Browsing by Subject "lignite"

Now showing 1 - 20 of 68

Access status: Open Access ,
About the issue of determination of solid rocks position in the coal bed's top wall in lignite quarries using drilling works
(2009) Mazáč, Josef; Kurka, Miroslav; Mikoláš, Milan
Overburden mining in lignite quarries has to deal - among other difficulties - with the occurrence of rocky grounds. The mining and exploration of these rocks requires increased cots and implementation of special technologies. These rocks are coherent or incoherent bodies of various shapes, ticknesses, sizes and types of placement. These various types of rocky grounds are bound to different geological structures and types of mother soils, because they originate from various periods of diagenesis of top wall soils - clays and sands. Actual experiments using geophysical methods of occurrence examination of these solid rocks have not brought expected and necessary results there. The failure of application of geophysical methods (caused by their inaccuracy, small depth range, and problematic implementation in the conditions of the mine Bilina) proves that one of possible solutions, which would credibly specify the range and placement of solid sandstone bodies, is the utilization of drilling exploration in an inspissated boring network suitably chosen for this purpose. With the issue of determination of these solid rocks by use of drilling works deals this paper.
Access status: Open Access ,
Analiza parametrów pracy krajowych kopalń węgla brunatnego
(Wydawnictwa AGH, 2011) Kasztelewicz, Zbigniew
The article presents a comparison of numerous parameters describing the operation of Polish lignite mines. Coal production and overburden stripping, overburden to coal ratio, the amounts of water pumped out, water to coal ration and employment were analyzed. An analysis and comparison of capacity, time of malfunctions, energy consumption and age structure was also conducted. To summarize the article, a comparison of chosen parameters of Polish and German BCS systems was performed.
Access status: Restricted ,
Analiza petrograficzna pozostałości po procesie zgazowania węgla brunatnego
(Data obrony: 2016-12-13) Sikoń, Kamil
Wydział Geologii, Geofizyki i Ochrony Środowiska
W pracy został poruszony proces zgazowania fluidalnego oraz produktów, które powstają w czasie tego procesu. Budowa geologiczna złoża Szczerców została krótko omówiona. Węgiel brunatny oraz karbonizaty zostały poddane analizie petrograficznej, by przybliżyć ich skład.
Access status: Restricted ,
Analiza petrograficzna pozostałości po zgazowaniu węgla brunatnego ex situ
(Data obrony: 2018-03-28) Raszowski, Michał
Wydział Geologii, Geofizyki i Ochrony Środowiska
Eksperymentalnemu zgazowaniu w reaktorze ex situ poddano miękki węgiel brunatny ze złoża Turów o wysokiej zawartości wilgoci. Przeprowadzone badania petrograficzne umożliwiły ocenę efektywności procesu zgazowania. Analizy składu petrograficznego wykorzystanego w eksperymencie węgla wykazały, że cechował się dobrą i bardzo dobrą przydatnością do zgazowania. Z uwagi na przedwczesne zakończenie eksperymentu, związane z zapadnięciem stropu reaktora, znaczna część zużytego węgla została jedynie wysuszona, a nie zgazowana. W efekcie jedynie 39,3% składu petrograficznego badanej pozostałości po zgazowaniu stanowią składniki zgazowane.
Access status: Open Access ,
Analiza porównawcza efektywności pracy maszyn podstawowych w kopalniach węgla brunatnego - problemy z unifikacją wskaźników
(Wydawnictwa AGH, 2010) Kozioł, Wiesław; Ciepliński, Andrzej; Machniak, Łukasz
The following report presents problems concerning recording, the stock-taking of the archival data, calculation and comparing (benchmarking) the coefficients of efficiency of bucket wheel excavator in lignite mines. These problems were illustrated computational examples. The finding uniform procedure of accumulating and calculation coefficients of utilization of primary machine in lignite mines has the important influence on operations review and increase of efficiency technological arrangements.
Access status: Open Access ,
Analiza wyników produkcyjnych polskiej branży węgla brunatnego za lata 2005-2009 oraz przegląd obecnej sytuacji w górnictwie węgla brunatnego krajów Unii Europejskiej
(Wydawnictwa AGH, 2010) Żuk, Stanisław
The object of this paper is to present the achievements of lignite mining industry in Poland, on the basis of production data presented for the four operating mines in the last five years, compared to the production results achieved in 2009. The basic data concerning the operational performance in active areas of lignite mining is described. In the second part of the article an attempt was made to present the energy sector based on lignite against a background of whole Polish energy sector. Furthermore a comparison of the latter's current situation with lignite mining sector in EU and the role of lignite in Europe's energy system was conducted.
Access status: Restricted ,
Analiza zmienności wartości wytypowanych parametrów jakościowych węgla brunatnego w brzeżnych partiach rowu tektonicznego Kleszczowa w polu Szczerców
(Data obrony: 2018-10-11) Świątczak, Katarzyna
Wydział Geologii, Geofizyki i Ochrony Środowiska
Analizę zmienności przeprowadzono dla najważniejszych parametrów jakościowych węgla brunatnego w obszarach północnym i południowym złoża Szczerców, tj. wilgotności całkowitej w stanie roboczym (Wtr), popielności w stanie roboczym (Ar), popielności w stanie suchym (Ad), wartości opałowej w stanie roboczym (Qir), zawartości siarki całkowitej w stanie roboczym (Str) oraz zawartości siarki całkowitej w stanie suchym (Std). Obecność uskoków poprzecznych w rejonie północnym złoża Szczerców powoduje obniżenie Wtr i podwyższenie Str w strefach ich występowania, a w obszarze południowym jest przyczyną wysokich zawartości Std. Następstwem prawdopodobnego istnienia stożków napływowych w brzeżnej partii środkowej części rejonu północnego i południowo-zachodniej strefie obszaru południowego złoża mogą być większe zawartości Ar i Ad w tych zonach. Wysad solny „Dębiny” ma wpływ na obniżenie wartości Wtr, Str i Std, a także wzrost Qir we wschodnich partiach południowej części złoża. Większa liczba ławic w rejonie południowym złoża w porównaniu z obszarem północnym może być wynikiem zaawansowanej tektoniki i następowania po sobie procesów obniżania i wynoszenia tego obszaru.
Access status: Restricted ,
Analiza zmienności zawartości siarki w wybranych złożach rejonu Konina
(Data obrony: 2017-12-12) Nita, Mikołaj
Wydział Geologii, Geofizyki i Ochrony Środowiska
Złoże Tomisławice jest największym złożem satelickim w rejonie Konina. Do badań zmienności zawartości siarki wykorzystano metody statystyki klasycznej, takie jak: statystyki opisowe, analizę korelacji i regresji oraz analizę regresji wielorakiej. W celu lepszego poznania jakości kopaliny zbadano metodami statystycznymi wartości zawartości popiołu, wartości opałowej oraz wilgotności. W drugiej części analizy użyto metod geostatystycznych. Posłużyły one do określenia anizotropii zawartości siarki. Na podstawie odpowiednio dobranych modeli teoretycznych utworzono mapę zawartości siarki w złożu.
Access status: Restricted ,
Badania geochemiczne węgla brunatnego według wymagań Unii Europejskiej – oznaczenia kadmu na przykładzie węgla brunatnego ze złoża „Szczerców”
(Data obrony: 2013-10-29) Korczak, Anna Maria
Wydział Geologii, Geofizyki i Ochrony Środowiska
The lignite in the Polish energy sector is and will remain for the next decades, a strategic raw material used to produce energy and heat. The production of heat and energy, which consists of high temperature coal combustion processes associated with the creation of waste, both solid and volatile, which pose a serious threat to the environment. A particularly negative role in these are heavy metals, such as cadmium. The reducing emissions is one of the conditions to reduce the negative impact of coal on the environment. It is necessary to monitor the contents of toxic elements in coal before his operation. The created maps of pollutants distribution within the deposit in advance will allow to predict the quality of coal which in turn allows for adjustment of the installation of pollution to the environment and thus the implementation of „clean technologies” energy production based on coal. This type of research is also important in view of the legal provisions of the European Union. Poland as a member of the EU is required to cut emissions by 2020 Pb and Cd from the anthropogenic sources. The starting point for the preparation of the Polish energy sector to the inevitable problem of heavy metals emissions should be the monitoring their content in a combustion fuel.
Access status: Restricted ,
Badania geochemiczne węgla brunatnego według wymagań Unii Europejskiej – oznaczenia ołowiu na przykładzie węgla brunatnego ze złoża „Szczerców”
(Data obrony: 2013-10-29) Korniluk, Magdalena
Wydział Geologii, Geofizyki i Ochrony Środowiska
The energy coal processing power is related to the emission into the atmosphere of many compounds which have a negative impact on the environment The laws of the European Union since 2020 year introducing to limits emissions of $Pb$ and $Cd$ from anthropogenic sources. Before taking actions to reduce emissions need to be carry systematic research of coal quality, with particular reference to the content of the elements polluting the environment, such as $Cd$ and $Pb$. These researches will make it possible to monitor the contents of toxic elements in coal before the operation in order to adapt the energy processing technology of coal to its quality. The research is extremely important in the case of lignite, which is a strategic raw material for the energy production and also low-quality fuel, responsible for emissions of the toxic compounds into the atmosphere.
Access status: Restricted ,
Badanie anizotropii zmienności parametrów złoża węgla brunatnego Bełchatów w wytypowanym fragmencie Pola Szczerców
(Data obrony: 2012-07-19) Jurek, Justyna
Wydział Geologii, Geofizyki i Ochrony Środowiska
The Bełchatów lignite deposit is located in the central part of Poland, in the tectonic Kleszczów graben. The aim of study has been description anisotropy variability of thickness and qualitative parameters: tonal sulphur content Std, ash content Ad, calorific value in the central part of the Pola Szczerców. The analysis includes statistical and geostatistical description of the variability of deposit parameters investigated.The analysis has shown, that on analyzed part of deposit the lignite has high sulfating and that variability of analyzed parameters is from low to high. Anisotropy researches indicated that variability of analysed parameters is in two basically different directions: W-E(direction of minimum variability), N-S(direction of maximum variability).
Access status: Restricted ,
Biosorbenty do usuwania barwników z wody
(Data obrony: 2018-01-24) Ciesielska, Aleksandra
Wydział Energetyki i Paliw
Access status: Restricted ,
Budowa geologiczna środkowej części rowu Złoczewa
(Data obrony: 2013-12-11) Dukacz, Paweł
Wydział Geologii, Geofizyki i Ochrony Środowiska
The Złoczew Graben is located at the NE border of the Fore-sudetic Monocline and the Łódz Synclinorium. The basement of the graben includes Upper Jurassic sediments whereas the graben itself is filled mostly with Miocene succession hosting the lignite deposit and overlain by thick Quaternary strata. The following project analyses the results of drillings completed in the central part of lignite deposit for the purpose of deposit assessment (B1+C1 assessment category). Geological structure of the studied fragment of the Złoczew Graben is illustrated with geological cross-sections, structural maps and 3D models supplemented by calculations of selected deposit parameters (volume, average thickness, stripping ratio, etc.). Finally, geological evolution of the Złoczew Graben is summarized.
Access status: Open Access ,
Ciągły pomiar zawartości popiołu w węglu brunatnym na przenośnikach z taśmami z linkami stalowymi
(Wydawnictwa AGH, 2009) Kiełbik, Paweł; Papierkowski, Marcin; Rotko, Marian; Skorodecki, Jan; Zieliński, Wiesław
Paper presents a new method of measurement of the ash content in lignite, providing a simple and relatively cheap solution to a problem of continuous monitoring of this parameter directly on the steel cord conveyor belts. This method, possible to be utilized in points where till now practically none measurement was possible, has been introduced on the background of radiometric methods used so far in continuous measurements of ash content in lignite. The paper provides a general description of methods used in continuous measurements of the ash content on usual belts (textile), a new backscattering - absorption method, as well as findings from tests of the ash monitor prototype executed in conditions of industrial exploitation at one of the main conveyer flight in PGE KWB »Bełchatów« SA.
Access status: Open Access ,
Criteria of verification of potential lignite resource base for underground gasification
(2012) Hajdo, Stanisław; Klich, Jerzy; Galiniak, Grzegorz; Polak, Krzysztof; Różkowski, Kazimierz
W artykule przeanalizowano światowe eksperymenty i próby przemysłowe podziemnego zgazowania węgla brunatnego (lignitów) pod kątem warunków złożowych prowadzonych eksperymentów, jakości i ilości (skali) zgazowanego węgla, czasu trwania, osiągniętych rezultatów oraz zaproponowanych na tej podstawie kryteriów do kwalifikacji złóż węgla do zgazowania podziemnego. Stanowiło to punkt wyjścia do sformułowania wymagań technologiczno-złożowych w odniesienie do kwalifikacji polskich złóż węgla brunatnego do podziemnego zgazowania. W analizach najistotniejsze znaczenie miały próby UCG przeprowadzone w USA, Rosji (i dawnym ZSRR) oraz w Australii.
Access status: Open Access ,
Dotychczasowe doświadczenia rekultywacji wyrobisk po eksploatacji złoża węgla brunatnego »Sieniawa«
(Wydawnictwa AGH, 2010) Galiniak, Grzegorz; Jarosz, Jerzy; Tomaszewski, Rafał
The article presents the actual state of reclamation of the post-mining areas of the lignite opencast mine of KWB »Sieniawa« Sp. z o.o. Development of »Sieniawa« Mine is discussed the issues pertaining to the transformation the land surface resulting from the conducted mining operations, as well as the overall prevailing conditions that are related to land reclamation and development. Data that characterize the reclamation of lands for forestry, agriculture and water management purposes are presented.
Access status: Open Access ,
Economic parameters and quality assessment of lignite from the Szczerców deposit (central Poland)
(Wydawnictwa AGH, 2016) Pawelec, Sandra
Bełchatow Lignite Mine is the largest producer of lignite in Poland with estimated coal reserves of 700 million tons. The mine excavates two lignite deposits Bełchatow and Szczercow. The Szczercow lignite deposit occupies the western part of the Kleszczow trough, located in the Polish Lowlands. The main part of the lithostratigraphic profile of the Szczercow lignite deposit is a multilayer coal complex, whose thickness varies from 1 to 180 m, with the overburden ratio of 2.84:1. The average thickness of the balance lignite amounts to 40 m. The carbonaceous coefficient of the coal complex in the predominant part of the deposit is over 70%, but locally reaches even up to 100%. Lignite from the Szczercow deposit is of an average technological quality. It typically contains 51.7% of total moisture, 23.6% of ash on dry basis, 3.36% total sulphur recalculated to dry basis, and a net calorific value of 7.33 MJ/kg. Random reflectance (R$_{0}$) is 0.27% with huminite group macerals averaging at 85%. According to the International Classification of In-Seam Coals and Low Rank Coal Utlization, the technological code of the lignite from the Szczercow deposit is: humic low-rank C (orto-lignite) 19 51 23 33. Similarities between the quality parameters of lignite from the Szczercow and Bełchatow deposits will allow it to be burned in the Bełchatow lignite-fired power plant and may give a chance to extend its activity after the completion of lignite mining from the Bełchatow deposit.
Access status: Open Access ,
Efficiency of drilling large diameter wells with cutter bits on Szczerców opencast
(2015) Macuda, Jan
Drilling of large diameter wells to be used for dewatering of lignite deposits is inefficient due to the presence of large packages of loose Quaternary and Tertiary strata. Moreover, considerable dewatering of the rock mass favors serious complications and drilling break-downs connected with the sliding of wellbore walls. Accordingly, new technical and technological solutions, which enable faster drilling, are searched for. In this way the time of operation of drilling mud on the near-wellbore zone can be shortened and the safety of drilling works increased. For the sake of obtaining higher rates of drilling in large diameter dewatering wellbores a new cutter bit 0.96 m of diameter was designed. Drillability tests in industrial conditions followed. These tests were performed in separated, loose and low-compaction, macroscopically homogeneous rocks of similar drillability. The tests were performed on selected sections 0.3 to 1.0 m long, and each of the sections was drilled at constant rotational velocity and weight on bit. Prior to these tests there were established limitations regarding weight on bit and rotational velocity of the bit, in reference to the technical characteristic of the rig, strength of the string and the cutter bit. Two different regression models were considered to find a dependence of mechanical drilling rate on weight on bit and rotational velocity of the bit for selected macroscopically homogeneous strata. The most favorable results were obtained for a power model representing impact of axial stress and rotational velocity of the bit on the drilling rate. They have been confirmed by calculated regression coefficients and statistical parameters. Industrial tests were performed to assess the efficiency of drilling large diameter dewatering wells with a cutter bit of 0.96 m diameter on the basis of the presented model of average drilling rate. The results for the average drilling rate turned out to be much higher than the ones obtained so far.
Access status: Restricted ,
Geostatystyczne badanie anizotropii zmienności parametrów złoża węgla brunatnego „Gubin”
(Data obrony: 2010-09-30) Nieckula, Monika
Wydział Geologii, Geofizyki i Ochrony Środowiska
Lignite is at present the only fuel which can ensure that Polish economy is self-sufficient and energy secure. One of the most prospective deposit of this raw material is the bedded deposit „Gubin”, situated in the south-west part of Lubuskie province. In this work an attempt to recognise the spatial variability of lignite deposit parameters, i.e. the ash content (Ad), sulphur content (Sdt), calorific value (Qri) and seam thickness, was made for two balance beds in the Gubin deposit. The analysis was conducted on the basis of data coming from a geological documentation from 1969. The characteristic of variability structure conducted geostatic with the use of semivariograms, clearly proves the anisotropic variability of the ash and sulphur content and the isotropic variability of seam thickness and calorific value. In order to verify the results they were compared with the results of analyses based on other deposits of the same raw material. Similarities in the variability structure of the comparable parameters were found.
Access status: Open Access ,
Globalne problemy górnictwa węgla brunatnego
(Wydawnictwa AGH, 2011) Tajduś, Antoni; Dubiński, Józef
The basis issues of global and national trends in lignite mining industry has been presented. Authors have formulated the key barriers and challenges for the Polish lignite mining industry and have proposed the priority lines of action for the development of this industry. On the basis of mining production and resources data as well as the structure of primary energy and electricity production in Poland the potential of lignite fuel and its importance for continued use in the domestic economy as the guarantor of a stable Polish energy policy have been emphasized.