Претрага
206 items
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Using gravity data to define structural correlation affecting the formation of Neogene basins
A gravity survey can help to define the structural correlation in the study area. The structures that have influenced the development of Neogene basins can be defined using gravity data. By applying mathematical transformations to gravity data, the geological structures (faults, nappes, etc.) that impacted the formation of Neogene basins can be defined. We have taken the part of the Dinarides as the test region. The paper presents the results obtained using the procedure residual, vertical gradient, and total ...Snežana Ignjatović, Ivana Vasiljević, Branisav Sretković, Milanka Negovanović. "Using gravity data to define structural correlation affecting the formation of Neogene basins" in The 54th International October Conference on Mining and Metallurgy, Bor Lake, Serbia, 18-21 October 2023, Bor : University of Belgrade, Technical Faculty in Bor (2023) М33
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Fault type assessment based on vertical gravity gradient anomalies – advantages and limitations
The type of dip-slip faults can be assessed based on the analysis of vertical gravity gradients. Theoretically, just a simple comparation of the gradient extreme values can give us an answer whether the fault is normal or reverse (thrust). Practical application of this method is far more complicated and the results depend on a number of parameters, such as a complexity of geological setting, the quality of gravity data, dip angle and displacement of the fault, density contrast, etc. ...Ivana Vasiljević, Snežana Ignjatović, Branislav Sretković. "Fault type assessment based on vertical gravity gradient anomalies – advantages and limitations" in Vth Congress of the Geologists of the Republic of North Macedonia, Ohrid, Republic of North Macedonia, September 27-28, 2024, Macedonian Geological Society (2024) М33
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Detecting the boundaries of gravity anomaly sources using the vertical and tilt derivative
In geophysical exploration, it is important to define the boundaries of anomaly sources that are not visible on the surface. Information about the boundaries of sources can help during geophysical geological modeling of the survey area. A model of the survey area can help in better defining the geological structure and geological development of an exploration area. This paper presents how the procedures of vertical and tilt derivative on gravity data can help to detect the ...Snežana Ignjatović, Ivana Vasiljević, Branislav Sretković. "Detecting the boundaries of gravity anomaly sources using the vertical and tilt derivative" in The 55th International October Conference on Mining and Metallurgy , Kladovo, Serbia, 15 - 17. October 2024, Bor: Mining and Metallurgy Institute Bor ( 2024 ). https://doi.org/DOI: 10.5937/IOC24099I М33
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Tehničko rešenje Programski sistem za planiranje eksploatacije i deponovanja uglja u cilju upravljanja kvalitetom uglja
Kolonja Božo, Knežević Dinko, Stanković Ranka, Lilić Nikola, Ignjatović Dragan, Jovančić Predrag, Stevanović Dejan, Kolonja Ljiljana, Banković Mirjana, Tomašević Aleksandra (2014)Kolonja Božo, Knežević Dinko, Stanković Ranka, Lilić Nikola, Ignjatović Dragan, Jovančić Predrag, Stevanović Dejan, Kolonja Ljiljana, Banković Mirjana, Tomašević Aleksandra. Tehničko rešenje Programski sistem za planiranje eksploatacije i deponovanja uglja u cilju upravljanja kvalitetom uglja, Rudarsko-geološki fakultet, Univerzitet u Beogradu, 2014 M81
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Study of general environmental awareness of the urban population, Case study involving Belgrade, the capital of Serbia
Nišić Dragana, Knežević Dinko, Petković Aleksandra, Ignjatović Milica, Kostadinović Jovana. "Study of general environmental awareness of the urban population, Case study involving Belgrade, the capital of Serbia" in Proceedings of 4th HASSACC 2016 - Virtual Conference Human And Social Sciences at the Common Conference, Zilina:University of Zilina (2016): 33-39. https://doi.org/10.18638/hassacc.2016.4.1.201 M33
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Crystal structure of cobalt-substituted calcium hydroxyapatite nano-powders prepared by hydrothermal processing
Veselinović Ljiljana, Karanović Ljiljana, Stojanović Zoran, Bračko Ines, Marković Smilja, Ignjatović Nenad, Uskoković Dragan (2010)Veselinović Ljiljana, Karanović Ljiljana, Stojanović Zoran, Bračko Ines, Marković Smilja, Ignjatović Nenad, Uskoković Dragan. "Crystal structure of cobalt-substituted calcium hydroxyapatite nano-powders prepared by hydrothermal processing" in Journal of Applied Crystallography 43 no. 2, Rosenoerns Alle 1; PO Box 227; Copenhagen V, 1502; Denmark:Blackwell Munksgaard (2010): 320-327. https://doi.org/10.1107/S0021889809051395 M21
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Synthetical bone-like and biological hydroxyapatites: A Comparative Study of Crystal Structure and Morphology
Marković Smilja, Veselinović Ljiljana, Lukić Miodrag J., Karanović Ljiljana, Bračko Ines, Ignjatović Nenad, Uskoković Dragan (2011)Marković Smilja, Veselinović Ljiljana, Lukić Miodrag J., Karanović Ljiljana, Bračko Ines, Ignjatović Nenad, Uskoković Dragan. "Synthetical bone-like and biological hydroxyapatites: A Comparative Study of Crystal Structure and Morphology" in Biomedical Materials 6(4) no. 045005 PMID 21659698, :IOP Publishing (2011). https://doi.org/10.1088/1748-6041/6/4/045005 M22
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The choice of high gradient magnetic separation processes for removal of Fe2O3 carriers from quartz raw material
Sekulić Živko, Bartulović Zoran, Mihajlović Slavica, Ignjatović Miroslav, Savić Ljubinko, Jovanović Vladimir, Nišić Dragana (2017)Sekulić Živko, Bartulović Zoran, Mihajlović Slavica, Ignjatović Miroslav, Savić Ljubinko, Jovanović Vladimir, Nišić Dragana. "The choice of high gradient magnetic separation processes for removal of Fe2O3 carriers from quartz raw material" in Gospodarka Surowcami Mineralnymi- Mineral Resources Managnament 33 no. 4, Warsaw, Poland:DE GRUYTER OPEN (2017): 93-106. https://doi.org/https://doi.org/10.1515/gospo- M23
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Izbor rotornih bagera za proces revitalizacije: primer rotornih bagera SRs 1200 u rudarskom basenu Kolubara
Predrag Jovančić, Dragan Ignjatović, Stevan Đenadić, Filip Miletić, Goran Todorović, Dragan Novaković (2020)Revitalizacija je proces ili skup tehničkih zahvata na mašini kojim se vrši zamena svih dotrajalih ili oštećenih delova metalne konstrukcije. Sastavni deo procesa revitalizacije je i modernizacija zastarele elektro-mašinske opreme. Principi revitalizacije sasvim sigurno nisu sadržani u okviru redovnog godišnjeg ili dnevnog održavanja. Oni predstavljaju održavanje onih veličina koje su značajne za mašinu kao celinu (u ovom slučaju rotorni bager). U ovom radu su analizirani rotorni bageri oznake SRs 1200. Na površinskim kopovima rudarskog basena Kolubara takvih bagera ima ...Predrag Jovančić, Dragan Ignjatović, Stevan Đenadić, Filip Miletić, Goran Todorović, Dragan Novaković. "Izbor rotornih bagera za proces revitalizacije: primer rotornih bagera SRs 1200 u rudarskom basenu Kolubara" in XIV Međunarodna konferencija OMC 2020, Zlatibor, Srbija, 14-17. oktobar 2020., Jugoslovenski komitet za površinsku eksploataciju (2020) М33
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Analysis of the exhaust emissions inventory from auxiliary mining machines
Stevan Đenadić, Aleksandar Mirković, Jovana Mitrović, Filip Miletić, Predrag Jovančić, Dragan Ignjatović (2023)Open-pit coal mines are equipped with a large number of mining machines and vehicles with diesel engines. Due to common daily operation of these machines and vehicles large amounts of exhaust gases which contain numerous pollutants are emitted into the atmosphere. The demand to reduce air pollution induced the activities in developed countries to map and calculate all gases emitted by industries to formulate and select adequate preventive activities. In collaboration with machine manufacturers, emission standards for off-road machines ...Stevan Đenadić, Aleksandar Mirković, Jovana Mitrović, Filip Miletić, Predrag Jovančić, Dragan Ignjatović. "Analysis of the exhaust emissions inventory from auxiliary mining machines" in 9th International Conference Mining and Environmental Protection, University of Belgrade, Faculty of Mining and Geology (2023) М33
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Proučavanje razvića Bihaćkog i Cazinskog basena primenom gravimetrijskih podataka
Bihaćki i Cazinski baseni su neogeni baseni, koji pripadaju spoljašnjim Dinaridima i formirani su tokom kasne faze razvoja Dinarida. Ovi baseni su od posebnog interesa zbog svoje geološke prošlosti i potencijalnih strukturnih karakteristika. U istraživanju, primenjeni su gravimetrijski podaci u clju boljeg razumevanja evolucije ovih basena. Primenom različitih postupaka matematičkih transformacija na gravimetrijskim podacima može se ustanoviti gravitacioni uticaj neogenih basena male gustine i mogu se detektovati strukture, koje su potencijalno vezane za njihovo formiranje. U ovom istraživanju, analiza ...Snežana M. ignjatović, Ivana M. Vasiljević, Nevena R. Andrić-Tomašević, Ana S. Mladenović. "Proučavanje razvića Bihaćkog i Cazinskog basena primenom gravimetrijskih podataka" in Tehnika, Beograd : Savez inženjra i tehničara Srbije (2024). https://doi.org/10.5937/tehnika2403287I М53
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Sustainable Modularity Approach to Facilities Development Based on Geothermal Energy Potential
The study presented in this paper assessed the multidisciplinary approach of geothermal potential in the area of the most southeastern part of the Pannonian basin, focused on resources utilization. This study aims to present a method for the cascade use of geothermal energy as a source of thermal energy for space heating and cooling and as a resource for balneological purposes. Two particular sites were selected—one in a natural environment; the other within a small settlement. Geothermal resources come ...геотермална енергија, Панонски басен, геотермална каскада, енергетска ефикасност, бањски центри, балнеологија, биоклиматска архитектура, стратегије пасивног дизајнирања, модуларни објектиNataša Čuković-Ignjatović, Ana Vranješ, Dušan Ignjatović, Dejan Milenić, Olivera Krunić. "Sustainable Modularity Approach to Facilities Development Based on Geothermal Energy Potential" in Applied Sciences-Basel, МDPI (2021). https://doi.org/10.3390/app11062691 М22
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Adaptive neuro-fuzzy prediction of operation of the bucket wheel drive based on wear of cutting elements
The capacity of the rotor excavator depends largely on the operation of the subsystem for digging. There is a great contribution to the correct and sharp teeth when the capacity is the highest. In the function of time, the teeth become clogged due to abrasive wear, or changes in their geometric shape. To analyze the bucket wheel drive in depend on wear of the cutting elements in this study adaptive neuro fuzzy inference system (ANFIS) approach was implemented. ANFIS ...Filip Miletić, Predrag D. Jovančić, Milos Milovančević, Dragan Ignjatović. "Adaptive neuro-fuzzy prediction of operation of the bucket wheel drive based on wear of cutting elements" in Advances in Engineering Software, Elsevier BV (2020). https://doi.org/10.1016/j.advengsoft.2020.102824 М21а
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Effectiveness Analysis of Different Bucket-wheel Excavators
Coal production in open-pit lignite mines in the Republic of Serbia is performed with continuous work systems. In addition to coal production, the same systems are used for the exploitation of large quantities of overburden. According to the reliability concept, continuous systems are in linear connection. If the failure occurs in one part of the system, that will produce a downtime of the entire system. The initial and most important factor of continuous systems is the bucket-wheel excavator. It ...Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Miloš Tanasijević, Filip Miletić. "Effectiveness Analysis of Different Bucket-wheel Excavators" in 8th International Conference Mining and Environmental Protection, Sokobanja, 22-25 September 2021, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia (2021) М33
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Application of the Fuzzy Model in the Evaluation and Selection of Hydraulic Excavators on Open-Pit Lignite Mine
Stevan Đenadić, Miloš Tanasijević, Vladimir Milisavljević, Dragan Ignjatović, Predrag Jovančić (2021)The production of lignite in large open-pit mines is mainly performed with continuously operating equipment, where bucket-wheel excavators, bucket-chain excavators, belt conveyors, and spreaders are the basic machines. Smaller machines, usually of discontinuous operating nature, are commonly categorized as auxiliary machines. This paper presents the research related to the analysis of auxiliary machine parameters with the case study for a hydraulic excavator. The purpose of the analysis was to develop a model of rating quality of service of the ...Stevan Đenadić, Miloš Tanasijević, Vladimir Milisavljević, Dragan Ignjatović, Predrag Jovančić. "Application of the Fuzzy Model in the Evaluation and Selection of Hydraulic Excavators on Open-Pit Lignite Mine" in SSRN Electronic Journal, Elsevier BV (2021). https://doi.org/10.2139/ssrn.3945617 М33
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Машине и помоћни радови на површинским коповима
Драган Игњатовић, Томислав Шубарановић, Стеван Ђенадић. Машине и помоћни радови на површинским коповима, Београд : Универзитет у Београду, Рударско-геолошки факултет, 2021 Без категорије
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Development of the Cost-Based Model for Monitoring the Lifetime of the Earth Moving Machines
This paper presents the model for the identification of reference points on the lifetime curve of engineering systems. This curve commonly represents the increase and decline of failure in relation to time. A direct correlation between failure rate and costs is assumed in this paper, therefore, statistical and empirical analysis of costs provided reference points. This approach is used for positioning stages of the engineering system’s lifetime with a minimal number of failures and costs, regardless of whether these ...Electrical and Electronic Engineering,Industrial and Manufacturing Engineering, Control and Optimization, Mechanical Engineering, Computer Science (miscellaneous), Control and Systems EngineeringUgljesa Bugarić, Milos Tanasijević, Stevan Djenadić, Dragan Ignjatović, Ivan Janković. "Development of the Cost-Based Model for Monitoring the Lifetime of the Earth Moving Machines" in Machines, MDPI AG (2022). https://doi.org/10.3390/machines10110995 М22
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Održivi razvoj rudarskog sektora
Imajući u vidu sve veću zabrinutost za stanje životne sredine i socioekonomsku nejednakost, sektorska održivost bez obzira na privrednu delatnost, privlači sve veću pažnju kako globalno tako i lokalno. U tom smislu postoji konsenzus kod svih zainteresovanih strana da čovečanstvo treba da usvoji mere za promenu trenutno neodrživih obrazaca proizvodnje i potrošnje. Rudarska industrija igra fundamentalnu ulogu u ovom kontekstu, privlačeći pažnju kroz različite inicijative tokom poslednjih decenija. Neke od njih su čak i primenjene u praksi ali konsenzus ...Vladimir Pavlović, Dragan Ignjatović, Tomislav Šubaranović. "Održivi razvoj rudarskog sektora" in 15. Međunarodna konferencija o površinskoj eksploataciji OMC 2022, Zlatibor, 12.-15.10.2022., Jugoslovenski komitet za površinsku eksploataciju (2022) М33
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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 ...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) М33
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Hydrochemistry of groundwater contaminated by petroleum hydrocarbons: the impact of biodegradation (Vitanovac, Serbia)
Nenad Marić, Jana Štrbački, Sanja Mrazovac Kurilić, Vladimir P. Beškoski, Zoran Nikić, Snežana Ignjatović, Jovana Malbašić (2020)Aquifer contamination by petroleum hydrocarbons leads to measurable changes of groundwater hydrochemistry, primarily due to the microbiological activity. This study analyzes this phenomenon at an historical kerosene-contaminated site in Vitanovac (central Serbia). Due to the long-term hydrocarbon contamination and exposure to aerobic and anaerobic biodegradation mechanisms, the lowest concentrations of O2, NO3−, and SO42− (electron acceptors) and the highest concentrations of Mn and Fe (products of microbial metabolic activity) overlap. The terminal redox-accepting processes in groundwater ranged from oxygen ...Nenad Marić, Jana Štrbački, Sanja Mrazovac Kurilić, Vladimir P. Beškoski, Zoran Nikić, Snežana Ignjatović, Jovana Malbašić. "Hydrochemistry of groundwater contaminated by petroleum hydrocarbons: the impact of biodegradation (Vitanovac, Serbia)" in Environmental Geochemistry and Health, Springer Netherlands (2020). https://doi.org/https://doi.org/10.1007/s10653-019-00462-9 М21