Претрага
105 items
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Multi-Criteria Approach for Selecting Optimal Dozer Type in Open-Cast Coal Mining
Ivan Janković, Stevan Đenadić , Dragan Ignjatović , Predrag Jovančić , Tomislav Šubaranović, Ivica Ristović (2019)... necessary. The auxiliary machinery provides the possibility of using the capacities of basic machinery adequately and timely. Further, it must be mentioned that the auxiliary machinery generates up to 20% of the total mining expenses. Dozers are the most commonly used machines. Choosing the adequate dozer ...
... necessary. The auxiliary machinery provides the possibility of using the capacities of basic machinery adequately and timely. Further, it must be mentioned that the auxiliary machinery generates up to 20% of the total mining expenses. Dozers are the most commonly used machines. Choosing the adequate dozer ...
... open-cast coal mining, in addition to the basic machinery which consists of highly productive machines (bucket-wheel excavators, bucket-chain excavators, spreaders, conveyor-belt transporters, etc.) that provide an uninterrupted exploitation of mineral ores, the usage of auxiliary machinery is also necessary ...Ivan Janković, Stevan Đenadić , Dragan Ignjatović , Predrag Jovančić , Tomislav Šubaranović, Ivica Ristović . "Multi-Criteria Approach for Selecting Optimal Dozer Type in Open-Cast Coal Mining" in Energies, MDPI (2019). https://doi.org/https://doi.org/10.3390/en12122245
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Fuzzy expert analysis of the severity of mining machinery failure
Mining machinery failure is almost an everyday occurrence. Usually the failures bare certain consequences, which require additional financial costs to repair and restore the system to its operational state. The consequences are viewed through negative and damaging effects a failure has on the machine, health and safety of the employees, work environment, and on the environment. The removal of the consequences of the failure requires additional financial investment, which has a negative impact on the company’s business. In order ...Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković. "Fuzzy expert analysis of the severity of mining machinery failure" in Applied Soft Computing, Elsevier BV (2020). https://doi.org/10.1016/j.asoc.2020.106459
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Fuzzy Model for Risk Assessment of Machinery Failures
The main goal of this research was the development of an algorithm for the implementation of negative risk parameters in a synthesis model for a risk level assessment for a specific machine used in the mining industry. Fuzzy sets and fuzzy logic theory, in combination with statistical methods, were applied to analyze the time picture state of the observed machine. Fuzzy logic is presented through fuzzy proposition and a fuzzy composition module. Using these tools, the symmetric position of the ...... assessment model is useful for any engineering system. Keywords: fuzzy theory; risk; mining machinery failure 1. Introduction Sudden failures of different parts of engineering systems are everyday occurrences in the mining industry, and they often lead to negative consequences that can have an impact on ...
... assessment model is useful for any engineering system. Keywords: fuzzy theory; risk; mining machinery failure 1. Introduction Sudden failures of different parts of engineering systems are everyday occurrences in the mining industry, and they often lead to negative consequences that can have an impact on ...
... algorithm. From this point of view, mining is one of the most complex industries in terms of technology, the machinery used, the cost of unplanned breakdowns, and the work environment where the technology operates. The distinctiveness of working conditions in the mining industry and the correlations between ...Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković. "Fuzzy Model for Risk Assessment of Machinery Failures" in Symmetry, MDPI AG (2020). https://doi.org/10.3390/sym12040525
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Application of Thermal Imaging in Surface Mining
Milanka Negovanović (2022)Termalno snimanje se sve više koristi u rudarskoj industriji kao jedan od dijagnostičkih alata za praćenje određenih proizvodnih procesa, kao i stanja opreme i mašina. Predstavlja nedestruktivnu i beskontaktnu metodu ispitivanja koja omogućava rano otkrivanje problema, planiranje održavanja sa minimalnim kvarovima, sprečavanje neplaniranih poremećaja, posmatranje materijala u nepristupačnim ili opasnim područjima i poboljšanje bezbednosti i produktivnosti. Termalno snimanje koristi specijalizovane termalne kamere sa unutrašnjim detektorima koji identifikuju veoma male temperaturne varijacije i proizvode sliku tog nevidljivog infracrvenog ili toplotnog ...Termalno snimanje, nedestruktivne metode testiranja, površinska eksploatacija, termalne kamere, rudarske operacijeMilanka Negovanović. "Application of Thermal Imaging in Surface Mining" in 15th International Conference OMC 2022, Zlatibor, 12-15th October 2022, Jugoslovenski komitet za površinsku eksploataciju (2022)
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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)
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A fuzzy-based decision support model for evaluation of mining machinery
Tanasijević Miloš (2016)Tanasijević Miloš. "A fuzzy-based decision support model for evaluation of mining machinery" in Proceeding of International Conference ‘’48th International October Conference on Mining and Metallurgy’’, Bor:University of Belgrade, Technical Faculty in Bor and Mining and Metallurgy Institute Bor (2016): 15-18
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Effectiveness assessment of agricultural machinery based on fuzzy sets theory
Miodragović Rajko, Tanasijević Miloš, Mileusnić Zoran, Jovančić Predrag. "Effectiveness assessment of agricultural machinery based on fuzzy sets theory" in Expert Systems with Applications 39 no. 10, Oxford, UK:Pergamon (2012): 8940-8946. https://doi.org/DOI: 10.1016/j.eswa.2012.02.01
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Optimal dynamic management of exploitation life of the mining machinery: models with undefined interval
Vujić Slobodan, Miljanović Igor, Maksimović Svetozar, Milutinović Aleksandar, Benović Tomo, Hudej Marijan, Dimitrijević Bojan, Čebašek Vladimir, Gajić Grozdana (2010)Vujić Slobodan, Miljanović Igor, Maksimović Svetozar, Milutinović Aleksandar, Benović Tomo, Hudej Marijan, Dimitrijević Bojan, Čebašek Vladimir, Gajić Grozdana. "Optimal dynamic management of exploitation life of the mining machinery: models with undefined interval" in Journal of Mining Science (2010): 425-430
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Managing the exploitation life of the mining machinery for an unlimited duration of time
Vujić Slobodan, Stanojević Radoslav, Ivanov Vencislav, Zajić Borislav, Miljanović Igor, Maksimović Svetomir, Stefko Boševski, Benović Tomo, Hudej Marjan (2011)Vujić Slobodan, Stanojević Radoslav, Ivanov Vencislav, Zajić Borislav, Miljanović Igor, Maksimović Svetomir, Stefko Boševski, Benović Tomo, Hudej Marjan. "Managing the exploitation life of the mining machinery for an unlimited duration of time" in Yugoslav Journal of Operations Research 21 no. 1, -:University of Belgrade, Faculty of Organizational Sciences, Belgrade (2011): 25-34. https://doi.org/10.2298/YJOR1101137V
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Optimal dynamic management of exploitation life of the mining machinery: models with limited interval
Vujić Slobodan, Miljanović Igor, Boševski Stefko, Kasaš Karolj, Milutinović Aleksandar, Gojković Nebojša, Josipović Pejović Milena, Dimitrijević Bojan, Gajić Grozdana, Čebašek Vladimir (2010)Vujić Slobodan, Miljanović Igor, Boševski Stefko, Kasaš Karolj, Milutinović Aleksandar, Gojković Nebojša, Josipović Pejović Milena, Dimitrijević Bojan, Gajić Grozdana, Čebašek Vladimir. "Optimal dynamic management of exploitation life of the mining machinery: models with limited interval" in Journal of Mining Science 46 no. 5, Germany/USA:Springer (2010): 554-560
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Indeksi kontrole održavanja i korišćenja rotornog bagera
Razvoj površinske eksploatacije se u velikom stepenu zasniva na svestranoj mehanizaciji rudarskih radova. Kako bi se zadovoljili potrebni kapaciteti, neophodna je primena savremene mehanizacije, velikih kapaciteta i pouzdanosti u radu. Naime, sa stepenom povećanja mehanizovanosti radova smanjuje se broj zaposlenih radnika, povećava produktivnost rada, smanjuju troškovi po jedinici proizvoda, a samim tim i povećava ekonomičnost površinske eksploatacije. Predmet istraživanja su rotorni bageri SRs 1200 koji predstavljaju samohodne mašine kontinuiranog dejstva namenjene za otkopavanje jalovine i korisne supstance na površinskim ...Jovana Mitrović, Predrag Jovančić, Dragan Ignjatović, Stevan Đenadić, Filip Miletić. "Indeksi kontrole održavanja i korišćenja rotornog bagera" in XI Međunarodna konferencija "Ugalj i kritični minerali 2023", CCM 2023, Zlatibor, 11-14. oktobar 2023., Beograd : Jugoslovenski komitet za površinsku eksploataciju (2023)
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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 ...... AUXILIARY MACHINERY IN OPEN-CAST LIGNITE MINES: A CASE STUDY OF BULLDOZERS Dragan Ignjatović!, Predrag Jovančić!, Stevan Đenadić!, Ivan Janković?, Ivica Ristović! !- University ог Belgrade – Faculty ог Mining and Geology, Belgrade, SERBIA, dragan.ignjatovic(q)rgf.bg.ac.rs; 2 Ministry of Mining and Energy ...
... auxiliary machinery in open-cast lignite mines: a case study of bulldozers Dragan Ignjatović, Predrag Jovančić, Stevan Đenadić, Ivan Janković, Ivica Ristović Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] The optimization of auxiliary machinery in open-cast ...
... overburden and coal systems on open pit mines of EPS (in Serbian) (2018) Study, Faculty of Mining and Geology, Belgrade 2. Jovantié, P. Maintenance of mining machines (in Serbian), University of Belgrade — Faculty of Mining and Geology, Belgrade, 2014. 3. Gransberg, D.D.; O’Connor, E.P. Major Equipment Life-cycle ...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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Primena termografije u rudarstvu
Stevan Đenadić, Vesna Damnjanović, Predrag Jovančić, Dragan Ignjatović, Dragutin Jovković, Filip Miletić (2019)Danas, gotovo da nema oblasti u nauci i tehnici u kojoj se Infracrvena termografija ne primenjuje kao metoda za lociranje i praćenje zagrejanih objekata ili tela, beskontaktnu procenu temperature površina, i nedestruktivno ispitivanje materijala. U radu su prikazane mogućnosti i perspektive primene ove metode u oblasti rudarstva.... https://www.amsj.com.au/thermography-in-mining/ 66 [19] Damnjanovic V., Savremena primena termografije, VI Memorijalni naučni skup iz zaštite životne sredine „Docent dr Milena Dalmacija, 29-30. mart 2018, Novi Sad, Srbija, Zbornik radova [20] Machinery Lubrication: Using Thermal Imaging to ...
... Energies. Vol. 10, 1987, 2017. doi: 10.3390/en10121987 [18] Mining Review Africa: Thermal imaging camera averts mining conveyor belt disasters. URL: https://www.miningreview.com/products-services/thermal-imaging-camera- averts-mining-conveyor-belt-disasters/ https://www.imcontrol.com.au/whit ...
... non-destructive material testing. This paper presents the possibilities and prospects of applying this method in the field of mining. Key words: infrared thermography, mining, monitoring 1. Uvod Termografija, kao oblast nauke koja se temelji na zakonima zračenja a koja se bavi vizualizacijom ...Stevan Đenadić, Vesna Damnjanović, Predrag Jovančić, Dragan Ignjatović, Dragutin Jovković, Filip Miletić. "Primena termografije u rudarstvu" in IX Međunarodna konferencija UGALJ 2019, Zlatibor, Srbija, 23-26. oktobar 2019., Jugoslovenski komitet za površinsku eksploataciju (2019)
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Determining the Availability of Continuous Systems at Open Pits Applying Fuzzy Logic
This work presents a model for determining the availability of continuous systems at open pits by applying fuzzy logic and fuzzy inference systems. The applied model was formed by the synthesis of independent partial indicators of availability. The model is based on an expert system for assessing the availability of continuous mining systems. The availability of the system, as a complex state parameter, is decomposed into the partial indicators, reliability, and convenience of maintenance, and the fuzzy compositions, used ...системи, континуални систем експоатације, површински коп, рударство, расположивост, фази логика, max–min композиција, min–max композицијаMiljan Gomilanović, Miloš Tanasijević, Saša Stepanović. "Determining the Availability of Continuous Systems at Open Pits Applying Fuzzy Logic" in Energies, MDPI AG (2022). https://doi.org/10.3390/en15186786
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Analiza primene višekriterijumskih metoda u optimizaciji izbora hidruličnih bagera na površinskim kopovima uglja
Hidraulični bageri primenjuju se u različitim oblastima privrede a najzastupljeniji su u građevinarstvu i rudarstvu. Na površinskim kopovima sa kontinualnim sistemima, klasifikuju kao pomoćna mehanizacija a na površinskim kopovima sa diskontinualnim sistemima, kao osnovna mehanizacija. Kako je u oba slučaja njihova primena neizostavna, važno je izvršiti adekvatnu analizu postojećih podataka, u cilju optimizacije izbora tipa hidrauličnog bagera u odnosu na uslove rada datog površinskog kopa. U radu su opisane različite višekriterijumske metode koje su korišćene za analizu hidrauličnih bagera. ...... COAL MINING Hydraulic excavators are used in different areas of industry, most often in construction and mining. On open-cast coal mines with continuous systems, they are classified as auxiliary machinery, while on open- cast coal mines with discontinuous systems they are basic machinery. As their ...
... disadvantages of these methods are presented, as well as the quality of output information which can affect the future purchasing decisions of this machinery. Key words: multi-criteria methods, open-cast coal mine, auxiliary machines, hydraulic excavators. https://doi.org/10.1016/j.procs.2015.07.081 ...
... у слободном приступу. - Претрага репозиторијума доступна је на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr ...Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Filip Miletić, Ivan Janković. "Analiza primene višekriterijumskih metoda u optimizaciji izbora hidruličnih bagera na površinskim kopovima uglja" in Tehnika, Centre for Evaluation in Education and Science (CEON/CEES) (2019). https://doi.org/10.5937/tehnika1903369D
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Application of Expansive Mortars for the Formation of Artificial Screens During Blasting in Urban Areas
During construction of buildings in urban areas, sometimes there is a need to blast solid rock mass in the immediate vicinity of the surrounding buildings. In that case, the aim is not only to increase the efficiency of blasting, but also to reduce harmful effects of ground vibration induced by blasting. At the same time, it is very important to protect the buildings located in the safe zone from the blast site as well as remaining rock mass around ...Milanka Negovanović, Lazar Kričak, Stefan Milanović, Nikola Simić, Jelena Majstorović. "Application of Expansive Mortars for the Formation of Artificial Screens During Blasting in Urban Areas" in 31st International Conference Ecological Truth & Environmental Research-EcoTER'24, Sokobanja, 18-21. jun 2024, Bor : Tehnički fakultet u Boru (2024)
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Overwiew of In-Pit Crushing & Conveying Technology in Open Pit Mines
The conditions under which contemporary surface mining operations is carried out obviously becoming increasingly complex. In such complex conditions, the optimization of haulage systems as the technological phase with the largest share in the total operating costs, is very important from the aspect of achieving profitability of the mining project. In a large number of cases, the application of traditional haulage systems with trucks (as the most dominant type of haulage in open pit mines) does not lead to ...Ali Nasirinezhad, Dejan Stevanović, Dragan Ignjatović, Petar Marković. "Overwiew of In-Pit Crushing & Conveying Technology in Open Pit Mines" in 8th International Conference MIining And Environmental Protection, Sokobanja, 22-25 September 2021, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia (2021)
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Rock excavation methods in urban areas
Stefan Milanović, Lazar Kričak, Milanka Negovanović, Nikola Simić, Jovan Marković, Nikola Đokić (2023)Povećan obim građevinskih radova, koji podrazumevaju izgradnju novih stambenih i poslovnih objekata, hotela, garaža, tržnih centara i slično, sve je češći u urbanim sredinama. Ovakvi radovi sve više dolaze u kontakt sa različitom vrstom problema prilikom izgradnje, kao jedan od tih problema izdvajamo pojavu čvrste stenske mase prilikom otkopavanja na lokacijama izgradnje budućih objekata predviđenih građevinskim projektom. Prilikom izgradnje objekata tj. dela objekta koji podrazumeva podzemne prostorije nekog objekta, potrebno je vršiti iskop materijala na lokaciji, međutim taj materijal ...Stefan Milanović, Lazar Kričak, Milanka Negovanović, Nikola Simić, Jovan Marković, Nikola Đokić. "Rock excavation methods in urban areas" in Podzemni radovi, Beograd : Rudarsko-geološki fakultet (2023). https://doi.org/10.5937/podrad2342047m
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Determining the Impact of Cutting Elements State on the Bucket–Wheel Excavator Vibration and Energy Consumption
Background There are two types of specifc sizes’ measurements. The frst is the measurement of energy consumption in a working technological process, and the second is the measurement of vibration, which is displayed over amplitudes of speed. There is an interplay between these two processes. Increasing the power consumption, the value of the vibration speed amplitudes increases. Purpose The process of the determination of machining parameters was based on minimizing the power consumption and vibration of the cutting tool, ...Filip Miletić, Predrag Jovančić, Miloš Milovančević, Miloš Tanasijević, Stevan Đenadić. "Determining the Impact of Cutting Elements State on the Bucket–Wheel Excavator Vibration and Energy Consumption" in Journal of Vibration Engineering & Technologies, Springer (2022). https://doi.org/10.1007/s42417-022-00482-3
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A Fuzzy Expert Model for Availability Evaluation
Each technical system within itself carries the great potential danger of possible occurrence of failure and damages. Mining machines are characteristic by great investment values, costs of unplanned shutdowns, complex working conditions, and environment and workers hazards. Systematic monitoring of the mining machinery is of great importance for the management of the mining companies. Availability is the overall concept of quality of service. Includes information regard to operating state, an idle state, a standby state and shut down. The ...... unplanned shutdowns, complex working conditions, and environment and workers hazards. Systematic monitoring of the mining machinery is of great importance for the management of the mining companies. Availability is the overall concept of quality of service. Includes information regard to operating ...
... pp. 2-5, 1996. [5] Tanasijevic M., A fuzzy-based decision support model for evaluation of mining machinery. Full Papers Proceeding of International Conference, 48th International October Conference on Mining and Metallurgy, Technical Faculty Bor, 15 - 18, Serbia, 28. Sep - 01. Oct, 2016. [6] G ...
... 0,84 II 3102 572 0,84 III 2635 622 0,81 IV 2757 664 0,81 V 2008 343 0,85 V. CONCLUSION Bulldozers represent the most often utilized machinery on the surface mines. These machines are produced in large batches and it is very important to be selected in accordance with the working environment ...Dejan Ivezić, Miloš Tanasijević, Predrag Jovančić, Radiša Đurić. "A Fuzzy Expert Model for Availability Evaluation" in Proceedings of the 2019 20th International Carpathian Control Conference (ICCC), AGH University of Science and Technology, Kraków - Wieliczka, Poland (2019)