Browsing by Subject "lignite mining"

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Access status: Open Access ,
Analiza parametrów metody dyskontowej przy ocenie inwestycji na złożu węgla brunatnego
(Wydawnictwa AGH, 2010) Czopek, Kazimierz
This article presents an example of a procedure for economic estimation of exploitation of a new deposit. This paper is concerned with a way of assigning of the scope of a decisional variable in the NPV (Net Present Value) formula. This article also takes into consideration the specific of lignite mining in cash flow calculation, taking into account instead of operating costs, the unit costs of mass exploitation. The discount method was used for the economic estimation of efficiency of exploitation of a new lignite deposits. After taking into account the mentioned lignite specific there are nine parameters in formula of NPV of a different nature; deterministic and probabilistic. These parameters include; investment expenses It, discount rate r, investment evaluation period t, number of years of the investment cycle k, final (residual) value Re, tax rate T, sales price p, sale volume of lignite per year x/pt, yearly volume of a mass exploitation xM, unit cost of mass exploitation. This paper presents also the problem of costs and prices of lignite with reference to the connection between lignite mining and electrical power station in market conditions. Lignite mines can't choose the recipient of its lignite, because this is an electrical power station, with is associated with lignite mines. This article describes the main elements, which influence the costs and prices of lignite. Concerning exploitation cost the deciding factor having influence on its value is cover to lignite deposit factor.
Access status: Open Access ,
Lusatian lignite - modern, competitive and sustainable lignite mining
(2007) Ketzmer, Wolfgang
Since the beginning of the 1990s, comprehensive refurbishment and modernization measures of the opencast mine equipment have been carried out to increase and ensure competitiveness of the opencast mines of the Lusatian lignite mining area. The development of modern and competitive lignite mining required a comprehensive rehabilitation of plants and equipment of the raw coal transportation - the so-called 'Coal connecting railway system Lusatia'. Immission protection for the neighbourhood of opencast mines, recultivation and ambitious shaping and use of the post-mining landscape as well as socially-acceptable resettlements are challenges Vattenfall Europe Mining AG faces with regard to a sustainable lignite mining. In 2011 the importance of the energy region Lusatia will be further enhanced by the starting of the commercial operation of the Boxberg unit R with an installed capacity of 675 MW. The long-term development of the Lusatian lignite mining area has to be considered for a period of at least 40 years. Lusatia has an enormous potential with more than 12 billion tones of lignite. Vattenfall will concentrate on the application of the CO2-free power plant technology for the future use of run-of-mine lignite in modern, environmentally friendly and most of all competitive power plants.
Access status: Open Access ,
Rekultywacja terenów poeksploatacyjnych w kopalniach węgla brunatnego w Polsce
(2007) Kasztelewicz, Zbigniew; Kozioł, Kazimierz; Klich, Jerzy
The lignite mining profile in the range of land obtaining and return under mining activities has been presented in the article. Hitherto existing achievements of the mines in reclamation and utilization of pits have been also described.
Access status: Open Access ,
Studium optymalizacji scenariuszy technologicznych kopalni węgla brunatnego Legnica
(Wydawnictwa AGH, 2010) Jurdziak, Leszek; Kawalec, Witold
Technological schedules of the planned Legnica lignite mine placed in area of fields: West, East and North, have been analyzed with the application of open pit optimization methods. A special methodology of lignite deposit modelling which contain: lignite deposit classification according to current economic criterion, block model construction according to accepted recognition of lithological structures, block modelling of lignite quality construction based on zonal interpolation of selected parameters and creation the alternative economic models for analyzed scenarios. Several ultimate pits have been generated (using the Lerchs-Grossmann pit optimization algorithms) for every scenario on the basis of preliminary estimations of mining costs and applied lignite price formulae. The influence of lignite price variability on economic results has been analyzed. The long-term schedules studies of the mine development have been presented.
Access status: Open Access ,
The effect of power plant efficiency, lignite quality and inorganic matter on CO2 emissions and competitiveness of Greek lignite
(2007) Kavouridis, Konstantinos; Roumpos, Christos; Galetakis, Mihail
Greece, mining approximately 70 Mt annually, is the second lignite producer in the EU and fifth largest in the world. Lignite is a key strategic fuel for Greece because it's a very cheap and stable source of energy that is readily available in large quantities. The future exploitation of lignite and hard coal deposits in Greece and Europe depends on the possibility of the coal industry to adapt the environmental requirements of Kyoto Protocol, regarding the control of greenhouse gas emissions. The $CO_{2}$ charges through the Emission Trading Scheme (ETS) will increase the operating cost of existing coal fired power plants and currently is the main reason for a lack of investment in coal fired units in many EU member states. $CO_{2}$ reductions through fuel switching (from coal to gas) have become increasingly expensive and risks jeopardising European competitiveness. Furthermore technologies for $CO_{2}$ capture in fossil-fuel power plants and $CO_{2}$ sequestration could be exploited only in the longer term (after 2020). To remain lignite as a major component of the Greek energy mix, technological solutions and policies are needed which will enable lignite to contribute to the solutions for climate change. In the short and medium term the increased power plant efficiency and the continuous application of qualitative criteria in lignite deposit exploitations (improved calorific value and reduced $CaCO_{3}$ content) will be proved as the only capable of delivering competitive lignite/coal - fired generation and contributing to preserve resources and reduce $CO_{2}$ emissions.
Access status: Open Access ,
Węgiel brunatny - perspektywy rozwoju
(2007) Kasztelewicz, Zbigniew; Kozioł, Kazimierz; Kozioł, Wiesław; Klich, Jerzy
The paper characterizes the most promising Polish lignite deposits. It also presents the possibilities of using it for energy needs in the perspective of a 100-120 years. The study concerns such strategic deposits like »Legnica«, »Gubin - Mosty« and »Złoczew«. The last is the satellite deposit of »Bełchatów« Mine, making the prospect for Bełchatów Power Plant to be active until 2070.
Access status: Open Access ,
Wydajność i czas pracy koparek wielonaczyniowych w kopalniach węgla brunatnego w Polsce
(2007) Kasztelewicz, Zbigniew; Kozioł, Kazimierz
There are two basic parameters which describe excavators work in Polish lignite mines, i.e. efficiency and working time. Presented indices describe individual types of excavators and an average value for all machines operating in the mine. Former exploitation results prove the proper use of their technical parameters, not only on the field of productivity but also time of work. Received values of those parameters are estimated as an European level. This parameters would be even higher when it had been possible to eliminate limitations which appeared periodically at the mine sites. Those limitations appeared in lignite mining industry on two fields: technical and organizational (shortage of parts, shortage of additional machinery, financial limits, standstills in peak energy demand hours, etc.).
Access status: Open Access ,
Zagospodarowanie terenów pogórniczych w KWB »Konin« w Kleczewie SA
(2007) Kasztelewicz, Zbigniew; Michalski, Arkadiusz; Jagodziński, Zbigniew; Czaplicki, Paweł
Hitherto existing achievements of the Lignite Mine in Konin in the land reclamation of the post mining activities have been presented in the article. The reclamation and utilization of the already closed pits and those planned to liquidation in the nearest period have been described.