Претрага

Упит dcterms_subject_txt:open pit

225 items

  • 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 ...
    raspoloživost, fazi teorija, AHP višekriterijumska analiza, eksperska ocena, buldozer
    ... Bulldozers This paper presents a case study for defining the availability of bulldozers in EPS open-pit lignite mines. One of the basic prerequisites for the successful operation of basic mechanization in open-pit mining with continuous systems is to carry out all necessary auxiliary works on time (cleaning ...
    ... and spreaders) has been demonstrated. In case of low availability, the open-pit mine must have a larger number of units or there will not be enough machines for operation. In the structure and extent of auxiliary works in open-pit mines, the most commonly used earthworks are those which are performed ...
    ... publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs energies Article Development of the Availability Concept by Using Fuzzy Theory with AHP Correction, a Case Study: Bulldozers in the Open-Pit Lignite Mine Stevan Djenadic ...

  • Optimizacija površinskog kopa Ciganuša – Škorac

    Vasilije Zejak (2024)
    U radu se govori o značaju optimizacije u savremenom rudarstvu i kako nam to softveri štede vreme, novac i olakšavaju procese planiranja.Konkretno u izradi ovog rada korišćen je softverski paket Whittle.Da bi se optimizacije mogla uspešno sprovesti, potrebno je konstruisati pre svega blok model ležišta kao i definisati niz tehno – ekonomskih parametara. Na osnovu tih podataka definiše se optimalna kontura i dinamika razvoja radova. U skladu sa definisanim podaci i odgovarajućim podlogama definisana je optimalna kontura površinskog kopa Ciganuša ...
    optimizacija, površinski kop Ciganuša - Škorac, blok model, strateško planiranje, optimalna kontura, dinamika razvoja, fazni razvoj
    ... .. + Li||[Hti -80000000 1+4000000D ı -120000000+fH Pit \/alue Tonnage # Open pitvalue for Best Case -Tonnage inputto processing for Best Case. % Discounted open pitvalue for Best Case. DTonnage ofwaste rock. MiDiscounted open pitvalue forWorst Case. Slika 3.31 Prednosti NPPI-a za worst ...
    ... Estimation. Snowden Mining Industry Consultants. 4. Dagdelen, K. (1985). Optimum multi period open pit mine production scheduling. Golden Colorado: ProQuest LLC. 5. Dagdelen, K. (2001). Open Pit Optimization - Strategies for Improving Economics of Mining. International Mining Congress and ...
    ... Stevanović, Božo Kolonja. (2005). Projektovanje površinskih kopova (interna skripta). Beograd. 8. Dowd P. A., Onur A.H. (1993). Open-pit optimization - part 1: Optimal open- pit design. Trans. Inst. Min. Metall. 1993,102, A95-A104. 9. Githiria J. (2016). Cut-off grade optimisation to maximise the net ...

  • Uticaj geološke neizvesnosti u razvoju rudarskih projekata

    Petar Marković, Dejan Stevanović, Mirjana Banković (2023)
    Rudarstvo je industrija koja se nosi sa različitim vrstama neizvesnosti i rizika zbog svoje prirode i specifičnosti. Neizvesnost u rudarstvu može poticati iz različitih izvora i uticati na različite aspekte rudarskih projekata. Kao jedan od dominantnih faktora, ističe se geološka neizvesnost. Geološka neizvesnost igra ključnu ulogu u rudarstvu i može značajno uticati na procenu resursa i rezervi, planiranje eksploatacije, ekonomsku isplativost i upravljanje rizicima. Ova neizvesnost se ne može eliminisati, ali se uz primenu adekvatnih standarda i zakona može ...
    ... 445-464. [9] G. Lagos et al. (2011). Robust planning for an open-pit mining problem under ore-grade uncertainty. Electronic Notes in Discrete Mathematics , 31, 15-20. [10] Goodfellow R., Dimitrakopoulos R. (2016). Global optimization of open pit mining complexes with uncertainty. Applied Soft Computing ...
    ... posledično i za rudarsku praksu, posebno bitno, uskladiti važeće zakone sa pravilnicima. 91 Literatura [1] Armstrong M. et al. (2021). Adaptive open-pit mining planning under geological uncertainty. Resources Policy , 72. [2] (2012). Australasian Code for Reporting of Exploration Results, Mineral ...
    ... Dimitrakopoulos, R., Farrelly, C. T., and Cheuiche Godoy, M. (2002). Moving forward from traditional optimization: Grade uncertainty and risk effects in open-pit design. Transactions of the Institution of Mining and Metallurgy , 3, 82-88. [7] Edwards A.C. (2001). Mineral resource and ore reserve estimation ...

  • Towards Better Valorisation of Industrial Minerals andRocks in Serbia—Case Study of Industrial Clays

    Vladimir Simić, Dragana Životić, Zoran Miladinović (2021)
    Management, Monitoring, Policy and Law,Nature and Landscape Conservation
    ... 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 ...
    ... 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 to ...
    ... 1–30 Jerli Sadovina Large Low Open pit 1 (8) 8 3.2. Actual Geological Exploration of Industrial Clays in Serbia Actual geological exploration and reporting standards in Serbia are still a derivation of the older, non-CRIRSCO-aligned Soviet state system. The example of clay rocks is used to presents ...

  • Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit

    Suzana Lutovac, Nebojša Vidanović, Čedomir Beljić, Zoran Gligorić (2015)
    ... “Kovilovača“ open pit Suzana Lutovac, Nebojša Vidanović, Čedomir Beljić, Zoran Gligorić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit | Suzana Lutovac ...
    ... the functional cor- relation is accepted as a good one. 4 REVIEW OF MASSIVE BLASTING AT THE “KOVILOVAČA“ OPEN PIT - DESPOTOVAC 4.1 General characteristics of the “Kovilovača" open pit The “Kovilovača“ limestone deposits have an exceptionally simple geological structure. Limestones of this ...
    ... Tokalić R.; (2008): Analysis of the Soil Oscillation Law in the Example of the Open Pit „Kovilovača“, Podzemni radovi No.16, pp. 47-56, December 2008, RGF Belgrade. [10] Savić M., (2000): Blasting at the Open Pits, Monograph, RTB Bor, Copper Institute Bor, Indok Center, Bor, pp. 317, (In ...

  • Optimizacija i planiranje površinskih kopova stohastičkim modelima

    Dejan R. Stevanović (2015-05-29)
    Savremeno rudarstvo izloženo je stalnom trendu pogoršanja uslova poslovanja.Mogućnost ostvarenja ekonomskih i drugih ciljeva rudarskog projektakompromitovana je stalnim pogoršanjem kvaliteta ležišta na kojima se vršieksploatacija, kao i značajnoj dozi neizvesnosti povezane sa geološkim,ekonomskim i tehničkim parametrima proizvodnje. U ovako kompleksnimuslovima poslovanja, matematički modeli sposobni da odgovore značajnimizazovima, odnosno ponude optimalna rešenja kojima se garantuje maksimalnoispunjenje projektovanih ciljeva, nameću se kao neophodnost.Trenutni, konvencionalni pristup optimizaciji i planiranju površinskih kopovazasniva se na algoritmima, razvijenim sredinom prošlog veka čije je opšteobeležje deterministički ...
    površinski kop, planiranje, optimizacija, stohastički modeli, kontrola kvaliteta uglja, neizvesnost.
    ... of production planning on the lignite open pit. Second model that is being developed is hybrid type. It has stochastic (Monte Carlo method) and deterministic component and treats the problem of optimization of open pit boundaries. Keywords: open pit mine, planning, optimization, stochastic ...
    ... n of waste transportation system for open pit Buvač, Tehnika, Beograd Mario, J. M, Salma, J, P, 1973, Ore Reserve Education and Open Pit Planning, X-ti APCOM, Johanesburg, South Africa Martinez, L. A. 2003. Can quantification of geological risk improve open pit mine design? MPhil, In Academic. Dep ...
    ... Optimum Design of Open Pit, X-ti APCOM, Johanesburg, South Africa Pit Optomizer, Surpaca 6.1, Dassalt Systems-Geovia, dostupno na adresi:http://www.gemcomsoftware.com/products/Surpac, pristupljeno adresi 08 marta 2013. Pitkanen, P, 1997, Open Pit Optimization, Calculating the Optimum Pit Limits, Helsinki ...

  • Open Educational Resources in Serbia

    Ivan Obradović, Ranka Stanković, Marija Blagojević, Danijela Milošević (2020)
    Open educational resources, BAEKTEL, Metadata portal
    ... provides a review of open educational resources in Serbia. It covers different aspects of open educational resources: policy, resources, licenses, curriculum and teaching methodology, outcome, stakeholders and impact. All mentioned aspects give an overview of the current state of open educational resources ...
    ... different regulations and various types of information about open education resources. The aim of the portal of the Open Education Initiative is to contribute to the inclusion of Serbia’s educational space in European and global trends in open education. Several university teachers have already made ...
    ... of machine readability. Adopted institutional policies of open science and institutions that have adopted institutional policies are listed. Guidelines, dictionaries and various types of methodologies related to open science and open data are briefly published. Among repositories that are ...

  • Managing mining project documentation using human language technology

    Aleksandra Tomašević, Ranka Stanković, Miloš Utvić, Ivan Obradović, Božo Kolonja (2018)
    Purpose: This paper aims to develop a system, which would enable efficient management and exploitation of documentation in electronic form, related to mining projects, with information retrieval and information extraction (IE) features, using various language resources and natural language processing. Design/methodology/approach: The system is designed to integrate textual, lexical, semantic and terminological resources, enabling advanced document search and extraction of information. These resources are integrated with a set of Web services and applications, for different user profiles and use-cases. Findings: The ...
    Digital libraries, Information retrieval, Data mining, Human language technologies, Project documentation

  • 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
    ... shovel-truck system in open pit mines. International Journal of Surface Mining, Reclamation and Environment, 6 (2), 57-59. Dagdelen, K., 1985, Optimum multi period open pit mine production scheduling. PhD Thesis, Colorado School of Mines. Dagdelen, K., 1986, Optimum open pit mine production scheduling ...
    ... Grossmann, 1965, Optimum design of open pit mines. Transactions CIM Bullitin, Vol. 58, 17-24. Li, Z., 1995, Truck-haulage economics of mining open pits by high bench. CIM bulletin, 88, 50-52. 200 Lizotte, Y., 1988, Economic and technical relations between open-pit design and equipment selection. ...
    ... Hall, R., Morin, M., 2005, Equipment size effects on open pit mining performance. International Journal of Surface Mining, Reclamation and Environment, 19 (1), 41-56. Bozorgebrahimi, E., 2004, The evaluation of haulage truck size effects on open pit mining, PhD Thesis, University of British Columbia. ...

  • Analiza primene višekriterijumskih metoda u optimizaciji izbora hidruličnih bagera na površinskim kopovima uglja

    Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Filip Miletić, Ivan Janković (2019)
    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. ...
    višekriterijumske metode, površinski kop uglja, pomoćna mehanizacija, hidraulični bager
    ... 021, 2010. [8] Bescetin A, A decision support system using analy- tical hierarchy process (AHP) for the optimal envoi- rmental reclamation of an open-pit mine. Eviron- mental Geology, 52, pp. 663-672. 2007. [9] Mohamadibadi H S, Tichkowsky G, Kumar, A. De- velopment of a Multi-Criteria Assessment ...
    ... SELECTION OF HYDRAULIC EXCAVATORS ON OPEN-CAST 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 ...
    ... 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.rgf.bg.ac.rs S. ĐENADIĆ i dr. ANALIZA PRIMENE VIŠEKRITERIJUMSKIH ...

  • Merenje mase iskopanog uglja na površinskim kopovima

    Snežana Aleksandrović (2015)

  • Application of the VIKOR Method for Selecting the Purpose of Recultivated Terrain after the End of Coal Mining

    Radmila Gaćina, Sanja Bajić, Bojan Dimitrijević, Tomislav Šubaranović, Čedomir Beljić, Dragoljub Bajić (2024)
    reclamation, coal, sustainable development, multi-criteria decision making, VIKOR method

  • Implementataion of the modern technologies in order to control the drilling an blasting works

    Miljan Gomilanović, Stefan Milanović, Nikola Stanić, Aleksandar Doderović, Nikola Simić (2018)
    U ovom radu prikazanе su mogućnosti primene savremenih tehnologija u oblasti bušenja i miniranja pri površinskoj eksploataciji ležišta mineralnih sirovina, problemi koji se javljaju prilikom izvođenja radova, kao i moguća rešenja i prednosti primene ovih tehnologija.
    bušenje, miniranje, dron

  • Eksploatacioni učinci ugljenih sistema na površinskom kopu Tamnava–Zapadno polje

    Marko Lazić, Filip Miletić, Milena Lekić, Veljko Rupar, Željko Petrović, Lazar Žujović (2021)
    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.
    proizvodnja uglja, zastoji, metode višekriterijumskog odlučivanja
    ... Eksploatacioni učinci ugljenih sistema na površinskom kopu Tamnava–Zapadno polje Exploatation effects of coal systems on the open pit mine Tamnava–West field Marko Lazić[footnoteRef:1], Filip Miletić[footnoteRef:2], Milena Lekić2, Veljko Rupar2, Željko Petrović[footnoteRef:3], Lazar ...
    ... uporedivi, u radu su korišćene metode višekriterijumskog odlučivanja. Abstract: This paper analyzed the exploitation effects of coal systems at the open–pit mine Tamnava–West field for the first six months of the current year. The analysis was performed in the aspect of reached production, coal quality ...
    ... mining and mineral processing: Applications and trends. Expert [8] Bazzazi, A. A., Osanloo, M., & Karimi, B. (2011). Deriving preference order of open pit mines equipment through MADM methods: Application of modified VIKOR method. Expert Systems with Applications, 38(3), 2550-2556;Systems with Applications ...

  • Model za optimizaciju graničnog saržaja metala u rudi u funkciji dugoročnog planiranja površinskih kopova

    Daniel P. Kržanović (2016-06-14)
    Optimizacija graničnog sadržaja metala u rudi jedan je od osnovnih koraka u planiranju i dizajniranju površinskih kopova i ima za cilj postizanje maksimalne neto sadašnje vrednosti (NPV). Iz tog razloga, optimizacija graničnog sadržaja i danas je predmet mnogih istraživanja u rudarskoj nauci, sa ciljem rešavanja praktičnih problema u eksploataciji ležišta.Dugoročno planiranje eksploatacije na površinskim kopovima podrazumeva sagledavanje svih relevantih parametara i faktora (geologije rudnog ležišta, tehnologije proizvodnog procesa, kapaciteta otkopavanja i prerade, troškova, cena metala, iskorišćenja i dr) kako ...
    površinski kop, dugoročno planiranje, optimizacija graničnog sadržaja, maksimizacija neto sadašnje vrednosti (NPV).
    ... of an Open Pit Mine, Discrete Applied Mathematics, Vol. 21, pp. 1–19. Caccetta, L., Hill, S.P., 2003, An Application of Branch and Cut to Open Pit Mine Scheduling,. Journal of Global Optimization, vol. 27, pp. 349 – 365. Caccetta, L., Hill, S.P., 1999, Optimization Techniques For Open Pit Mine ...
    ... 64-67. Dowd, P.A., Onur, A.H., 1992, Optimizing open pit design and sequencing, Proceedings of 23rd APCOM symp., Tucson, Arizona, pp. 411 – 422. Dowd, P.A., Onur, A.H., 1993, Optimization of Open-pit Mine Design-Part 1: Optimal Open-pit Design, Transactions of the Institute of Mining and ...
    ... Hustrulid, W., Kuchta, M., 1995, Open pit mine planning and design, Balkema, Rottherdam, pp. 427-442. Hustrulid, W., Kuchta, M., 1998, Open Pit Mine Planning and Design, A.A. Balkema, Rotterdam, Netherlands, vol. 1, ISBN 9054101814. Hustrulid, W., Kuchta, M., 2006, Open Pit Mine Planning and Design – ...

  • An intelligent hybrid system for surface coal mine safety analysis

    Nikola Lilić, Ivan Obradović, Aleksandar Cvjetić (2010)

  • A Fuzzy Expert Model for Availability Evaluation

    Dejan Ivezić, Miloš Tanasijević, Predrag Jovančić, Radiša Đurić (2019)
    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 ...
    raspoloživost, ekspertski sistem, fazi teorija, buldozeri
    ... bulldozers that operate to three different open pit mines in Serbia was evaluated using the proposed expert model. Machines were compared individually (selected machine at selected open pit mine), but also integral comparisons between machines and open pit mines were made. Obtain results should be ...
    ... AVAILABILITY INDICATORS A n a ly st N o . A v a il a b il it y in d ic a to r Questionnaire: Bulldozer Liebherr – Drmno Open Pit Mine Grade: Excellent Good Average Adequate Poor The degree of affiliation, % 1 R 40 60 M 100 S 100 2 R 20 80 M 100 ...
    ... be used for the improvement of maintenance and logistic support at open pit mines, as well as an important parameter during the further purchase of this type of machines. Since the models based on experts’ opinions in principle carry a dose of subjectivity, the presented model and obtained results ...

  • Environmental Noise Impact Assessment for Large-Scale Surface Mining Operations in Serbia

    Uros Pantelic, Petar Lilic, Aleksandar Cvjetic, Nikola Lilic (2023)
    Noise emissions are a significant environmental impact caused by the mining industry in all technological phases of surface mining, mineral processing, and waste disposal. This paper presents the role of noise impact assessment and control in large-scale surface mining operations. Mine planning develops the model of mining operations, ore excavation, and waste dumping scheduling and processing rates, including spatial distribution of mining activities. Such a level of mine planning requires an environmental impact assessment study. This can be achieved ...
    mine planning, noise impact assessment, mining, noise mapping, environmental impact assessment

  • Razvoj integralnog modela za optimizaciju diskontinualnog sistema proizvodnje na površinskim kopovima nemetala

    Miodrag Čelebić (2024)
    Izbor optimalne mehanizacije u diskontinualnom sistemu transporta je jedna od najvažnijih odluka koju treba donijeti prilikom projektovanja površinskih kopova. Pri izboru optimalne mehanizacije, uticaj ima veliki broj faktora, kako prirodnih – geoloških i ekoloških, tako i tehničkih, ekonomskih i socijanih. Neki od njih se mogu izraziti numerički, u određenim mijernim jedinicama, a neki opisno, lingvističkim varijablama, shodno uslovima koji vladaju na rudnim ležištima, a koje karakterišu visok stepen neizvjesnosti i neodređenosti kako prilikom istraživanja, tako i tokom procesa eksploatacije ...
    izbor mehanizacije, tehnologija eksploatacije, diskontinualani sistem, ekspertsko odlučivanje, lingvističke varijable, MCDM, FAHP

  • Quantitative landslide risk assessment in the city of Tuzla

    Miloš Marjanović, Biljana Abolmasov, Cvjetko Sandić, Miralem Mulać, Petar Begović (2021)
    In the climate-changing conditions, geological environment interacts more dramatically with the urban fabric than before. The urbanization is expansive and more aggressive than before, but so are the weather extremes and long-term climate trends. In effect, many processes which can be triggered by either side, nature or engineering, are becoming more pervasive than before, and such is the case with landslides. Dealing and managing landslides requires few crucial steps, starting from collecting data on landslide location and typology – ...
    "landslides", "risk assessment"
    ... Tuzla in Bosnia and Herzegovina, which is known for instabilities due to rugged steep slopes, but also destabilizing effects of underground and open pit mining, which has a long tradition in Tuzla. However, the main motive for considering this case study lies in severe landslidng episode triggered ...
    ... Tuzla in BiH spreads over approximately 294 km 2 of mostly rugged and steep hilly terrain (Fig. 2). The city is known for its underground and open pit mining tradition, but also suffers from related ground instabilities (especially subsidence), but the actual motivation for a detailed study was ...
    ... aggregation into dummy variables was followed. Distance to mining sites was calculated to depict disturbed zones, since mining in Tuzla region includes open pit coal and underground salt mining. Both mining types can affect stability by causing subsidence (m order of magnitude) or producing waste deposits ...