Претрага
130 items
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Application of Project Management Process on Environmental Management System Improvement in Mining-Energy Complexes
... of threats to the environment 1 16–21 20 Identifying causes of the adverse effects caused by operations 1 6–11 21 Identifying opportunities for eliminating causes of the adverse effects caused by operations 2 11–17 Energies 2016, 9, 1071 11 of 20 Table 5. Cont. No. Project Management Activities ...
... development principles include indicators of response; indicators of causes represent the environmental consequences of mining and energy complex operations; and indicators of conditions are related to environmental quality [7]. The principle of sustainable development affirmed by the Bergen Declaration ...
... 1 2–3 3 Defining key problems in the functioning of mining and energy complex protection systems 1 3–4 4 Defining the impact of energy complex operations on environmental quality 1 2–5 5 Analyzing the possibility of applying the basic principles of sustainable development in the energy sector 2 4–5 ...Jelena Malenović Nikolić, Dejan Vasović , Ivana Filipović , Stevan Mušicki, Ivica Ristović . "Application of Project Management Process on Environmental Management System Improvement in Mining-Energy Complexes" in Energies (2016). https://doi.org/https://doi.org/10.3390/en9121071
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Analysis Of the Process Of Carbon Capture Utilization And Storage In Underground Reservoirs
John Nyame (2024)The importance of mitigating the effects of global climate change has necessitated an in-depth exploration of innovative strategies to reduce carbon dioxide (CO2) emissions. Among these strategies, Carbon Capture, Utilization, and Storage (CCUS) has emerged as a promising and transformative solution. This master thesis delves into the diverse realm of CCUS processes, aiming to unravel the positives challenges, and opportunities within this dynamic field. The analysis begins with a systematic examination of carbon capture technologies, encompassing post-combustion, pre-combustion, and oxy-fuel combustion ...... CcAPEx=Cfacilities (15) The main costs contributing: to the OPEX are those of energy consumption and maintenance. The cost of energy consumption occurs during the pressurization process, and the maintenance cost is assumed to be 1% of the CAPEX. COPEX=CEnergy consumpti0n+0·01CCAPEX (16) Since the CO> ...
... Žni=1ni(exi,in—exu,om) (13) Life cycle cost analysis (LCC) is an economic method for estimating all costs arising from the ownership, operation, and maintenance of equipment. These costs are organized as capital expenditures (CAPEX) and operational expenditures (OPEX). CAPEX is incurred when a business ...
... are calculated as gross sales price on the shore terminal minus transport fee in the pipeline to shore. The cost of operational personnel and maintenance are very marginal. The cost of OPEX is estimated at 7million USD every year. 6.2. Examples of CCUS projects under development 6.2.1 Northern ...John Nyame. Analysis Of the Process Of Carbon Capture Utilization And Storage In Underground Reservoirs, 2024
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The optimization of auxiliary machinery in open-cast lignite mines: a case study of bulldozers
One of the most important prerequisites for the successful operation of the open-cast lignite mine is to carry out all the auxiliary works timely with the necessary quality. The most important and most commonly used auxiliary machines are bulldozers. Engaging time of bulldozers use is in direct relation with the coefficients of the time and capacity utilization of the continuous system for the excavation of coal and tailings, which indicates their importance. More than 100 bulldozers have been hired ...... moment with minimal cost (Figure 3). [2] Equivalent Uniform Annual Cost (EUAC) 4 a Optimal Economic Life: Min EUAC , Total Cost i i Operations and Maintenance Cost Capital Cost vW Time of Use Figure 3. The economic life of the machine, based on the minimal cost method (1) Hourly ownership ...
... costs, which are including labor, auxiliary facilities, installations required for work; e Maintenance costs, which are including maintenance labor, spare parts, tools, devices and facilities for maintenance. where: T C,=C, +] fadt+C,7, 0 C, — total life cycle costs, C, — ownership costs, C; — ...
... In this period profit is the highest due to low maintenance costs. Subsequent period has larger operational costs, but machine still generates profit, while finally, there is a period during Wwhich machine still сап operate, but with large maintenance cost and declined reliability, meaning that we аге ...Dragan Ignjatović, Predrag Jovančić, Stevan Đenadić, Ivan Janković, Ivica Ristović. "The optimization of auxiliary machinery in open-cast lignite mines: a case study of bulldozers" in 7th International Symposium Mining and Environmental Protection, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia (2019)
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Novi model za postizanje optimalne proizvodnje na naftnom polju Amal
Elnori Elmabrouk Ali Elhaddad (2015-04-16)Doktorskom disertacijom analizirani su i proučavani problemi proizvodnje nafte iprimenjene metode za njihovo rešavanje na naftnom polju Amal. Ukratko jeprikazana proizvodnje nafte u Libiji, njene karakteristike i rezerve, da bi se videoznačaj ovog naftnog polja.Utvrđeno je da su na naftnom polju Amal ključni problemi koji prate procesproizvodnje taloženje parafina, pojava slojnog peska, neefikasan rad gasliftsistema, neefikasna desalinizacija nafte i ekološki problemi. Proizvodniproblemi, pojedinačno i više njih zajedno, na nekim bušotinama uzrokovali susmanjenje proizvodnje nafte od 40 do 75%. Zbog ...... analysis of oil well operations in Gas Lift, which should result in more efficient oil production on the one hand and the increase in oil production on the other hand. It has also proposed a new modern desalination method, which considerably decreases production and operations costs, as well as ...
... stanice 8, 9, i 10. Proizvodnja nafte se vrši uglavnom pomoću gaslifta. Naftno polje Amal je u vlasništvu kompanije „Harouge Oil Operations“ (prethodno „Veba Oil Operations“), koja predstavlja zajedničko ulaganje Nacionalne naftne kompanije Libije i kanadske kompanije „Petro-Canada“ sa učešćem od po ...
... presented at the 1995 SPE International Symposium on Oilfield Chemistry, Texas, and February 14-17. Harouge (2011), About Harouge Oil Operations, Harouge Oil Operations, www.vebalibya.com. Harvie C. (2013) Oil and economic development: Libya in the post-Gaddafi era, Economic Modelling, Volume 32 ...Elnori Elmabrouk Ali Elhaddad. "Novi model za postizanje optimalne proizvodnje na naftnom polju Amal" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2015-04-16)
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Novi model za postizanje optimalne proizvodnje na naftnom polju Amal
Elnori Elmabrouk Ali Elhaddad (2015-04-16)Doktorskom disertacijom analizirani su i proučavani problemi proizvodnje nafte iprimenjene metode za njihovo rešavanje na naftnom polju Amal. Ukratko jeprikazana proizvodnje nafte u Libiji, njene karakteristike i rezerve, da bi se videoznačaj ovog naftnog polja.Utvrđeno je da su na naftnom polju Amal ključni problemi koji prate procesproizvodnje taloženje parafina, pojava slojnog peska, neefikasan rad gasliftsistema, neefikasna desalinizacija nafte i ekološki problemi. Proizvodniproblemi, pojedinačno i više njih zajedno, na nekim bušotinama uzrokovali susmanjenje proizvodnje nafte od 40 do 75%. Zbog ...... analysis of oil well operations in Gas Lift, which should result in more efficient oil production on the one hand and the increase in oil production on the other hand. It has also proposed a new modern desalination method, which considerably decreases production and operations costs, as well as ...
... stanice 8, 9, i 10. Proizvodnja nafte se vrši uglavnom pomoću gaslifta. Naftno polje Amal je u vlasništvu kompanije „Harouge Oil Operations“ (prethodno „Veba Oil Operations“), koja predstavlja zajedničko ulaganje Nacionalne naftne kompanije Libije i kanadske kompanije „Petro-Canada“ sa učešćem od po ...
... presented at the 1995 SPE International Symposium on Oilfield Chemistry, Texas, and February 14-17. Harouge (2011), About Harouge Oil Operations, Harouge Oil Operations, www.vebalibya.com. Harvie C. (2013) Oil and economic development: Libya in the post-Gaddafi era, Economic Modelling, Volume 32 ...Elnori Elmabrouk Ali Elhaddad. "Novi model za postizanje optimalne proizvodnje na naftnom polju Amal" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2015-04-16)
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BEYOND 2020 - Geology explorations and open pit activities affectation in reclamation designing in Kolubara Coal Mines (KCM) Serbia, new considerations
Geology explorations in KCM runs from 1936. year up to these days and still ongoing. Results in >7,200 drill holes with ≈600,000 m of core drilling and gave lignite ore resources of > 4,1Bt, which 1,15Bt are excavated since 1986. of XIX up to early years of XXI century. For further mining operations in open pits stay 1,5Bt of lignite. Under waste heaps are ≈80 km2, additional 85 km2 should be filled. All of that masses/areas were, are ...Bojan Dimitrijević, Bogoljub Vučković, Radmila Gaćina. "BEYOND 2020 - Geology explorations and open pit activities affectation in reclamation designing in Kolubara Coal Mines (KCM) Serbia, new considerations" in 17th International Conference of the open and underwater mining of minerals, Sts. Constantine and Helena Resort, Varna, 18-22 September, Bulgaria, Sofia, Bulgaria : Scientific and Technical Union of Mining, Geology and Metallurgy, (2023)
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Analysis of a simplified model for determining rock mass oscillation velocity at the Kovilovača open pit
... of seismic shocks in the open pit Kovilovača were performed during blasting, conducted for the purpose of deposit exploitation [9]. Two blasting operations were performed. Balkanit 60/1500, detonex 65/1500 and ANFO 70/1500 were used as explosives. Activation of explosives in the borehole was performed ...
... Belgrade, Serbia, 1996; pp. 141—150. Trajković, S.; Tokalić, R.; Lutovac, S. Sfudy of Seismic Impacts on Adjacent Building due to Blasting Operations at Kovilovača Open Pit, Faculty of Mining and Geology, Belgrade, Serbia, 2004; pp. 2-43. 204 ...Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Luka Crnogorac. "Analysis of a simplified model for determining rock mass oscillation velocity at the Kovilovača open pit" in 9th International Conference Mining and Environmental protection MEP, 24 – 27 May 2023, Sokobanja, Serbia, Belgrade : University of Belgrade-Faculty of mining and geology (2023)
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Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic
Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković (2020)Artificial lift methods have applications in oil wells where oil production is no longer possible due to natural reservoir energy, so this necessary energy is added by introducing lift methods. In order to achieve optimum production, the selection of an artificial lift method is very important. This paper uses fuzzy logic as a mathematical and conceptual model for selection of the optimal artificial lift method. The outcome or IF-THEN rules, as the central part of the model, is based ...... dominantly manual with automated individual operations; semi-automatic; dominantly automatic with secondary manual controls; fully automated}. Parameter A3 represents maintenance (maintainability). It contains supportability and design predispositions for maintenance. Grades are given depending on the g ...
... dominantly manual with automated individual operations; semi-automatic; dominantly automatic with secondary manual controls; fully automated}. Parameter A3 represents maintenance (maintainability). It contains supportability and design predispositions for maintenance. Grades are given depending on the g ...
... problems in the well. A3 = {spare parts, tools, and people fully dislocated, maintenance on demand; corrective maintenance present; corrective and service maintenance; planned preventive maintenance; proactive maintenance}. Parameter B1 considers depth. The values of the depth of the well are translated ...Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković. "Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic" in Energies, MDPI AG (2020)
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A comparison between ARIMA, LSTM, ARIMA-LSTM and SSA for cross-border rail freight traffic forecasting: the case of Alpine-Western Balkan Rail Freight Corridor
Miloš Milenković, Miloš Gligorić, Nebojša Bojović, Zoran Gligorić. "A comparison between ARIMA, LSTM, ARIMA-LSTM and SSA for cross-border rail freight traffic forecasting: the case of Alpine-Western Balkan Rail Freight Corridor" in Transportation Planning and Technology, Informa UK Limited (2023). https://doi.org/10.1080/03081060.2023.2245389
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Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine
... Lutovac Suzana1, Bajić Sanja1, Gaćina Radmila1, Ravilić Marina1 Received: May 29, 2015 Accepted: June 15, 2015 Abstract: During blasting operations, the potential energy of explosive materials is transformed into a mechanical work. That energy, in the vicinity of blasting location, destructs ...
... "Nepričava" surface mine were performed during blasting, conducted for the purpose of deposit exploitation (Trajković & Lutovac, 2006). Three blasting operations were performed. Balkanit 60/1000 and Videksil 65/2000 are used as explosive materials. The activation of explosives in boreholes was performed ...Suzana Lutovac, Sanja Bajić, Marina Ravilić, Radmila Gaćina. "Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine" in Underground Mining Engineering, Belgrade : University of Belgrade, Faculty of Mining and Geology (2015). https://doi.org/10.5937/podrad1526009L
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Mine ventilation system planning using genetic algorithms
The most common problem in contemporary mining practice related to the planning and analysis of ventilation systems is the optimization of partially regulated air distribution in mine ventilation networks. This paper presents a two step optimization procedure for partly regulated air distribution in mine ventilation networks. The first step is the determination of air distribution in all branches using the well known Hardy-Cross method. In the second step the distribution and parameters of air flow regulators with minimum engaged ...coal, lignite, and peat; ventilation systems; coal mining; underground mining; ventilation; mathematical models; design; air flow; optimization; calculation methodsNikola Lilić, Ranka Stanković, Ivan Obradović. "Mine ventilation system planning using genetic algorithms" in 6. international symposium on mine planning and equipment selection, Ostrava (Czech Republic), 3-6 Sep 1997, A.A. Balkema, Rotterdam (Netherlands) (1997)
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Development of Open Educational Resources (OER) for Natural Language Processing
In this paper we present the development of an online course at the edX BAEKTEL platform named “Lexical Recognition in the Natural Language Processing (NLP)”. It is based on the course of the same name for PhD studies at the University of Belgrade, Faculty of Philology. There are not many courses in Computational Linguistics (CL) on OER platforms, and there is none in Serbian either for CL or NLP. We have developed this course in order to improve this ...... Portuguese, Russian, Thai, Korean, Italian, Spanish, Serbian, Norwegian, Arabic, German, Polish and many more. For text processing simple string operations can be used, but underlying e- dictionaries enable much more sophisticated approaches. Besides simple regular expressions, graphs that represent ...
... as the use of information from e-dictionaries for output transformations by transducers. More types of variables are introduced as well as operations on them. 11. Organization of graphs in cascades enables complex text transformation. Each graph in a cascade is a transducer that transforms ...Cvetana Krstev, Biljana Lazić, Ranka Stanković, Giovanni Schiuma, Miladin Kotorčević. "Development of Open Educational Resources (OER) for Natural Language Processing" in The Sixth International Conference on e-Learning (eLearning-2015), September 2015, Belgrade, Serbia, Belgrade : Belgrade Metropolitan Univesity (2015)
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Метода променљивих околина за решавање проблема p-центра са поузданом мрежом
У овом раду је разматран проблем p-центра са поузданом мрежом (енгл. Reliable p-center facility location problem - RpCFLP). Решавање проблема подразумева иницијално успостављање p ресурса и алокације корисника, као и накнадну реалокацију корисника у складу са новонасталим сценаријима који садрже информације о онеспособљеним ресурсима и осталим измењеним улазним подацима. За решавање посматраног проблема предложена је метахеуристика заснована на итеративној варијанти основне методе променљивих околина (енгл. Iterated basic variable neighborhood search - IBVNS). Резултати тестирања предложене метахеуристике указују на њену ...Јована Рађеновић, Стефан Мишковић, Оливера Станчић. "Метода променљивих околина за решавање проблема p-центра са поузданом мрежом" in 50. Међународни симпозијум о операционим истраживањима SYM-OP-IS, Тара, Србија, 18-21.9.2023, Београд : Медија центар „Одбрана” (2023)
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Značaj izvodjenja Proktorovog opita na komunalnom otpadu
Komunalni otpad predstavlja jedan od ključnih problema današnjice. U Srbiji je najčešći vid odlaganja otpada na komunalne deponije i zbog toga je bitno ispravno i sigurno ga skladištiti. Zbijanje komunalnog otpada predstavlja jednu od osnovnih komponenti procesa odlaganja. Kako bi se što bolje predvidelo ponašanje komunalnog otpada neophodno je pre zbijanja na terenu laboratorijski odrediti maksimalnu suvu zapreminsku težinu i optimalnu vlažnost. U dosadašnjoj praksi u svetu za to se koristi standardizovan Proktorov opit. U radu će biti prikazani ...... Srbije. LITERATURA: Cox, J. T., Hanson, J., Yesiller, N., Clarin, J. & Noce, D. E.: Optimization of Compaction Procedures and Waste Placement Operations at MSW Landfills, Global Waste Management Symposium, Orlando, Florida. 2014. Hanson, J.L., Yesiller., N., Von Stockhausen, S.A. and Wong, W. W ...Jovana Janković, Dragoslav Rakić, Tina Đurić, Irena Basarić Ikodinović, Laslo Čaki. "Značaj izvodjenja Proktorovog opita na komunalnom otpadu" in Zbornik radova osmog naučno-stručnog međunarodnog savetovanja - Geotehnički aspekti građevinarstva, Savez građevinskih inženjera Srbije (2019)
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Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit
... quently used in case of equidistant values for variable R. Here it is necessary that h is a small number, which is not the case with blasting operations in mining engineering. Previous studies have shown that the value of the parameter n moves principally in the interval from 1 to 3, most often ...
... (11) In practice it may be taken that R1 is the smallest reduced distance, while Rs is the greatest reduced distance observed during blasting operations, i.e measurements. In the formula (8), the values v(Rs), v(R1), Rs and R1 we take from the table of experimental data, so that we have: c ...
... the model for solving the rock mass oscillation law is determined, taking: n RKv which is valid for given environment, where blasting operations were performed. 3 DEFINING THE STATISTICAL CRITERIA To evaluate the degree of correlation between recorded (measured) and calcu- lated data ...Suzana Lutovac, Nebojša Vidanović, Čedomir Beljić, Zoran Gligorić. "Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit" in Mining and Metallurgy Engineering Bor, Bor : Mining and Metallurgy Institute Bor (2015). https://doi.org/10.5937/MMEB1503053L
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Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention
Gas wells, particularly those situated onshore, play a vital role in the global energy sector by supplying a significant portion of natural gas. However, operational challenges, notably gas hydrate formation, pose substantial issues, leading to complications such as flowline blockages and unexpected well shutdowns. Gas hydrates, crystalline structures resembling ice, ...Gas Well, Gas Hydrate Formation, Well Modeling, Well Performance Optimization, Choke Position Adjustments, Methanol InjectionMilica Ješić, Bojan Martinović, Stefan Stančić, Miroslav Crnogorac, Dušan Danilović. "Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention" in Underground Mining Engineering, Beograd : Rudarsko-geološki fakultet (2023)
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Ograničenja primene optimizacionih algoritama u slučaju kopova
Proces optimizacije površinskih kopova, kao sastavni deo strateškog planiranja, veoma je važan sa stanovišta ostvarivanja maksimalnih efekata proizvodnje. To je složen zadatak koji vrlo često podleže vrlo strogim geometrijskim i drugim praktičnim rudarskim ograničenjima. Ova ograničenja u posebno su izražena na površinskim kopovima uglja, te u značajnoj meri mogu povećati stepen neizvesnosti rudarskog projekta, odnosno izazvati neželjena dejstva u pogledu profitabilnosti poslovanja. Iz tog razloga, veoma je važna primena savremenih optimizacionih alata, koji u značajnoj meri mogu olakšati celokupan ...... continuous mining operations when using stockpiles. Advances in Orebody Modelling and Strategic Mine Planning I. AusiMM, 2011 Benndorf J.: Application of efficient methods of conditional simulation for optimising coal blending strategies in large continuous open pit mining operations. International ...Dejan Stevanović, Mirjana Banković, Milica Pešić Georgiadis, Petar Marković, Dejan Ranković. "Ograničenja primene optimizacionih algoritama u slučaju kopova" in XIV Međunarodna konferencija OMC 2020, Zlatibor, Srbija, 14-17. oktobar 2020., Beograd : Jugoslovenski komitet za površinsku eksploataciju (2020)
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Linear-motor plunger pump increases lifting efficiency
Bojan Martinović, Dušan Đekić, Dušan Danilović, Pavel Isaev. "Linear-motor plunger pump increases lifting efficiency" in Oil & Gas Journal (2022)
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English for Geology Students. 1
Lidija Beko (2023)... of the Crystals was only accessible due to the pumping equipment used by the mining company. In 2015, the Cave was allowed to flood when mining operations cease and so the crystals may once again begin to grow! ___ Using the web pages below, and any others you can find, write a description of how ...Lidija Beko. English for Geology Students. 1, Belgrade : The Faculty of Mining and Geology, 2023
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Improving efficiency of thermal power plants through mine coal quality planning and control
Главни циљ контроле квалитета угља у рудницима лигнита је снабдевање термоелектрана угљем чији квалитет мора да се креће унутар одређених квалитативних ограничења. Карактеристике угља могу да утичу на ефикасност, поузданост и расположивост како котла тако и јединица за контролу емисије. У овом раду аутори су презентовали интегрисану симулацију рударског процеса као нови приступ у истраживању променљивости калоричне вредности угља приликом експлоатације комплексног лежишта лигнита. Резултати таквог приступа омогућавају драгоцен увид у перформансе континуалног рударског система у смислу контроле променљивости ...Mirjana Banković, Dejan Stevanović, Milica Pešić, Aleksandra Tomašević, Ljiljana Kolonja. "Improving efficiency of thermal power plants through mine coal quality planning and control" in Thermal Science, Vinča Institute of Nuclear Sciences (2018). https://doi.org/10.2298/TSCI170605209B