaluated. The herein applied method in determination of the building site categories transforms the measured (macroscopically) visible vertical tilts of buildings (churches) into horizontal tilts and it is new. Horizontal tilts are important characteristics expressing differential settlement. However, these are not measurable as the building begins in the foundation soil and the foundations would have to be exposed. Building site categories, i.e. categories of hazard to determine the mining influence on buildings, based on horizontal tilt were used to determine the influence of underground mining onto a building. Due to the fact that the churches under observation find themselves at diverse stages of subsidence, we identified a great variability of subsidence and building site categories. This way, the churches become unique landmarks in the cultivated landscape as they frequently remain the only historical buildings in the subsidence trough. Thanks to rehabilitation and repeated repairs churches survive as the memorials of human life in subsidence troughs induced by underground coal mining. For example, in the Ostrava-Karvina Coal District coal has been mined for 200 years. The fundamental argument for the nomination of the church set onto the UNESCO World Heritage List is the fact that historical churches may remain the only traces left by people living in localities affected by underground coal mining. The article would also like to point at the application of engineering geology for other than construction or environmental purposes. Geo-tourism has this scientific and economic potential for the future. © 2015, Springer-Verlag Berlin Heidelberg. Source


Bednarova P.,VSTE Institute of Technology and Business in Ceske Budejovice | Marschalko M.,VSB - Technical University of Ostrava | Zasterova P.,VSTE Institute of Technology and Business in Ceske Budejovice | Kubecka K.,VSTE Institute of Technology and Business in Ceske Budejovice | Durd'ak J.,VSTE Institute of Technology and Business in Ceske Budejovice
International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM | Year: 2015

Knowledge material composition coal waste dump is a necessary condition of their subsequent utilizations. Knowledge this fact gives a first prerequisite for possible mining and processing materials of coal waste dumps and their possible use as secondary construction materials. Coal mine dumps are specific geological environment which in its volume is relatively homogeneous. Intensive mining in the Ostrava-Karvina coal district left behind a lot of coal waste dumps. Coal waste dumps composite entirely of gangue material are very numerous (around 46). Heap of Ostrava-Karviná coal district have a specific character resulting from hard coal mining in Upper Silesian Coal Basin. Knowledge of the composition and behaviour of the material from coal waste dumps allow you to select the most optimal utilization of affected areas. Although their number is gradually decreases it is still a large area, which needs to continue to study. The basis for understanding the material composition of these coal waste dumps, there is an analysis of the material and also a schematic cross section of Ostrava-Karviná coal district. The aim of this publication is to analyze the character material. © SGEM2015. Source

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