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Упит dcterms_subject_txt:variability of coal quality

2854 items

  • Cutting Resistance Laboratory Testing Methodology for Underwater Coal Mining

    Vladimir Čebašek, Veljko Rupar, Stevan Đenadić, Filip Miletić (2021)
    Geology,Geotechnical Engineering and Engineering Geology
    ... most used for determination of the cutting resistance of the material to be excavated. 2. Coal Mining in Underwater Pit “Kovin” Exploration work in the coal and gravel deposit area began in 1976, while coal exploita- tion began in 1995. Coal is mined from the bottom of the lake connected to the Danube ...
    ... applicability of modified testing methodology to determine cutting resistance for underwater coal mining conditions and the influence of different confining pressure on the final value of coal cutting resistance. Presented results of the modified wedge test indicate a linear functional dependence of the cutting ...
    ... analysis at which the coal exploitation is carried out. The maximum depth at which it is necessary to perform the test is determined since the coal layer is characterized by frequent thickness change, and instead of the second coal layer average depth of 50 m, a maximum depth of 60 m was employed (Figure ...

  • A hydrogeological model of the open-cast mine Tamnava - West Field (Kolubara Coal Basin, Serbia)

    Jelena Ratković, Dušan Polomčić, Dragoljub Bajić, Bojan Hajdin (2016)
    ... Kolubara Coal Basin (KCB) is the strongest link of the Electric Power Industry of Serbia. Since World War II, it has produced more than 580,000,000 tons of coal. Every other kilowatt in Serbia comes from KCB’s lignite (brown coal). A daily extraction rate of as much as 100,000 tons of coal ensures ...
    ... (2011) Modelling of changes of hydrodynamic conditions in the aquatic environment of the Maczki-Bór sand pit due to the fact of planned closure of mining operations (NE part of Upper Silesian Coal Basin - Poland). In: RÜDE R. T., FREUND A. and WOLKERSDORFER, CH. (eds.) Proceedings of the 11th Int ...
    ... at open pit mine „Polje E“ of Kolubara Coal Basin (Republic of Serbia). In: BAN, M., et al. (eds.) CD Proceedings of the 7th Conference on Sustainable Development of Energy Water and Environmental Systems. Ohrid, Republic of Macedonia, 01-07 July, 2012. Zagreb: Faculty of Mechanical Engineering and ...

  • A survey of greenhouse gases production in central European lignites

    Anna Pytlak, Anna Szafranek-Nakonieczna, Weronika Goraj, Izabela Śnieżyńska, Aleksandra Krążała, Artur Banach, Ivica Ristović, Mirosław Słowakiewicz, Zofia Stępniewska (2021)
    Lignit, Gasovi sa efektom staklene bašte, Ugljen dioksid, Metan, Azotni oksid
    ... and the lower level of natural hazard in comparison to the exploitation of hard coal has made lignite an important source of energy. In 2019, 27 countries de- clared using this resource. In many of them, the combustion of lignite contributed to the generation of a significant part of the energy pro- duced ...
    ... The freshwater coal-bearing series of A. Pytlak, A. Szafranek-Nakonieczna, W. Goraj et al. Science of the Total Environment 800 (2021) 149551 2 the Kolubara Basin consist of sand, clay and three coal seams: seam III - Lower coal seam, seam, II -Main coal seam, and seam I -Upper coal seam (Kezovic ...
    ... GHG). GHG emissions are of partic- ular concern because coal mining and burning comprise a high propor- tion of the anthropogenic sources of both CH4 and CO2 (Saunois et al., 2020). The intensification of climate change and the degradation of the natural environment in many areas of the world has instigated ...

  • Maceralni sastav i rang uglja Ibarskog basena

    Željana Novković, Nevena Andrić -Tomašević, Vladimir Simić, Dragana Životić (2022)
    Donjemiocenski ugljonosni Ibarski basen se nalazi u južnoj Srbiji. Intramontanski ektenzivni basen, izdužen u pravcu severozapad-jugoistok ispunjen je slatkovodnim sedimentima koji su formirani kao deo Dinarskog neogenog jezerskog sistema. Paleoreljef basena izgrađen je od paleozojskih amfibolskih škriljaca, sericit-hloritskih škriljaca, krečnjaka, mermera i metabazičnih stena, mezozojskih peščara, laporca, laporovitih krečnjaka, krečnjaka, dolomita, ofiolita i oligo-/miocenskih magmatskih stena. Tercijarne magmatske stene izgrađene su od oligocenskih dacito-andezita i neogenih kvarctlatita/riodacita i piroklastičnih stena. Miocenski sedimenti izgrađeni su od aluvijalnih breča, konglomerata, peščara, ...
    ugalj, macerali, refleksija vitrinita, Ibarski basen

  • Uporedni prikaz proizvodnje električne energije iz uglja zemalja Evrope sa najvećim udelom: politika i projekcija proizvodnje

    Predrag Jovančić, Dragan Ignjatović, Stevan Đenadić (2022)
    Energetski razvoj zemalja Evrope decenijama je bio baziran na uglju. Instalisana snaga svih energetskih kapaciteta koji su zasnovani na uglju je preko 2000 GW. Ugalj je i dalje od bitnog značaja za dobijanje električne energije u Evropi. I pored toga što postoji veliki potencijal uglja, trend je smanjenja proizvodnje električne energije iz uglja do 2050. godine. Imajući u vidu Zelenu agendu i politiku EU, zemlje Evrope se okreću obnovljivim izvorima energije. Srbija u okviru obnovljvih izvora ima potencijala prevashodno ...
    ugalj, električna energija, 2050. godina, projekcija proizvodnje

  • Optimizacija utovarno-transportnih sistema u funkciji planiranja površinskog kopa

    Mirjana V. Banković (2018-07-13)
    Profitabilna eksploatacija sve složenijih ležišta je težak zadatak koji zavisi odtemeljnog procesa analize, planiranja i projektovanja rudnika. Izvodljiv strateškiplan mora da zadovoljava društvena, regulatorna, tehnološka, geometrijska iekonomska ograničenja. Kako bi se postigao osnovni cilj, odnosno profitabilnost iodrživost rudarskog projekta na duži period, neophodno je unapređenjematematičkih modela i informatičke podrške procesima planiranja i optimizacijekoji će omogućiti efikasnu realizaciju ovih ciljeva...
    tehnološki model, integralni model, planiranje, optimizacija,utovarno-transportni sistem, neto sadašnja vrednost projekta
    ... Reducing coal quality attributes variability using properly designed blending piles helped by geostatistical simulation. International Journal of Coal Geology, 84 (2), 83-93. 194 Bian, Z., Dong, J., Lei, S., Leng, H., Mu, S., Wang, H., 2009, The impact of disposal and treatment of coal mining wastes ...
    ... Investigating the variability of key coal quality parameters in continuous mining operations when using stockpiles. Advances in Orebody Modelling and Strategic Mine Planning I. AusIMM. Benndorf, J., 2013, Application of efficient methods of conditional simulation for optimising coal blending strategies ...
    ... Planning for reliable coal quality delivery considering geological variability: A case study in polish lignite mining. Journal of Quality and Reliability Engineering, 2015. Nel, S., Kizil, M., Knights, P., 2011, Improving truck-shovel matching. 35th APCOM Symposium-Application of Computers and Operations ...

  • Formation of geoinformation system of the coal mine with underground coal exploitation

    Milutinović Aleksandar, Miljanović Igor, Petrovski Aleksandar, Josipović Pejović Milena, Beljić Čedomir, Gajić Grozdana, Čebašek Vladimir (2011)

  • Status and tendencies under development and application of underground coal gasification-UCG

    David Petrović, Lazar Kričak, Stefan Milanović, Jovan Marković, Nikola Simić (2018)
    Podzemna gasifikacija uglja u Svetu poslednjih decenija doživljava znatnu ekspanziju u istraživanju i razvoju zbog uveliko iskorišćenih ležišta uglja i loših ekoloških efekata (pri sagorevanju u TE) na životnu okolinu. Srbija ima znatne rezerve uglja, a kada bi se za PGU koristile samo vanbilansne rezerve i otkopni ostaci bilansnih, jasno je kakvi bi bili ekonomski (a i energetski i ekološki) efekti. U radu su sagledane aktivnosti u Svetu na tom planu, pa smatramo da ima smisla i potrebe za primenu ove ...
    energetika, ugalj, ekologija, gasifikacija

  • Natural and geological conditions of coal mining in the pits of the brown coal mine Rembas - Resavica

    Bugarin Mile, Ivković Mirko, Ljubojev Milenko, Ljubojev Vesna, Rakić Dragoslav (2012)

  • Applicability of the input-output analysis in the coal industry of Serbia

    Maksimović Svetomir, Miljanović Igor, Josipović Pejović Milena (2011)

  • Petrological and geochemical studies of lignite from the Tamnava West field, Kolubara basin (Serbia)

    Milena Pajić, Reinhard F. Sachsenhofer, Achim Bechtel, Ksenija Stojanović, Vladimir Krstić, Dragana Životić (2021)
    ... (Pontian) coal-bearmg strata consist of sandy-clayey sediments with threc coal seams. The twenty four (24) representative samples originating from borehole PE/Pgh-127.5 from the main coal seam (depth interval] 60.3-88.2 m) were analysed. Coal from the Tamnava West field is typical humic coal with high ...
    ... Petrological and geochemical studies of lignite from the Tamnava West field, Kolubara basin (Serbia) | Milena Pajić, Reinhard F. Sachsenhofer, Achim Bechtel, Ksenija Stojanović, Vladimir Krstić, Dragana Životić | 72nd Annual Meeting of the International Commitee for Coal and Organic Petrology (ICCP), The ...
    ... Czech Republic Coal ahd Organic Petrology in the Era ofTransition Jrom Fossil to Rehewable Fuels CONFEREN · e + % di e% 5 P_i = : 56 . eo fe O Ofh e, 7 f js. 5» Ре 5 ~ БАН ААН PASTA ai BL Pi Td „ia ONAJ ОШВР. РРА, 2" ž a 5' а • MO. PETROLOGICAL AND GEOCHEMICAL STUDIES OF LIGNITE FROM ...

  • Analiza pouzdanosti dozera angažovanih na površinskim kopovima RB Kolubara

    Filip Miletić, Dragan Milčić, Miloš Tanasijević, Miloš Milovančević (2021)
    U radu je izvršena uporedna analiza pouzdanosti transportnih sistema dozera koji rade na površinskim kopovima Rudarskog basena Kolubara. Period za koji je vršena analiza je prvih deset godina eksploatacije. Efikasnost tehnološkog procesa na otkopavanju korisne mineralne sirovine i otkrivke u velikoj meri zavisi od rada dozera. Iskorišćene su matematičke metode za aproksimaciju i identifikaciju zabeleženih vremena u radu, kako bi se dobili analitički pokazatelji pouzdanosti. Na ovaj način se bitno podiže kvalitet upravljanja procesom eksploatacije i održavanja mašina na ...
    dozeri, pouzdanost, kolubarski ugljeni basen
    ... mathematical methods for approximation and identification of working times in order to obtain analytical reliability indicators. In this way, the quality management of the exploatation and maintenance process is significantly raised. Keywords: dozers, reliability, kolubara mining basin 1. Uvod Rudarska ...
    ... comparative reliability analysis of the dozers transport systems which working on the open pit mines of the Kolubara Mining Basin. Analysis period is first ten years of exploitation. Efficiency of process on excavation of mineral raw material and overburden largely depends of dozers work. The paper uses ...
    ... * ay ULL 0 P of 02 0304 060,81 2 3 45678 10 20 3040 60 80100, 256 , 1 744 , 625 ) ( ÷ ø ö ç è æ - = t CAT e t R ...

  • A fuzzy-based decision support model for effectiveness evaluation - a case study of examination of bulldozers

    Miloš Tanasijević, Predrag Jovančić, Dejan Ivezić, Uglješa Bugarić, Radiša Đurić (2019)
    Effectiveness evaluation is one of the basic components of engineering asset management and maintenance engineering in general. Effectiveness is an overall concept representing a measurement of quality of service level for the analyzed engineering system. This concept contains a series of partial indicators relating to time in operation and time for maintenance activities, as well as functional properties of the system. This article describes the analysis and structuring of partial indicators, as well as the development of a model ...
    Efikasnost, Fazi zaključivanje, Prikupljanje podataka, Buldozer

  • Influence of paleoenvironmental conditions on distribution and relative abundance of saturated and aromatic hydrocarbons in sediments from the NW part of the Toplica basin, Serbia

    Nikola Burazer, Aleksandra Šajnović, Nebojša Vasić, Milica Kašanin-Grubin, Dragana Životić, João Graciano Mendonça Filho, Predrag Vulić, Branimir Jovančićević (2020)
    Stratigraphy,Economic Geology,Geology,Geophysics,Oceanography

  • Spatial assessment of the areas sensitive to degradation in the rural area of the municipality Čukarica

    Natalija Momirović, Ratko Kadović, Veljko Perović, Miloš Marjanović, Aleksandar Baumgertel (2019)
    Nature and Landscape Conservation, Soil Science, Agronomy and Crop Science, Water Science and Technology

  • The Potential of Biomarkers to Distinguish Lower and Middle Miocene Lignites from the Coal-Mining District of Lusatia

    I. Kojic, J. Kus, D. Zivotic, K. Stojanovic (2021)
    ... 04:33:20 The Potential of Biomarkers to Distinguish Lower and Middle Miocene Lignites from the Coal-Mining District of Lusatia I. Kojic, J. Kus, D. Zivotic, K. Stojanovic Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] The Potential of Biomarkers to Distinguish ...
    ... (IMOG) 12–17 September 2021, Montpellier, France THE POTENTIAL OF BIOMARKERS TO DISTINGUISH LOWER AND MIDDLE MIOCENE LIGNITES FROM THE COAL-MINING DISTRICT OF LUSATIA I. Kojić1, J. Kus2, D. Životić1, K. Stojanović1 1University of Belgrade, Serbia 2Federal Institute for Geosciences and Natural ...
    ... Natural Resources, Germany The organic geochemical study of Lower and Middle Miocene lignites from the coal-mining district of Lusatia (Lausitz) in eastern Germany has been performed. Since the samples showed a uniform and low degree of thermal maturity (huminite reflectance 0.32–0.37 %Rr), it ...

  • Non-metallic resources as a significant additional coal open pits income, (possible $ scenario), kolubara coal mines, Serbia

    Vučkovic Bogoljub, Nesic Duško, Bogdanović Vesna, Draško Zoran, Klemčić Goran (2010)

  • Komparacija metoda XRF i ICP-MS na uzorcima uglja i produkata sagorevanja

    Branko Kostić, Dejan Prelević, Sabina Kovač, Ksenija Eraković, Dragana Životić (2022)
    Ugljevi niskog ranga – ligniti u Republici Srbiji predstavljaju glavnu energetsku sirovinu koja se koristi za proizvodnju električne energije. Rudarstvo u Srbiji doprinosi bruto dodatoj vrednosti sa 1,8% (2020; https://publikacije.stat.gov.rs/). Sagorevanjem ugljeva niskog ranga u termoelektranama generišu se velike količine elektrofilterskog pepela i pepela, koje često predstavljaju jedan od izvora zagađenja životne sredine usled sadržaja toksičnih elemenata. Dalja upotreba produkata sagorevanja zavisi od njihovog sastava i sadržaja toksičnih mikroelemenata. Svakodnevno sagorevanje lignita u termoelektranama uslovljava konstantan monitoring potencijalno toksičnih ...
    ugalj, produkti sagorevanja, XRF, ICP-MS

  • Design of the Opencast Coal Mine Drmno Dewatering System

    Vladimir Pavlović, Dušan Polomčić, Tomislav Šubaranović (2014)
    Development of mining in the opencast mine Drmno from Kostolac basin in Serbia is carried out in the increasingly complex geological and hydro geological conditions with the decline of the coal seams to the alluvial part of Europe's largest river Danube. Greater depth and inflow of groundwater significantly increase costs for dewatering facilities construction with the requirement for optimizing of this more and more important surface mining process. Making decision on screen construction in the opencast mine with redesign ...
    dewatering system, groundwater, hydrodynamic model, dewatering wells, screen, reliability, environmental effects.

  • Organic geochemical properties of matrix and xylite coal from the Kolubara and Kostolac basins, Serbia

    Životić Dragana, Bechtel Achim, Sachsenhofer Rainhard, Gratzer Rainhard, Radić Dejan, Obradović Marko, Stojanović Ksenija (2013)