Претрага
1101 items
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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... površinskog kopa. Da bi se podržalo razumevanje sistema modeliranja procesa dati su i opisani UML-a dijagrami aktivnosti koji se koriste u razvoju ovog modela. 4.2.1. Strateško - dugoročno rudarsko planiranje Strateško, odnosno dugoročno, rudarsko planiranje (DRP) traži odgovor na pitanje kako da se najbolje ...
... tehnološki proces postaje kompleksniji, odnosno tehnološki zahtevniji (Stevanović et al., 2014). Iz već navedenog, kao i iz rezultata datih u tabeli 3.1. jasno je da su na površinskim kopovima, najčešće korišćene diskontinualne mašine za otkopavanje i utovar u kamione: - Užetni bager kašikar, - Hidraulični ...
... neretko i istovara i odlaganja jalovine, pogoduju bagerima kašikarima i kamionima. Mala prednost u ovakvim slučajevima se može dati hidrauličnim u odnosu na užetne bagere, s obzirom da kao pogonsko gorivo mogu koristiti dizel (užetni bageri su isključivo pogonjeni električnom energijom) čime u uslovima slabe ...Mirjana V. Banković. "Optimizacija utovarno-transportnih sistema u funkciji planiranja površinskog kopa" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2018-07-13)
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Advantages and challenges in presenting mathematical content using EDX platform
... facilitate quick search and analysis of mathematical content. To date, there is no publicly available resource for mathematical content management in Serbian. 7. CONCLUSION This paper discussed OER materials in Serbian, and the open issue of their acceptance among students. Also we have analysed ...
... to presenting mathematical content within open educational platforms. The paper also assesses this course from the pedagogical and didactical points of view. Keywords: OER, edX, course, mathematics 1. INTRODUCTION At UNESCO's Forum, in 2002, Open Educational Resources (OERs) have been ...
... Jiang, Z., & Tang, Z. “The Math Retrieval System of ICST for NTCIR-12 MathIR Task”, In Proc. NTCIR-12, 2016, pp. 318-322. [11] Kohlhase, M. A. “Data Model and Encoding for a Semantic, Multilingual Terminology of Mathematics”, in Proc. International Conference on Intelligent Computer Mathematics ...Marija Radojičić, Ivan Obradović, Ranka Stanković, Olivera Kitanović, Roberto Linzalone. "Advantages and challenges in presenting mathematical content using EDX platform" in The Seventh International Conference on e-Learning (eLearning-2016), Belgrade : Metropolitan University (2016)
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Development of the Availability Concept by Using Fuzzy Theory with AHP Correction, a Case Study: Bulldozers in the Open-Pit Lignite Mine
Stevan Đenadić, Dragan Ignjatović, Miloš Tanasijević, Uglješa Bugarić, Ivan Janković, Tomislav Šubaranović (2019)Availability is one of the most used terms in maintainability engineering. This concept is used to denote: The quality of service of an engineering system, i.e., machines, weak points’ analysis, asset management, as well as making decisions in the process of life cycle management. Availability is an overall indicator and contains partial indicators that are oriented towards reliability, maintenance, and logistical support. Availability presents a variable value and changes in time and space. Usually, availability is shown as the ...... over-lapping. Fuzzy logic is used as a mathematical and conceptual model y expert systems with hybrid data. Unlike the classic crisp logic, fuzzy values are defined with membership function to proper linguistic variables [3]. The max–min composition was used, where the outcomes were defined as the mean value ...
... life cycle analysis adapt to this model, which effectively provides comparative data analysis. The model is easy to use. It can also be used for other systems, with possible corrections in the description of linguistic values. Author Contributions: Conceptualization, U.B. and S.D.; methodology, M.T ...
... evaluation option in relation to the linguistic variables, for each of the indicators (phenomena) R, M, and S. That is, the respondents could assign 100% membership to one assessment and allocate them to multiple grades. The survey covered four respondents in the open-pit mine in the “Kolubara” Mining ...Stevan Đenadić, Dragan Ignjatović, Miloš Tanasijević, Uglješa Bugarić, Ivan Janković, Tomislav Šubaranović. "Development of the Availability Concept by Using Fuzzy Theory with AHP Correction, a Case Study: Bulldozers in the Open-Pit Lignite Mine" in Energies, MDPI AG (2019). https://doi.org/10.3390/en12214044
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Data from the Digital Repository of the Faculty of Mining and Geology in eScience (eNauka)
Biljana Rujević, Mihailo Škorić (2024)The paper describes linking the Digital Repository of the University of Belgrade, Faculty of Mining and Geology, with the eScience system in terms of transferring metadata about the results of researchers' scientific work. The steps taken to ensure a smooth harvesting of metadata are outlined. Additionally, a presentation of additional improvements to the OAI system is provided, aiming to contribute to the automatic linking of authors with their results in the eScience system.Biljana Rujević, Mihailo Škorić. "Data from the Digital Repository of the Faculty of Mining and Geology in eScience (eNauka)" in Infotheca, Faculty of Philology, University of Belgrade (2024). https://doi.org/10.18485/infotheca.2023.23.2.4
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Eksploatacioni učinci ugljenih sistema na površinskom kopu Tamnava–Zapadno polje
U radu su analizirani eksploatacioni učinci ugljenih sistema na površinskom kopu Tamnava–Zapadno polje. Period analize je prvih šest meseci tekuće godine. Analiza je vršena sa aspekta ostvarene proizvodnje, kvaliteta uglja, efektivnog vremena rada, kapacitetnog i vremenskog iskoršćenja i zastoja sistema. Za poređenje podataka različitih parametara koji po svojoj prirodi nisu međusobno uporedivi, u radu su korišćene metode višekriterijumskog odlučivanja.... uglja prema otkopanoj količini proslojaka peska i gline. Slika 2.1 Odnos ostvarene proizvodnje uglja i međuslojne jalovine Na osnovu datog prikaza može se uočiti da je III BTD sistem otkopao veću količinu međuslojne jalovine nego uglja. Rad ovog sistema podrazumevao je otkopavanje većih količina jalovine ...
... odluke. Metoda se zasniva na pretpostavci da je kompromis prihvatljiv za rešavanje konflikta, da donosilac odluke želi rešenje koje je najbliže idealnom i da su alternative vrednovane prema svim postavljenim kriterijumima. Razvijena je na takvim osnovama da se donosiocu odluke predlažu alternative koje ...
... prema merama Rj, Sj i Qj. 3.2 TOPSIS metoda Metoda TOPSIS je zasnovana na konceptu da izabrana alternativa treba da ima najkraće rastojanje od idealnog rešenja, kao i najduže rastojanje od anti–idealnog rešenja. To znači da je pozitivno „idealno” rešenje sačinjeno od svih najboljih vrednosti koje se mogu ...Marko Lazić, Filip Miletić, Milena Lekić, Veljko Rupar, Željko Petrović, Lazar Žujović . "Eksploatacioni učinci ugljenih sistema na površinskom kopu Tamnava–Zapadno polje" in 10th International Conference Coal 2021, Jugoslovenski komitet za površinsku eksploataciju, Zlatibor (2021)
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A new copper(II) arsenate, Na2Cu3(AsO3OH)4·4H2O containing discrete [Cu3O12]18− units: Synthesis, crystal structure and magnetic properties
Single crystals of the new disodium tricopper(II) tetrakis(hydrogenarsenate(V)) tetrahydrate, Na2Cu3(AsO3OH)4·4H2O were grown under hydrothermal conditions. The compound was characterized by room-temperature single-crystal X-ray diffraction, SEM-EDS analysis, Raman spectroscopy and magnetic susceptibility measurements. Na2Cu3(AsO3OH)4·4H2O represents a new layered structure-type [space group P21/c, a = 8.7089(17), b = 9.7452(19), c = 9.3353(19) Å, β = 92.63(3)°, V = 791.4(3) Å3, Z = 4]. The layers are normal to [100] and are composed of the isolated Cu3O12 units interconnected by AsO3OH coordination ...Na2Cu3(AsO3OH)4•4H2O, хидротермална синтеза, кристална структура, хидрирани хидрокси-арсенати, магнетна својстваTamara Đorđević, Ljiljana Karanović, Zvonko Jagličić. "A new copper(II) arsenate, Na2Cu3(AsO3OH)4·4H2O containing discrete [Cu3O12]18− units: Synthesis, crystal structure and magnetic properties" in Journal of Solid State Chemistry, Elsevier BV (2018). https://doi.org/10.1016/j.jssc.2018.05.024
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A contribution to the understanding of hydrochemical properties of thermomineral water on the L’dži locality (eastern part of North Macedonia)
Hristina Petrova, Katarzyna Wątor, Piotr Rusiniak, Boris Vakanjac, Vesna Ristić Vakanjac, Ewa Kmiecik (2023)Regarding the aspect of mineral, thermo-mineral, and thermal waters, on the territory of the Republic of North Macedonia, there are 65 registered locations, of which 8 are categorized as spas. This includes the Kežovica spa, also known as the Štipska spa. In the vicinity of Kežovica Spa is the thermo-mineral L’Dži spring with mineralization around 1.3 g/L and the water temperature at the time of sampling was 50.1 °C. Spring L’Dži is generated by a fault structure and is ...Hristina Petrova, Katarzyna Wątor, Piotr Rusiniak, Boris Vakanjac, Vesna Ristić Vakanjac, Ewa Kmiecik. "A contribution to the understanding of hydrochemical properties of thermomineral water on the L’dži locality (eastern part of North Macedonia)" in National Conference with International Participation “GEOSCIENCES 2023”, Review of the Bulgarian Geological Society, Sofia : Bulgarian Geological Society (2023)
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Towards Better Valorisation of Industrial Minerals andRocks in Serbia—Case Study of Industrial Clays
... Orljak Small Good Open pit 1 (up to 8.5) 10 Beretnica Small Good Open pit 1 (oko 3) At surface Dubrava Small Good Open pit 1 (do 9) Up to 10 Umište Medium Low Open pit 1 (1,5–12,5) At surface 2. Bentonitic clay Rovine-Potočić Large Low Open pit 1 (>20) Up to 4 Gušica Large Low Open pit 1 (>50) 1–30 ...
... Large Unexplored Open pit Several (0.1–1.5) In coal seam Bogovina Medium Unexplored Underground 1 (?) ? Valja Saka Medium Medium Underground 2 (0.5–15.0) 40–95 Bivolica Large Medium Open pit 1 (2–30) At surface Jelenkovac Medium Medium Open pit 1 (4) Up to 40 Mečji do Small Good Open pit 1 (10) Up ...
... and vicinity of populated areas). The total procedure to obtain all permits related to exploration is usually 1–6 months depend- ing on required data. All data on protected areas are available online [64]. For the land use changes necessary for exploitation of a mineral deposit two manda- tory docum ...Vladimir Simić, Dragana Životić, Zoran Miladinović. "Towards Better Valorisation of Industrial Minerals andRocks in Serbia—Case Study of Industrial Clays" in Resources, MDPI AG (2021). https://doi.org/10.3390/resources10060063
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Rangiranja bagera za njihovu revitalizaciju primenom višekriterijumske analize
Obzirom da je na našim površinskim kopovima trenutno u eksploataciji veći broj rotornih bagera sa sličnim tehničkim karakteristikama i približno istom starošću postavlja se pitanje kako rangirati bagere, i kojim redom da se izvrši njihova revitalizacija. Za ocenu stanja i rangiranje ovako velikog broja bagera najpogodnije se pokazalo korišćenje višekriterijumskih metoda sa višeatributnom ocenom, odnosno bodovanje referentnih indikatora stanja bagera na osnovu ekspertske ocene. U ovom radu prikazan je metodološki pristup koji je korišćen prilikom izrade Studije «Produžetak radnog ...... 7, 11000 Beograd Sažetak: Obzirom da je na našim površinskim kopovima trenutno u eksploataciji veći broj rotornih bagera sa sličnim tehničkim karakteristikama i približno istom starošću postavlja se pitanje kako rangirati bagere, i kojim redom da se izvrši njihova revitalizacija. Za ocenu ...
... postavlja pitanje kako rangirati ove bagere, odnosno kojim redom da se izvrši njihova revitalizacija, tj. produžetak radnog veka. Ulazak u remont radi revitalizacije i modernizacije zasniva se na proceni tehničkog stanja bagera, tako da je pre početka revitalizacije neophodno izvršiti brojna i detaljanja ...
... konačnih numeričkih ocena. U Tabeli 3 date su konačne numeričke ocene i rang lista bagera za vrednosti atributa iz Tabele 1 i zadate težinske faktore pλ iz Tabele 2. Kao što se vidi iz tabele 3 bager pod rednim brojem četiri ima najslabiju ocenu i stoga se predlaže se da ovaj bager prvi uđe u pripremne ...Ivan Obradović, Dragan Ignjatović, Ranka Stanković, Ljiljana Ivković. "Rangiranja bagera za njihovu revitalizaciju primenom višekriterijumske analize" in MAREN 2006, Međunarodni simpozijum Mehanizacija i automatizacija u rudarstvu i energetika, zbornik radova, septembar 2006, Beograd, Univerzitet u Beogradu-Rudarsko-geološki fakultet (2006)
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Demise of the Wetterstein Carbonate Platform and onset of the Dachstein Carbonate Platform recorded in deep-water successions of the East Bosnian-Durmitor megaunit (Pliješevina, northern Montenegro, Dinarides)
Milica Mrdak, Eva Wagerer, Milan Sudar, Nevenka Djerić, Martin Đaković, Hans-Jürgen Gawlick. "Demise of the Wetterstein Carbonate Platform and onset of the Dachstein Carbonate Platform recorded in deep-water successions of the East Bosnian-Durmitor megaunit (Pliješevina, northern Montenegro, Dinarides)" in Geologica Carpathica, Central Library of the Slovak Academy of Sciences (2024). https://doi.org/10.31577/GeolCarp.2023.26
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Primena digitalne fotogrametrije u rudniku Rudnik
Digitalna fotogrametrija, lasersko skeniranje i virtuelizacija sve više pronalaze aktivne uloge u rudarstvu, prvenstveno zbog svoje široke mogućnosti primene. Laserskim skeniranjem i fotogrametrijom snimaju se i kreiraju 3D modeli otkopa, jamskih hodnika, površinskih kopova, površinskih objekata (zgrada, spomenika, predmeta), a vrši se skeniranje celih rudnika koji se rekonstruišu u 3D digitalne modele. Fotogrametrija predstavlja proces fotografisanja objekata pomoću fotoaparata i daljom obradom fotografija u različitim softverskim alatima kreiraju se realne kopije 3D modela objekata ili predmeta u digitalnoj formi. Za ...... digitalne modele. Oblaci tačaka nastaju preklapanjem fotografija i da bi se dobio što realniji model potrebno je da preklapanje slika bude od 60% pa naviše, mada u nekim slučajevima mogu da se dobiju modeli i sa manjim procentom preklapanja. Da bi preklapanje bilo što približnije mogu se postaviti markeri ...
... prošao kroz glinovitu radnu sredinu i usled bubrenja je počeo da utanja usled izloženosti velikoj vrednosti podzemnog pritiska. Probojnom podgradom pokušano je da se stabilizuje deo hodnika, ali pritisci su toliko veliki da je i ona počela da popušta. Probojnu podgradu u ovom primeru čini kombinacija ...
... modela fotogrametrijom treba imati u vidu da voda dosta utiče na kvalitet modela i to na način da delovi modela na kome ima vode obično budu prikazani kao šupljine, kao što se može videti na donjoj levoj strani hodnika. Jedini 3D model koji je napravljen, a da se nalazio na površini, prikazan je na ...Nikola Mirković, Luka Crnogorac, Katarina Urošević. "Primena digitalne fotogrametrije u rudniku Rudnik" in XI Međunarodna konferencija ugalj i kritični minerali CCM 2023, Zlatibor, 11-14. oktobar 2023., Beograd : Jugoslovenski komitet za površinsku eksploataciju (2023)
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An Approach to Management Decision Support: The Coal Mine Pljevlja Management Information System
In this paper we describe the approach that has been used in the development of the Management Information System (MIS) in the Coal Mine Pljevlja in Montenegro. The methodology of this approach was based on new information technologies and management techniques which have already been successfully applied in other related fields. Its main goal was to introduce modern management techniques to mining, adapted to specific features of the mining industry, its operations and environment, thus enabling the tactical management ...... Consolidation involves the aggregation of data. This can involve simple roll-ups or complex grouping involving interrelated data. For example, production by each production unit can be rolled up to production by type of equipment and further can be rolled up to open pit, or the whole mine, aggregated ...
... e-mine. This figure shows two open pits, but if new sites and production complexes are opened, they can also be included in the system. Figure 1. Architecture of TIS for Coal Mine Pljevlja 2.1 Human resources The human resources system enables monitoring of data of an employee, starting from ...
... out by regular data input, in order to make data electronically registered in real time and presented for inspection, to help production process management and periodical reporting. All production capacities in the technological chain of production are defined on basis of data on equipment and ...Božo Kolonja, Ranka Stanković, Filip Vuković, Ivan Obradović. "An Approach to Management Decision Support: The Coal Mine Pljevlja Management Information System" in Proceedings of the Fifteenth International Symposium on Mine Planning and Equipment Selection, Torino, Italy, September 2006, Vol. 1,, Balkema (2006)
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Early–Middle Jurassic brachiopods from Ponor Mountain, Western Balkan Mountains, Bulgaria; taxonomy, biostratigraphy and occurrence in the context of the early Toarcian Oceanic Anoxic Event
Barbara V. Radulović, Lubomir S. Metodiev, Neda Motchurova-Dekova, Platon Tchoumatchenco. "Early–Middle Jurassic brachiopods from Ponor Mountain, Western Balkan Mountains, Bulgaria; taxonomy, biostratigraphy and occurrence in the context of the early Toarcian Oceanic Anoxic Event" in Historical Biology (2023). https://doi.org/10.1080/08912963.2023.2190757
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KINDRA project – knowledge inventory for hydrogeology research
Vesna Ristić Vakanjac, Zoran Stevanović, Bojan Hajdin, Marina Čokorilo Ilić, Veljko Marinović (2017)Vesna Ristić Vakanjac, Zoran Stevanović, Bojan Hajdin, Marina Čokorilo Ilić, Veljko Marinović. "KINDRA project – knowledge inventory for hydrogeology research" in Proceedings of the national conference with international participation „Geosciences 2017“, Sofia, Bulgaria, 07-08 December, 2017, Sofia : Bulgarian Geological Society (2017)
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Развој геолошког терминолошког речника ГеолИССТерм
... the terms are: hypernym and hyp- onym that can also be viewed as the broader and the narrower term respectively. The terms in the hierarchy are linked via the is a relation which can be: • The hyponym of the same type as the hy- pernym • The hyponym is part of the hypernym • The hyponym is an ...
... is inherited by other classes in the model. The Domain class is where all the data necessary for a description of some domain are registered: whether it is a list or a hierarchical tree, from which dictionary the data are taken: geologic, administrative, numerical (in which case there is an allowed ...
... Software solution The application was developed using mS vi- sual Studio and the programming languages c# and Aspx, while the data were stored in the mS SQl Server 2008 data management system. This section features a brief description of the compo- nents of the software solution which consists of ...Ranka Stanković, Branislav Trivić, Olivera Kitanović, Branislav Blagojević, Velizar Nikolić. "Развој геолошког терминолошког речника ГеолИССТерм" in INFOteka: časopis za informatiku i bibliotekarstvo, Beograd : Zajednica biblioteka univerziteta u Srbiji (2011)
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Regional rockfall exposure assessment, experience from Serbia
Rockfalls are common in hilly and mountainous areas, especially along roads with engineered slopes and cuts. Such is the case for most of the state and local road routes in Central, Serbia, which was the subject in this case study. A road network of 276 km covering roughly 1700 km2 between the cities of Kraljevo, Čačak and Ivanjica is presented. Assessing of such wide areas needs to be conducted from large to site-specific scale, i.e., using GIS spatial tools ...Miloš Marjanović, Biljana Abolmasov, Uroš Đurić, Jelka Krušić, Snežana Bogdanović. "Regional rockfall exposure assessment, experience from Serbia" in 5th Regional symposium on landslides in Adriatic–Balkan Region, 23-26 March 2022, Faculty of Civil Engineering, University of Rijeka and Faculty of Mining, Geology and Petroleum Engineering, University of Zagreb (2022)
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Gornjomiocenski laporci Panonskog jezera na površinskom kopu Filijala (Beočin, severna Srbija) - novi geološki i paleomagnetni podaci
Ganić Meri, Rundić Ljupko, Knežević Slobodan, Cvetkov Vesna. "Gornjomiocenski laporci Panonskog jezera na površinskom kopu Filijala (Beočin, severna Srbija) - novi geološki i paleomagnetni podaci" in Geološki anali Balkanskoga poluostrva no. 71, Beograd:Rudarsko-geološki fakultet (2010): 95-108
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Age of the Jurassic hemipelagic sediments from the Ljubiš area (Zlatibor Mt., SW Serbia)
Nikita Bragin, Nevenka Đerić (2020)... assemblage is compatible with UAZs 3 to 6, covering the time span from the Bajocian to the Bathonian. As some taxa were determined in open nomenclature and their data adequacy is relatively low, we can conclude that the lower part of the Ljubiš Formation has a Middle Jurassic, ?Bajo cian to Bathonian ...
... lines show the stratigraphic ranges of taxa determined in open nomenclature and taxa for which the stratigraphic range needs more detailed study. Stratigraphic ranges were attributed according to BAUMGARTNER et al. (1995b) with additional data from SUZUKI & GAWLICK (2009) and GAWLICK et al. (2009). ...
... (YAO), H. tetraspinus (YAO). Taking into account previous data from the upper part of the Ljubiš Formation, the age of the formation can be estimated to be in the interval from the ?Bajocian to Bathonian-Oxfordian. The new biostratigraphic data clearly show the onset of tectonic motion in the Middle ...Nikita Bragin, Nevenka Đerić. "Age of the Jurassic hemipelagic sediments from the Ljubiš area (Zlatibor Mt., SW Serbia)" in Geologia Croatica, Croatian Geological Survey (2020). https://doi.org/10.4154/gc.2020.11
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Development of A Business Intelligence Tool For Accident Analysis in Mines
... ased tool in improvement of the analysis and reporting system with easy data access and query for users in mine safety area. We have demonstrated various possibilities that the use of such a business intelligence tool open, supported by a practical example of application of the tool for accident ...
... the entrepreneurial community. However, BI is more focused on decision making using data warehousing and online analytical processing (OLAP) techniques, where data warehousing pertains to collecting relevant data into a repository, where it is organized and validated for decision-making purposes ...
... perform their multi- dimensional analysis, as well as display data in different forms. Data are presented in the form of OLAP cubes that contains measures and dimensions. Compared with the standard representations of business data, dimensions are business parameters represented as row and column ...Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Uroš Pantelić. "Development of A Business Intelligence Tool For Accident Analysis in Mines" in Proceedings of the 5th International Symposium Mining And Environmental Protection, June 10-13, 2015, Vrdnik, Serbia, Belgrade : Faculty of Mining and Geology (2015)
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Production information system of the Pljevlja coal mine
Božo Kolonja, Ranka Stanković, Filip Vuković . "Production information system of the Pljevlja coal mine" in Mine Planning and Equipment Selection 2000, Routledge (2018). https://doi.org/10.1201/9780203747124-154