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Observation of phases of surface changes above exploited deposits of sedimentary type
Kajzar, Vlastimil ; Doležalová, Hana ; Staš, Lubomír ; Souček, Kamil ; Šimkovičová, Jarmila
Due to exploitation of coal and other raw materials of sedimentary type there happen many surface changes connected mostly with subsidence, shifts and deformations of the area of interest. Such processes happen mainly in the overlaying strata of exploited coalface. Size and directions of these movements and deformations depend generally on many factors, primarily on geo-mechanical properties of overlaying strata and general technique of exploitation of the deposit. One of the ways of surface observation of time spatial changes is the usage of modern methods for precise determination of changing position of geo-features. Among these methods we rank GPS surveying and usage of methods for gaining data from aerial photogrammetry. Subsequent processing, analysis and modelling of output data by means of modern GIS software offer an efficient source of information for subsequent work and decisions.
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Změny horninového masívu v blízkosti okraje poklesové kotliny
Doležalová, Hana
Repeated geodetic and geophysical surveying near the margin of a creating subsidence depression has shown on a fluctuation of heights of levelled points and on significant rock massif changes. The possible cause of these changes may be found not only in progressive stress-deformational changes due to undermining but also in the changing regime of the groundwater. Confrontation of the levelled height changes with the height of the groundwater level shows that the regime of the groundwater may be a substantial cause of surface height changes. Also the resistivity anomalies found by geophysical measurements can be caused by change of hydro-geological regime.
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Stating the point´s height by levelling
Doležalová, Hana
Earth´s shape is too difficult for geodesy, that´s why we choose different planes of reference. To find out point´s height means to define a plane of reference and to state vertical distance between the plane and the point, it can be done with levelling.
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Problems of motions and deformations at the undermined territory
Doležalová, Hana
Underground mining leads to creation of subsidence depression. In the contribution measuring of motions and deformation using GPS technology is presented. Surveying on the geodetic points of the subsidence depression usually has to be done on a large area in a short time. That's why we use GPS mesuring, but also this has to be adapted to the changing surface of the undermined territory. The point coordinates are then used to compute the size and direction of motions and deformations that happen in the subsidence depression.
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Complex geodetic and geophysical measuring in the subsidence depression
Doležalová, Hana ; Kaláb, Zdeněk ; Müller, Karel
The usage of geodetic and geophysical methods to measure at the undermined territory is described in the contribution. Beside geodetic methods that are used in the subsidence depression to find out both motions and deformations of the surface and buildings there's also presented the suitability to use geophysical methods in the mining area. The principles of seismologic measurements to review buildings exposure are described too, as the observation of influences of underground mining on buildings is very useful.
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Business Management and Taxes
Plačková, Lenka ; Dvořák, Jiří (advisor) ; Doležalová, Hana (referee)
The diploma thesis describes firstly a tax system in the Czech Republic from the theoretical point of view, secondly it describes an influence which it has on constractors (self employers), natural persons and also on legal entities. I have chosen a factual company on which I analyse the difference between the tax liability in the years 2007 and 2008, separatly on a value added tax (VAT), on a corporate income tax and on a tax all-in cost of the employees. To conclude, I mention a total incidence of taxes on surveyed companies and I evaluate its influence in the years 2007 and 2008.
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