2011, Volume LVII, Issue No.4, ISSN 1802-5420
  • An Eco-Hydrological Assessment of a Watercourse Examplified by a Case Study

    Jana Nováková, Iva Melčáková

    A small stream and its alluvial plain is an important component of a landscape. The mapping of actual condition of the stream basin and the proposal of its restoration study took place in the area of the Vařešinka stream basin. Monitoring and analyzing the selected parameters for a hydro-ecological evaluation is a useful basis for working out the System of Ecological Stability of the Landscape (USES) as a part of the municipal plan of the town of Hlučín.

  • Comparison of Costs of Rehabilitation Works on Central Mine Waste Bank of Jan Šverma Mine in Žacléř

    Lucie Krčmarská, Hana Růčková, Kristýna Černá, Václav Dorazil

    This article pays particular attention to the evaluation of costs associated with the rehabilitation of the Central Mine Waste Bank of the Jan Šverma Mine in individual years. It mentions briefly the present state of the Central Mine Waste Bank and describes in short the works performed so far on the mine waste bank. Furthermore, the article describes specific types of rehabilitation; the description of partial operations is provided as well. The above-mentioned costs are quantified in a tabular summary for the years 2008 – 2011. These works were ordered by the Ministry of Industry and Trade through the state enterprise Fuel Combine Ústí nad Labem, which had absorbed the former state enterprise East Bohemian Coal Mines in Trutnov [1].

  • Hydrogeologic and Hydraulic Conditions of Old Mine Workings of the Former Jeroným Mine

    Arnošt Grmela, Petr Žůrek, Radovan Kukutsch, Robert Kořínek

    The Jeroným Mine, situated in the locality of the Slavkovský les Protected Landscape Area, is a unique heritage site associated with mining in the 15th and 16th centuries. To make this mine working accessible to the public, it is necessary in the first place to stabilize underground voids and to ensure such internal microclimatic conditions so that any degradation of the mine working and any hazard to workers performing restoration operations and later to visitors will not occur. The contribution deals with the factors conditioning and affecting the stability of this system of mine workings.

  • Application of GRP During Investigation Concerning Causes of Failure of Railway Station Platform in Jilešovice

    Pavel Pospíšil, Aleš Poláček, Luděk Kovář

    Civil engineering works carried out as the renovation of existing buildings can be difficult to predict in terms of their behaviour over time. The heterogeneity of materials of a natural and anthropogenic origin can subsequently lead to either deformations, or breach threatening the existence of building structure in terms of statics. The platform of the station in Jilešovice underwent structural modifications within the reconstruction of the railway track from Ostrava to Opava. The largest building intervention was the reconstruction of an old bridge and adjacent embankment bodies now in addition secured due to stability by gabion baskets instead of the original natural grading. After a short time of its use, significant deformations appeared on the renovated object, whose causes and further evolution over time was not known. Within the design of investigation techniques, allowing uncovering the causes of violation quickly and efficiently, the survey with a georadar -GPR (Ground Penetrating Radar) was included, which as an indirect, non-destructive method of survey very quickly helped to clarify the causes of violations of the building structures.

  • Transformation of Thematic Cartography Domain Ontology into Java Interfaces and Clasess

    Tomáš Peňáz, Radek Dostál

    The article deals with the transformation of an experimental ontology, concentrating selected declarative knowledge for the domain of thematic cartography, into classes and interfaces of the Java language. The reason for this transformation is to transfer the declarative knowledge from the field of thematic cartography into the form of a program code in the Java programming language. The resulting program code containing declarations of interfaces and classes will be further used for the development of a software application for an intelligent system for the interactive support of thematic map design. The upcoming pilot project of this knowledge system is designed for the users without necessary cartographic knowledge, which will allow them to create interactively thematic maps and provide them with the support. The purpose of the use of such a tool is to prevent the users from deviating from established cartographic rules and avoid the occurrence of blunders in resulting maps.A properly compiled knowledge ontology facilitates the design of the prepared intelligent cartographic application, as the use of cartographic knowledge is enabled based on the automated transformation into the program code in the Java language. The generated program code contains declarations of basic concepts of thematic cartography, their structuring into classes corresponding to the source structures described in the ontology. The code also contains descriptions vertical and horizontal relations between the declared classes and also the interface for access to these classes and relations. The automated transformation of ontology into the Java code is not completely lossless. The examples of a transformation of individual components of ontology (classes, individuals, and object and datatype properties) into Java interfaces and classes show the differences occurred during the transfer of the declarative knowledge into the program code. From these examples it is clear that the elements of ontology component description are or are not transformed into the Java code in full. The article proposes recommendations how to optimize the knowledge description on the part of ontology in order to minimize possible losses of the transformation of knowledge into the Java code.

  • Research of Employee Benefits in the Ostrava Region

    Michal Vaněk, Lucie Krčmarská, Jana Magnusková, Lucie Kučerová, Michaela Bartošíková

    The article deals with the issues of employee benefits that influence employee motivation. Thus they participate not only in creating preconditions for company competitiveness, but also in proper running the company and/or return on investments into employees. In relation to the given questions, selected motivation theories and results of some sociological surveys connected with these problems are characterised briefly in the article as well. The focus of the article is the research into employee benefits in the Ostrava region. The authors of the article paid particular attention to the kinds of benefits provided to employees most frequently at present and how these benefits are perceived by employees themselves.

2011, Volume LVII, Issue No.3, ISSN 1802-5420
  • Agricultural Residues from Pyrolysis and their Application in Flotation

    Peter Fečko, Jaroslav Zima, Zdeňka Wittlingerová

    The paper deals with verification of floatability of a classical collector Montanol 551 and pyrolysis oils that were formed through pyrolysis of agricultural residues from basic industry and used in the flotation of black coal. The results imply that it is possible to produce collectors also from waste agricultural products, which may be applicable in the flotation of black coal.

  • Application of Robust Estimation Methods for the Analysis of Outlier Measurements

    Silvia Gašincová, Juraj Gašinec, Gabriel Weiss, Slavomír Labant

    The basis of mathematical analysis of geodetic measurements is the method of least squares (LSM), whose bicentenary we celebrated in 2006. In geodetic practice, we quite often encounter the phenomenon when outlier measurements penetrate into the set of measured data as a result of e.g. the impact of physical environment. That fact led to modifications of LSM that have been increasingly published mainly in foreign literature in recent years. The mentioned alternative estimation methods are e.g. robust estimation methods and methods in linear programming. the aim of the present paper is to compare LSM with the robust estimation methods on an example of a regression line.

  • Novel Technique of Active Biomonitoring Introduced in the Czech Republic: Bioaccumulation of Atmospheric Trace Metals in Two Moss Species

    Oldřich Motyka, Barbora Macečková, Jana Seidlerová, Blanka Krejčí

    A biomonitoring technique never before used in the Czech Republic was used to test its validity and applicability in the region of Ostrava that is eminently affected by industry. Transplants of two moss species Hylocomium splendens and Pleurozium schreberi were exposed to atmospheric pollution using the technique of an “irrigated moss bag” placed at a height of both 1 m and 2 m above ground. The samples were then analysed for concentration levels of trace elements Al, As, Cd, Cr, Cu, Fe, Hg, Pb, V and Zn. The patterns of bioaccumulation in general show that Hylocomium splendens is more suitable for monitoring purposes and that 2 m height above ground of transplants should be preferred.

  • Methodological Problems of Assessing Spatial and Temporal Changes in the Quality of Mine Water

    Naďa Rapantová, Arnošt Grmela

    An important, but largely neglected hydrogeological issue is the timing of mine water sampling during mining and after mine closure. Significant temporal and spatial changes in the “ageing“ of information, neglected effects of dynamic changes in the quality of mine water and its resources are causing severe degradation of information from mine water analyses and their possible misleading interpretation. Hydrogeological data are typical examples of multi-parametric information and if any hydrogeochemical data bases and their further processing are to be undertaken it is advisable to use methods of multi-parametric analyses followed by hydrogeochemical reaction models. Another limiting factor affecting the validity of results is the assessment of the issue of the representativeness of samples. The methodology applied on various mining sites is widely discussed in the paper.

  • Searching for Old Mine Workings Through the Use of Handheld GNSS Receivers

    Jitka Mučková

    Old mine workings situated in a landscape pose a very serious problem from the point of view of people security and property protection. For that reason it is necessary to look for these mine workings and liquidate them. The use of handheld GNSS receivers is one of alternative methods of searching for old mine workings. The accuracy of handheld GNSS receives does not reach the level of accuracy of geodetic apparatuses, but it is sufficient for the purpose of searching for locations of old mine workings as is clear from the considerations given in this article. The test was performed at points of fundamental geodetic control.

  • Problems of Cooling Sealed Fire Areas in Underground Coal Mines

    Jana Magnusková, Simona Matušková Jana Bartoňová, Zdeněk Pavelek

    In current mining practice, the most often used methods of cooling spatially sealed fire areas are: natural cooling, cooling by nitrogen, cooling by water and inert foam and cooling by combustion product recirculation. The technology of cooling with nitrogen represents two variants - the use of liquid nitrogen or nitrogen gas in the area of closed mine workings. From a technical and safety points of view the application of liquid nitrogen is today considered unsatisfactory, while the use of nitrogen gas seams to be highly safe technology for cooling explosion-proof sealed fire areas. Another possibility for cooling fire areas in deep coal mines is so-called natural cooling, where economical costs are indeed zero, but comparing to cooling processes induced by the application of cooling technologies a longer time period necessary for the natural refrigeration of fire areas causes financial losses.

  • Shifts of Trigonometric Points in the Area Affected by Mining Activities

    Marek Mikoláš, Milan Mikoláš, Petra Zápalková

    In the underground mining of deposits, except the subsidence of layers also a horizontal shift occurs. The shift of trigonometric points is detected by the renewal of network. Formerly, the new triangulation of the overall area of interest has been carried out and since 1991 with the onset of modern observation techniques the GNSS technology has been used in full, which is not so time-consuming and economically demanding as triangulation works.

  • Comparison of Tacheometry and Laser Scanning Methods for Measuring the Quarry in Jakubčovice nad Odrou

    Petra Zápalková, Václav Smítka, Milan Mikoláš

    The presented this method is more efficient for surveying a site. Part of this is the calculation of the volumes of excavated muck using 3D models and their comparison. The comparison of the measurements of part of the quarry in Jakubčovice nad Odrou using the tacheometry and laser scanning techniques was performed. The final assessment was in favour of the laser scanning method which provides capturing the entire object surface with a chosen level of detail compared to the tacheometry method, in which only characteristic points of the measured object, such as edges, are captured.

2011, Volume LVII, Issue No.2, ISSN 1802-5420
  • Considerations Concerning the Stream of Heat Transferred from Rock Mass into Mine Ventilation Air and the Utilization of this Heat By Means of Air Cooling Installations

    Józef Knechtel

    This paper deals with the feasibility of utilization of the heat carried away with the air stream ventilating a mine after closing down mining operations. the problem is that, although the temperature of air flowing underground is rather high (above 35oC), the air temperature at the surface level drops to about 25oC. For that reason it was proposed to cool down the hot air underground and to transport the hot water from cooling machines to the surface level. However, such a solution is not realistic in closed-down mines. So, another idea was considered consisting in exploiting the thermal energy of the exhaust air stream in functioning mines. Further the cooling potential of Polish mines was surveyed. It emerged that for the mines with an active cooling potential in the range of a couple of MW it can be economically viable to transfer the gained thermal energy released due to surface condensation and to use that energy for communal heating.

  • the Regulation of Ventilation by Changing the Operation of the Main Fan and its Impact on the Face Worked under the Main Haulage Level

    Pavel Zapletal, Pavel Prokop, Václav Dorazil

    The regulation of mine ventilation by changing the operation of the main fan (HV) has both positive and negative aspects. One of the positive aspects is that this regulation can be made directly on the mine surface without lowering into the mine, namely by turning the fan blades from the minimum to maximum position. This regulation can be performed either from the control room or directly at the fan. The utilization of this control method in the mine ventilation (the reducing or increasing of the depression of main fans) brings with also certain disadvantages. By the overall regulation of the depression of main fans we influence the overall mine ventilation network. The HV regulation can without further interventions cause problems in other part of the mine. therefore, to eliminate the negative effects we have to do partial steps in the regulation of ventilation in the ventilation network to achieve the desired effect in a specific part of the mining field and prevent the unwanted effect in other parts of the ventilation network. In this article we deal with the negative effects on a face worked under the main haulage level.

  • Mining of Coal Seams under the Main Haulage Level

    Josef Chovanec, Petr Urban , Ivo Pěgřímek, Vitězslav Košnovský

    The question of mining under the main haulage level as a way by which in some cases coal reserves can be effectively extracted is still discussed. the paper introduces advantages and disadvantages of this method. It presents examples of the bedding of a seam in a limited depth under level, for example 50 m, when the opening by the under level mining method is obviously more advantageous. Special attention is given to risks of ventilation short circuit which are higher in this method compared to classical opening. The paper also gives a brief economical reflection allowing to determine the efficiency of under level mining.

  • Geotouristic Product – Saline Solutions of Dębieńsko

    Katarzyna Tobór-Osadnik, Małgorzata Wyganowska

    New business lines, as well as a new approach to local natural resources, are development opportunities for post-mining regions. The authors characterize brine produced by Dębieńsko Desalting Plant in Czerwionka Leszczyny (Silesia District) in Poland as a commodity. Compared to neighbouring districts in the region, Czerwionka Leszczyny is rich in numerous examples of animated and inanimate nature as well as a few historical monuments. Nevertheless it is not a popular tourist destination for native or foreign tourists. therefore, it is vital to seek a commodity which would be the region’s competitive advantage and boost tourist infrastructure. According to the authors, medically beneficial brine which is a Dębieńsko Desalting Plant by-product, could become that commodity.

  • Controlling Claims and Liabilities and its Use for Identification Of Bankruptcy

    Michaela Sternadelová

    The article deals with controlling claims and liabilities, explains the concepts and principles used in practice. It also puts forward how the company's claims can be monitored according to time perspective as well as selected indicators of financial analysis. Following the example of a selected company in bankruptcy it shows how to apply methods for monitoring claims while tracking the structure of corporate liabilities. By analysing the balance sheet and notes to the financial statements the company's bankruptcy is identified.

2011, Volume LVII, Issue No.1, ISSN 1802-5420
  • Impacts of Measuring and Numerical Errors In Lsm Adjustment of Local Geodetic Network

    Silvia Gašincová, Dušan Knežo, Ladislav Mixtaj, Peter Harman

    The Local Geodetic Network (LGN) adjustment is affected by various errors, whether arisen from measuring or calculating works. the measuring errors occurred in the consistent LGS measuring can be detected by control calculations in using redundant measurements. The numerical errors may be detected, or the accuracy of the formulas used can be verified by control calculations in a configuration matrix and control relations, which should show zero values.

  • Reflotation of Coal Flotation Tailings Using Foam Separation

    Hana Juřicová, František Tichánek

    Froth separation is one of the new methods of flotation process in mineral treatment. This method allows a substantial increase in the size upper limit of separated grains. The contribution deals with the verification of the possibility of using the froth separation for retreatment of flotation tailings. For laboratory research samples of flotation tailings from the Paskov Mine treatment complex were used. The results confirmed the ability of froth separation to convert coarse coal grains into a concentrate. Grains with a grain size of 0.5 mm were successfully reflotated.

  • Use of the Method of Net Present Value in Bankruptcy Proceedings of Industrial Enterprises

    Michaela Sternadelová

    One of the possible solutions to the debtor's bankruptcy provided by the Insolvency Act is to use the institute of reorganization. According to the Insolvency Act the reorganization is defined as the gradual satisfaction of creditors' claims, while preserving the debtor's business. The permission of reorganization of the debtor's business is subject to the preparation of a reorganization plan describing all measures to be taken, in order to reorganize the debtor's business. The article deals with the processing and quantification of measures to reorganize the business operations. It analyses the data recorded on found out investment costs, operating costs and revenues, using net present value methods, the profitability index and payback period to assess the proposed project. It assesses, whether the revenues from the proposed investment are sufficient, and ensure adequate satisfaction of the creditors.

  • Evaluation of Externalities in the Long-Time Influenced Mining Area in Orlová - Poruba

    Jana Polanská, Eva Lacková, Barbara Stalmachová

    One of the possible solutions to the debtor's bankruptcy provided by the Insolvency Act is to use the institute of reorganization. According to the Insolvency Act the reorganization is defined as the gradual satisfaction of creditors' claims, while preserving the debtor's business. The permission of reorganization of the debtor's business is subject to the preparation of a reorganization plan describing all measures to be taken, in order to reorganize the debtor's business. The article deals with the processing and quantification of measures to reorganize the business operations. It analyses the data recorded on found out investment costs, operating costs and revenues, using net present value methods, the profitability index and payback period to assess the proposed project. It assesses, whether the revenues from the proposed investment are sufficient, and ensure adequate satisfaction of the creditors.