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Упит dcterms_subject_txt:maintenance operations

149 items

  • Development of A Business Intelligence Tool For Accident Analysis in Mines

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Uroš Pantelić (2015)
    ... ICT support systems and tools have been developed and implemented, such as diagnostic and prognostic decision support systems, computerized maintenance management systems (CMMS) and enterprise resource planning systems (ERP). Similar to other engineering disciplines the application of ICT in ...
    ... analyst’s queries, so that their analytical or decision-making process is undisturbed. Online analytical processing involves several basic analytical operations, including consolidation, “drill- down” and “slicing and dicing” (Kolonja et al, 2006). In mine safety it is necessary to follow several attributes ...

  • 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
    ... process. Mining Technology, 111(2), 136-142; [5] Basçetin, A. (2009). The study of decision making tools for equipment selection in mining engineering operations. Gospodarka Surowcami Mineralnymi – Mineral Resource Management, 25, 37-56; [6] Hwang, C. L., & Yoon, K. (1981). Methods for multiple attribute decision ...

  • Conversion of land areas after coal mine closure and reclamation

    Radmila Gaćina, Bojan Dimitrijević, Sanja Bajić (2023)
    Otkopavanje uglja površinski i podzemno praćeno je degradacijom zemljišta, promenom formiranja predela i izmenom flore i faune. Od velikog značaja je razvoj novih naučno utemeljenih pristupa obnovljanje antropogeno poremećenih predela zasnovanih na formiranju rekultivacionih i rudarskih tehnologija. Apsolutno je neophodno obezbediti sveobuhvatno kvalitetno očuvanje zemljišnih i vodnih resursa i odrediti rekultivisano zemljište za novu namenu. U ovom članku je dat pregled najpopularnijih metoda rekultivacije zemljišta i mogućnosti rekultivacije zemljišta nakon završetka rekultivacije i zatvaranja rudnika uglja.
    rekultivacija, melioracija, revitalizacija, otkopavanje uglja, održivi razvoj
    ... KI The amount of investments per unit of area x K2 Investment period - investment time x K3 Time of return of invested funds x K4 Annual maintenance costs per unit surface x K5 Adaptability of the recultivation solution to the environment X Ko Local needs (local community interest) X K7 ...
    ... complexity of carrying out reclamation works X KIO Organizational complexity of the execution recultivation X KII Post reclamation continuous maintenance time x JInterpretation: D - Deterministic, E - Expositive, x – no alternative, x – alternatively (preferably), X — alternatively (necessarily) ...
    ... energy projects is very attractive for the mine”s post-closure phase. Coal mining concession areas are generally larger than the mined area. Mining operations expand progressively during the operation lifecycle of the coal mine and portions of the site can be used for renewable power production. The ...

  • Application of stochastic models for mine planning and coal quality control

    Dejan Stevanović, Božo Kolonja, Ranka Stanković, Dinko Knežević, Mirjana Banković (2014)
    ... utilities operated, coal was viewed as a necessary evil and was always treated as a “pass through” cost. Although the quality of coal impacts boiler operations and subsequent power produced and emissions, utilities had no economic interest in monitoring or managing coal quality. It is preferred that feeds ...
    ... mine. Proper operational planning must conform to short term mine plans as well as satisfying many practical details that are unique to day to day operations. Grade control problems are usually in- corporated in the operational planning provided that the necessary detail information is known in advance ...

  • Процена емисије гасова са ефектом стаклене баште као последице енергетске активности

    Горана Остојић (2024)
    Рад се бави анализом и проценом емисија гасова са ефектом стаклене баште, са посебним акцентом на емисије које настају као последица енергетских активности. Ефекат стаклене баште представља природни процес који је неопходан за одржавање живота на Земљи, али антропогене активности, попут индустријске производње и сагоревања фосилних горива, значајно повећавају концентрацију ових гасова у атмосфери, што доводи до климатских промена. Рад истражује узроке, последице и могућности за смањење емисија гасова, као и развој стратегија за ублажавање негативних ефеката на животну ...
    емисија гасова, ефекат стаклене баште, енергетске активности, климатске промене, мобилно сагоревање, стационарно сагоревање
    ... delivered within that country but used by the militaries of other countries that are not cngaged in muhltilateral operations., -lu - m'g W w NE Emissions from fucls used in multilateral operations pursuant to the Chatter ofthe United Nations. Include emisstons fom fuel deli vered to the military in the ...
    ... fhat country but used by the militaries of other countries that are not engaged in. Multilaieral operations. Emissxns from fucls used for aviatkon and water- borne navigation in muhilateral operations pursuant to the Charter of fwe United Natkwns. Include emissions from fucl delivered to the military ...
    ... Military transport should bc reported under | A 5 (see | A S Non-specified), 'Combustion related emissons from the operaton of pump stations amd maintenance of pipelines. Transport via pipelines mcludes tanspor of | gases, liquids, slurry and other commxodities via pipelines. Distribution of | natural ...

  • An oilfield in Libya: A new model to enhance waste water disposal

    Dušan Danilović, Vesna Karović Maričić, Nori Elhaddad, Branko Leković (2016)
    нафта, лежишне воде, припрема

  • Improvement of geodatabase queries within GeolISS

    Ranka Stanković (2008)
    ... string ‘C’, number ‘N,I’, date ‘D’, and domain ‘X’, with the domain name given separately. Ranka Stanković 69 Figure 3. The form for maintenance of query parameters Figure 4 depicts the form for spatial object search for geologic unit outcrop ‘IzdanakKartiraneJedinice’, but in general ...
    ... users to create interactive queries (user created searches), analyze spatial information, edit data, maps, and present the results of all these operations. Data modeling is inspired by different geological models [1], [2], interchange schemes [3], and standards proposed by ISO TC211 [4]. The design ...

  • Application of Expansive Mortars for the Formation of Artificial Screens During Blasting in Urban Areas

    Milanka Negovanović, Lazar Kričak, Stefan Milanović, Nikola Simić, Jelena Majstorović (2024)
    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 ...
    expansive mortar, artificial screens, pressure, rock breaking, building foundation

  • A business intelligence approach to mine safety management

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Dejan Stevanović, Marija Radojičić (2016)
    ... ICT support systems and tools have been developed and implemented, such as diagnostic and prognostic decision support systems, computerized maintenance management systems (CMMS) and enterprise resource planning systems (ERP). Similar to other engineering disciplines the application of ICT in ...
    ... analyst’s queries, so that their analytical or decision-making process is undisturbed. Online analytical processing involves several basic analytical operations, including consolidation, “drill-down” and “slicing and dicing” [7]. In mine safety it is necessary to follow several attributes related to injuries ...

  • Approach to operational mine planning: Case study Tamnava West

    Dejan Stevanović, Mirjana Banković, Milica Pešić Georgiadis, Ranka Stanković (2014)
    ... bench on mining blocks. Bench discretization to mining block level is performed in two steps: 1. Bench area is divided in the direction of operations advancing, on the parts which correspond to the width of the mining blocks (strips). This width is unique for each coal bench and depends ...

  • A hydrogeological model of the open-cast mine Tamnava - West Field (Kolubara Coal Basin, Serbia)

    Jelena Ratković, Dušan Polomčić, Dragoljub Bajić, Bojan Hajdin (2016)
    ... Modelling of changes of hydrodynamic conditions in the aquatic environment of the Maczki-Bór sand pit due to the fact of planned closure of mining operations (NE part of Upper Silesian Coal Basin - Poland). In: RÜDE R. T., FREUND A. and WOLKERSDORFER, CH. (eds.) Proceedings of the 11th International ...

  • VENTEX: An Expert System for Mine Ventilation Systems Analysis

    Ranka Stanković, Nikola Lilić, Ivan Obradović (1996)
    Analiza sistema za ventilaciju je komleksan proces, koji bazira na proračunu brojnih parametara, koji se odnose na: stanje mreže, provetrenost, stabilnost sistema, gubitke vazduha, klimatske uslove, gasno stanje, ugroženost od požara i opasne prašine. Navedeni problemi se uspešno rešavaju paketom SimVent, ali potpuno razumevanje i korišćenje dobijenih rezultata zahteva angažovanje iskusnog specijaliste iz oblasti ventilacije. Rešenje je nađeno u kreiranju ekspertnog sistema VENTEX, čija je baza znanja formalizacija ekspertskog znanja iz oblasti ventilacije rudnika. U radu je prikazana metodologija ...
    ekspertni sistem, ventilacija
    ... objects which contain attributes, i.e. structures that represent their internal data, methods - procedural components, i.e. implementations of operations specified by external links, and rules declarative components of the system featuring related expert knowledge. USER USER INTERFACE KNOWLEDGE ...

  • 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).
    ... stockpiling option for open pit mining operations of two economic minerals, International Journal of Mining, Reclamation and Environment, Vol. 19, no. 3, pp. 176–187. Asad, M.W.A., 2005b, Cut-off grade optimization algorithm for open pit mining operations with consideration of dynamic metal price ...
    ... the 32nd International Symposium on the Application of Computers and Operations Research in the Mineral Industry, Tucson, Arizona, USA, pp. 273–277. Asad, M.W.A., 2007, Optimum cut-off grade policy for open pit mining operations through net present value algorithm considering metal price and cost ...
    ... Akaike, A., Dagdelen, K., 1999, A strategic production scheduling method for an open pit mine, Proceedings of the 28th Application of Computers and Operations Research in the Mineral Industry, pp. 729–738. Amankwah H., 2011, Mathematical Optimization Models and Methods for Open- Pit Mining, Doctoral ...

  • 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
    ... 42]. On the other hand, four categories of industrial clay can be distin- guished based on their quality, rarity, investments necessary to start operations and the markets they need to supply [19]. In Serbia, as in most parts of Eastern and Southeastern Europe, “in situ” kaolin deposits are differentiated ...
    ... exploitation of the new mine/quarry is divided in four steps: geological exploration, approval of exploitation, approval of execu- tion of mining operations, and approval for the use of mining facilities (Figure 2). Resources 2021, 10, 63 10 of 18 Figure 2. General procedure for permitting ...

  • Mine surveying works for the purpose of excavating the remaining reserves of bauxite in the deposit of “Podbracan”

    Aleksandar Milutinović, Aleksandar Ganić, Thamer Rayes Diyab, Rade Tokalić, Meri Ganić (2015)
    ... with only one position of scope (it is required that the total station be previously tested and recti�ed), and that while carrying out of those operations, one must not strictly look at the alignment of instrument and signal, due to the fact that the lengths of sides are short, but one must also ...

  • 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
    ... of the satisfactory value of the machine's availability in the operation depends largely on the appropriate maintenance procedures, logistic support, and from the appropriate maintenance assets [2]. Analytic determination of availability function is possible but requires specific, quite complex ...
    ... three types of bulldozers that operate at the lignite mines. In the end, a comparison of the bulldozers is done. Conclusions can be used for maintenance, in logistics and during the purchasing of new machines. Keywords—availability, expert system, fuzzy theory, bulldozers I. INTRODUCTION ...
    ... theory and it is implemented to three types of bulldozers that operate at the lignite mines. Obtained results are used for the improvement of maintenance and logistics procedures and additionally, could be used as a support during the purchase of new machines. II. AVAILABILITY EVALUATION Av ...

  • 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 ...
    Fuzzy theory, hydraulic excavator, selection, quality of service, asset management

  • 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

  • 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

  • Процена ризика од загађивања водних ресурса под утицајем напуштених рударских радова на простору Србије

    Nebojša B. Atanacković (2018-08-31)
    Велики број напуштених рударских радова и ограничена средства за рекултивацијуи ремедијацију деградираних простора подстакле су развој метода за издвајањеприоритетних локација на које је потребно усмерити даља истраживања. У датомконтексту, у склопу израде дисертације спроведене су научно-истраживачкеактивности које су за предмет имале анализу утицаја значајнијих напуштенихрударских радова на водне ресурсе на простору Србије јужно од Саве и Дунава.Разматрање предметне проблематике извршено је кроз развој и примену семи-квантитативне методологије за анализу ризика од загађивања површинских иподземних вода на регионалној размери. Примењена ...
    анализа ризика, водни ресурси, водна тела, рудничке воде, рударскиотпад, аналитички хијерархијски процеси, кластер анализа, математичка теоријаатрибута, функције припадности, семи-квантитативне методе
    ... Небојша Б. Атанацковић Докторска дисертација RISK ASSESSMENT OF WATER POLLUTION CAUSED BY ABANDONED MINING OPERATIONS IN SERBIA ABSTRACT Numerous abandoned mining operations and limited funding for the recultivation and remediation of degraded soils have motivated the development of ...
    ... загађивања водних ресурса под утицајем напуштених рударских радова на простору Србије;Risk аssessment of water pollution caused by abandoned mining operations in Serbia Nebojša B. Atanacković Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Процена ризика од загађивања ...
    ... загађивања водних ресурса под утицајем напуштених рударских радова на простору Србије;Risk аssessment of water pollution caused by abandoned mining operations in Serbia | Nebojša B. Atanacković | Универзитет у Београду | 2018-08-31 | | http://dr.rgf.bg.ac.rs/s/repo/item/0004078 Дигитални репозиторијум ...