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Упит dcterms_subject_txt:In Pit Crushing and Conveying

2371 items

  • Phase relations and physical indicators of municipal waste from old landfills in Serbia

    Dragoslav R Rakić, Irena G Basarić Ikodinović, Jovana M Janković, Tina D Đurić (2021)
    Due to certain similarities of municipal waste and soil, usually for the determination of basic parameters of physical state, laboratory and field tests which are common in geotechnical investigations are used. It is often to construct an apparatus for special purpose to perform some specific laboratory and field tests. Therefore, different values of indicators of municipal waste physical state can be found in the literature. The basic reasons should be found in different definitions and methods that researchers use ...
    municipal waste, moisture content, unit weight, specific gravity, grain size distribution, porosityGeneral Computer Science
    ... determination of unit weighh usually used laboratory and field tests are those that are common in geotechnical investigations such as: direc field measurements (excavation of exploration pit at the landfili with measurement of volume and weight of excavated waste), measurements on samples from ...
    ... (Vosniakos and Patronic, 2009). Therefore, data on the composition, shape and size of n i Ra5 o — - particles in the landfill can be of great use in defining m:;';]on and selection || > M @523331 the phase composition and physical indicators of iušLte008| Y Horanalysis| municipal waste. In addition ...
    ... — Initial dry unit weight and dry unit weight in degradation stage no, n — initial porosity and porosity in a certain stage of degradation Wo, W — initial moisture and moisture content in a certain stage of degradation. 3 BASIC INDICATORS OF PHYSICAL STATE In the paper, a three-phase system ...

  • The analysis of the geothermal energy capacity for power generation in Serbia

    Jana Stojković, Goran Marinković, Petar Papić, Mihailo Milivojević, Maja Todorović, Marina Ćuk (2013)
    Renewable Energy, Sustainability and the Environment
    ... y used as a geothermometer in examinations of geothermal resources. In addition to temperature, SiO2 sol- ubility is affected by acidity/alkalinity of solu- tions and a variety of the salts present. Silica is rapidly dissolving in water of low pH values, such as pit water or water with elevated ...
    ... minerals and is therefore widespread in igneous, metamorphic and sedimentary rocks. Silicon concentration is very high before the main stage of a crystallization. It is highest in granites and notably reduced from acid to basic and ultrabasic magmatic rocks. Silicon concentration is also high in granite ...
    ... group of silicate minerals in igneous rocks with the highest proportion of silica in the continental crust. Alkali feldspar and quartz also have large distribution; the two groups of minerals and plagioclases are tectosilicates [10]. Silicon occurs in elevated concentrations in geothermal water as well ...

  • Adaptive neuro-fuzzy prediction of operation of the bucket wheel drive based on wear of cutting elements

    Filip Miletić, Predrag D. Jovančić, Milos Milovančević, Dragan Ignjatović (2020)
    The capacity of the rotor excavator depends largely on the operation of the subsystem for digging. There is a great contribution to the correct and sharp teeth when the capacity is the highest. In the function of time, the teeth become clogged due to abrasive wear, or changes in their geometric shape. To analyze the bucket wheel drive in depend on wear of the cutting elements in this study adaptive neuro fuzzy inference system (ANFIS) approach was implemented. ANFIS ...
    Pogon rotornog točka, habanje, rezni elementi, ANFIS

  • Industrija 4.0 - koncept prediktivnog održavanja 4.0 (PdM 4.0) u rudarstvu

    Predrag Jovančić, Vesna Damnjanović, Dragan Ignjatović, Miloš Tanasijević, Stevan Đenadić (2019)
    Četvrtu industrijsku revoluciju – Industriju 4.0 karakteriše upotreba cyber-fizičkih sistema. Da bi se postigla optimalna strategija održavanja (ali i eksploatacije), neophodno je razviti sisteme koji podržavaju napredne inteligentne sisteme održavanja ili tehnologije pametnog održavanja. Iz toga su proizašli postulati Prediktivnog održavanja 4.0 (PdM 4.0) koji definišu veoma blisku budućnost u oblasti održavanja tehničkih sistema pa i rudarske opreme. PdM 4.0 uključuje iskorišćenje snage veštačke inteligencije za stvaranje stalnog uvida u otkrivanje uzroka i anomalija u radu opreme, koje se ...
    rudarstvo, prediktivno održavanje PdM 4.0, Industrija 4.0

  • P-T analiza RMU Bitola – krupne klase

    Nemanja Dobrosavljević (2024)
    Cilj ovog diplomskog rada je bio ispitivanje mogućnosti i tehnologije čišćenjauglja, kao i predstaviti rezultate pliva – tone analize koja ima za cilj ocenu mogućnosti čišćenja uglja - krupnih klasa posmatranog uzorka. Da bi se ispitivanje i analiza mogućnosti čišćenja rovnog uglja u REK Bitola uspešno priveli kraju, moralo se uraditi uzorkovanje reprezentativnog uzorka iz koga se potom izdvaja prvi deo koji služi za određivanje sadržaja vlage. Pored tog dela iz uzorka se izdvaja i drugi njegov deo koji će ...
    ugalj, lignit, Bitola, PT analiza, pliva-tone analiza, čišćenje uglja, suvi ugalj, vlažan ugalj, pepeo, donja toplotna moć, čist ugalj, jalovina, bilans
    ... observed sample. In order to successfully complete the examination and analysis of the possibility of cleaning the pit coal in REK Bitola, sampling of a representative sample had to be done, from which the first part is then separated, which is used to determine the moisture content. In addition to ...
    ... will be used for the analysis of pit coal, and then a third part of the sample, which will be used for determining the granulometric composition. At the end, a part ofthe sample is separated from the sampled pit coal for PT analysis. After sampling the pit coal and dividing it into segments for further ...
    ... ric composition was performed, using standard and non- standard sicves with the following opening diameters: 60; 31.5; 16; 5; 0.5; 0.25; 0.125 and 0.00 mm. After measuring the size classes, the results are shown in tabular and graphical form. In the special part of the diploma thesis, the results ...

  • Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)

    Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović (2014)

  • Multivarijabilni modeli upravljanja u rudarstvu

    Marjan M. Hudej (2014-02-03)
    osetljivost i rizik. Više pobuda generiše ovakvu atribuciju. Prva je, multivarijabilnostambijentalnih uslova i funkcionalna i strukturna složenost rudarskih sistema (čovek -priroda (radna sredina) - mašina – okruženje); Druga se odnosi na ne postojanje opštenaučne saglasnosti oko ocene pogodnosti modela za podršku odlučivanju i upravljanje.Treća, ako bi saglasnost i postojala, nije sigurno da bi raspoloživi modeli, metode i taktike,dale ekvivalentne rezultate za iste rudničke uslove. Četvrta, sistemske nauke još uveknemaju opšte prihvaćen i u praksi primenljiv algoritam izbora najboljeg rešenja ...
    rudarstvo, odlučivanje, upravljanje, model,multivarijabilno, multiatributno, multikriterijumsko
    ... New approach for selection of waste dump sites in open pit mines, Mining Technology, Vol.117, No. 1, 2008 , 24-31(8). 40. Huang, I.B., Keisler, J., Linkov, I., Multi-criteria decision analysis in environmental science: ten years of applications and trends, Science of the Total Environment 409, 2011 ...
    ... analysis of possible technologies used for selective mining, conveyance and dumping of solum at coal open pit mines of the Electric Power Industry of Serbia, Annual of University of Mining and geology "St. Ivan Rilski", Part II: Mining and mineral processing, Vol. 47, Sofia, Bulgaria, 2004,197-200. 102 ...
    ... OF MANAGEMENT IN MINING Abstract The decision making and management in mining engineering are characterized by complexity, variability, ambiguity, sensibility and risk. There are several incentives for such attribution. The first is multi-variability of environmental conditions and the functional ...

  • Multivarijabilni modeli upravljanja u rudarstvu

    Marjan M. Hudej (2014-02-03)
    osetljivost i rizik. Više pobuda generiše ovakvu atribuciju. Prva je, multivarijabilnostambijentalnih uslova i funkcionalna i strukturna složenost rudarskih sistema (čovek -priroda (radna sredina) - mašina – okruženje); Druga se odnosi na ne postojanje opštenaučne saglasnosti oko ocene pogodnosti modela za podršku odlučivanju i upravljanje.Treća, ako bi saglasnost i postojala, nije sigurno da bi raspoloživi modeli, metode i taktike,dale ekvivalentne rezultate za iste rudničke uslove. Četvrta, sistemske nauke još uveknemaju opšte prihvaćen i u praksi primenljiv algoritam izbora najboljeg rešenja ...
    rudarstvo, odlučivanje, upravljanje, model,multivarijabilno, multiatributno, multikriterijumsko
    ... New approach for selection of waste dump sites in open pit mines, Mining Technology, Vol.117, No. 1, 2008 , 24-31(8). 40. Huang, I.B., Keisler, J., Linkov, I., Multi-criteria decision analysis in environmental science: ten years of applications and trends, Science of the Total Environment 409, 2011 ...
    ... analysis of possible technologies used for selective mining, conveyance and dumping of solum at coal open pit mines of the Electric Power Industry of Serbia, Annual of University of Mining and geology "St. Ivan Rilski", Part II: Mining and mineral processing, Vol. 47, Sofia, Bulgaria, 2004,197-200. 102 ...
    ... OF MANAGEMENT IN MINING Abstract The decision making and management in mining engineering are characterized by complexity, variability, ambiguity, sensibility and risk. There are several incentives for such attribution. The first is multi-variability of environmental conditions and the functional ...

  • Mineralogical analysis of a clay body from Zlakusa, Serbia, used in the manufacture of traditional pottery

    Maja Milošević, Biljana Đorđević, Mihovil Logar (2020)
    калцит, сирова глина, традиционална керамика, Злакуса
    ... minerals in the form of rutile needles (~20 um) are evident in the samples, in agreement with Milošević et al. ( ). A smaller amount of illite occurs in the form of fibres and laths. Halloysite or disordered kaolinite is observed as rolled, platy to elongated tubular particles and is present in minor ...
    ... Serbia, used in the manufacture of traditional pottery Maja Milošević!* (%, Mihovil Logar! and Biljana Djordjević? 1University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia and ŽNational Museum in Belgrade, Belgrade, Serbia Abstract 'The production of pottery in the traditional ...
    ... on Abajo (2000) and (b) Winkler's diagram (Winkler, 1954) of the samples examined. observed in the same region in comparison to the CIMx sample, which is characterized by a broad band. The thermal events at ~350% and ~450%C are indicative of iron minerals (goethite and limonite) and halloysite, which ...

  • Extensive vibrations of the belt conveyer drive electromotor of a bucket wheel excavator as a result of intesified wear-and-tear of its mount support

    Vesna Damnjanović, Predrag Jovančić, Snežana Aleksandrović (2017)

  • Simulation of Hydrogeological Environmental Discharge in Case of Interruption Constant Observations

    Marina Čokorilo Ilić, Dragoljub Bajić, Miroslav Popović (2024)
    Monitoring Network, data, hydrogeological environment, tunnel, simulation

  • Properties of fly ash and slag from the power plants

    Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić (2016)
    This paper describes the physical, chemical and mineral properties of ash and slag, which were taken from thermal power plants Nikola Tesla A, Nikola Tesla B, Kostolac A and Kostolac B. The knowledge of the mineralogical material composition is important because the type of minerals directly determines the properties of the fly ash and slag and their possible application. Laboratory tests showed that ash and slag samples consist of the following minerals: amorphous materials, quartz, feldspar, mullite, melilite, cristobalite, ...
    fly ash, slag, physical composition, chemical composition, mineral composition, X-ray diffraction method
    ... was form open pit mines and 16.3Mt from underground mines (active until 1974). Annually, the Kolubara basin produces about 30Mt lignite, which amounts to 70% of the total coal production in Serbia. According to the Geological Survey of the Kolubara basin, the lignite re- sources and reserves are ...
    ... terial melted in the combustion process and other parts of non- combustible material. It falls through the latticed stokehole and is rapidly cooled and extinguished in water. The fly ash and slag landfills in Serbia occupy an area of 1639 ha and if they are under constant control and monitoring, ...
    ... the Kostolac basin is also of Upper Miocene (Pontian) age and hosts five coal seams, namely Seam III (the oldest and deepest) and Seams II-a, II, I-a and I. Only coal seams III, II and I are (or have been) explored in the Drmno, Ćirikovac and Klenovnik open pits. The average thickness of coal Seam ...

  • Mineralogical study of clays from Dobrodo, Serbia, for use in ceramics

    Maja Milošević, Predrag Dabić, Sabina Kovač, Lazar Kaluđerović, Mihovil Logar (2019)
    keramika, glina, Dobrodo, mineralogija, sirovina, Srbija

  • Definition of groundwater genesis and circulation conditions of the complex hydrogeological karst system Mlava–Belosavac–Belosavac-2 (eastern Serbia)

    Ljiljana Vasić, Saša Milanović, Zoran Stevanović, Laszlo Palcsu (2020)
    Geochemistry and Petrology

  • Model predviđanja potresa od miniranja na površinskim kopovima primenom simulacione metode Monte Karlo i fazi logike

    Milanka N. Negovanović (2015-06-30)
    Modeliranje predviđanja potresa tla od miniranja primenom fazi logike i metode MonteKarlo zasnovano je na podacima dobijenim terenskim merenjima potresa uzrokovanihminiranjem. Promenljive modela definisane su analizom parametara bušenja i miniranjaminskih serija, kao i velosigrama izmerenih potresa od miniranja. Iskorišćene suprednosti fazi logike u implementaciji mnogo većeg broja ulaznih i izlaznih veličina zamodeliranje u odnosu na postojeće empirijske modele. Na osnovu identičnih podataka,dobijen je regresioni model predviđanja potresa, da bi se izvršilo testiranje novogmodela. U cilju povećanja pouzdanosti modela predviđanja, ...
    model, predviđanje potresa, miniranje, površinski kop, Monte Karlo, fazilogika, regresiona analiza, FFT analiza, spektri odziva, pomeraj pukotina
    ... , Measurement and analysis of blast-induced vibrations in the open pit copper mine „Veliki Krivelj“ Bor, Proceedings of the XI National Conference with International Participation of the Open and Underwater Mining of Minerals, Scientific and Technical Union of mining, geology and metallurgy, ...
    ... Beograd, 2015 UNIVERSITY OF BELGRADE FACULTY OF MINING AND GEOLOGY Milanka N. Negovanović MODEL FOR PREDICTION OF BLAST- INDUCED GROUND VIBRATIONS IN OPEN PIT MINES USING MONTE CARLO SIMULATION METHOD AND FUZZY LOGIC Doctoral Dissertation ...
    ... 3) MODEL FOR PREDICTION OF BLAST-INDUCED GROUND VIBRATIONS IN OPEN PIT MINES USING MONTE CARLO SIMULATION METHOD AND FUZZY LOGIC Abstract Modeling the prediction of blast-induced ground vibrations using fuzzy logic and Monte Carlo method is based on data obtained by field measurements ...

  • Rock slope stability analysis under Hoek–Brown failure criterion with different flow rules

    Svetlana Melentijević, Zoran Berisavljević, Dušan Berisavljević, Claudio Olalla Marañón (2024)
    The stability analysis of homogeneous rock slope following the Hoek–Brown failure criterion under the hypothesis of different flow rules is performed based on limit equilibrium and finite element methods. The applied failure criterion is the generalized Hoek–Brown that can be introduced as a shear/normal function in analysis applying different flow rules. The results are compared with those obtained by the application of equivalent shear strength parameters of the Mohr–Coulomb criterion, considering that this is still the most widely used ...
    Kružna klizna površ, Huk-Braunov kriterijum loma, Kriterijum popuštanja, Smičuća/normalna funkcija, Nivo napona, Verovatnoća i parametarska analiza

  • 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
    ... 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 application is necessary in both cases ...
    ... review on methodologies and application, Euro- pean Journal of Operational Research, 200, pp. 198- 215, DOI:10.1016/j.ejor.2009.01.021, 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 ...
    ... Case Study. Interdi- sciplinary, Journal Of Contemporary Research In Business, 3, pp. 655-671, 2012. [11] Dalapati S, Pramanik S, A revisit to NC-VIKOR based MAGDM strategy in neutrosohic cubic set enviroment, Neutrosophic Sets and Systems, 21, pp. 131-141, DOI: 10.5281/zenodo.1235367, 2018. ...

  • Моделирање утицаја одступања линије најмањех отпора од пројектоване на интензитет потреса од минирања

    Стефан Милановић (2024)
    Према дефиницији линија најмањег отпора представља најкраће растојање од центра минског пуњења до слободне површине. Oвим истраживањем представљен је утицај линије најмањег отпора, као и њеног одступања од пројектоване на интезитет потреса услед минирања. Проблем линије најмањег отпора је веома заступљен у пракси, где се занемарује изглед слободне површине, који може бити врло неправилан. Линију најмањег отпора је потребно мерити целом дужином минске бушотине према слободној површини, иако је у пракси случај да се мери најчешће као растојање од ...
    линија најмањег отпора, 3D модел, потреси услед минирања, минирање, слободна површина, метода раздвојених елемената

  • Anisotropic grossular–andradite garnets: Evidence of two stage skarn evolution from Rudnik, Central Serbia

    Bojan Kostić, Danica Srećković-Batoćanin, Petyo Filipov, Pavle Tančić, Kristijan Sokol (2021)
    This paper presents LA-ICP-MS data for garnets from the Rudnik skarn deposit (Serbia), which range from Grs45–58Adr40–52Alm2–3 in the core and Adr70–97Grs2–29Sps1 in the rim displaying anisotropy and zoning. In spite of wide compositional variations the garnets near the end-member of andradite (Adr > 90) are generally isotropic. Fe-rich rims exhibit LREE depletion and flat HREE pattern with weak negative Eu anomaly, including higher As and W contents. On the other side, the Fe-poorer core shows flat REE pattern ...
    grandite, garnets, skarn, Rudnik
    ... Discussion Analysing mineral zonation is a hard and challenging task due to the dimensions of the analysis pit to the relative scale of zonation and the angle of zonation margin to the imaged Fig. 4. BSE image of garnet grains with positions analyzed of EMPA and LA-ICP-MS methods. SN-310 Grain 1 Grain ...
    ... accepted in revised form December 21, 2020; Associate Editor: Igor Broska) Abstract: This paper presents LA-ICP-MS data for garnets from the Rudnik skarn deposit (Serbia), which range from Grs45–58Adr40–52Alm2–3 in the core and Adr70–97Grs2–29Sps1 in the rim displaying anisotropy and zoning. In spite ...
    ... 991 (Si2.962Al0.038)3.000 and grain 2: (Ca2.968Fe2+ 0.011Mn0.021)3.000 (Al0.060Fe3+ 1.926Cr0.002Ti0.012)2.000 (Si3.015Al0.000)3.015) in the rim, with small amounts of alman- dine (core), and spessartine (rim) components. Calcium content is uniform and stable in the core and rim, although the core ...

  • Model predviđanja potresa od miniranja na površinskim kopovima primenom simulacione metode Monte Karlo i fazi logike

    Milanka N. Negovanović (2015-06-30)
    Modeliranje predviđanja potresa tla od miniranja primenom fazi logike i metode MonteKarlo zasnovano je na podacima dobijenim terenskim merenjima potresa uzrokovanihminiranjem. Promenljive modela definisane su analizom parametara bušenja i miniranjaminskih serija, kao i velosigrama izmerenih potresa od miniranja. Iskorišćene suprednosti fazi logike u implementaciji mnogo većeg broja ulaznih i izlaznih veličina zamodeliranje u odnosu na postojeće empirijske modele. Na osnovu identičnih podataka,dobijen je regresioni model predviđanja potresa, da bi se izvršilo testiranje novogmodela. U cilju povećanja pouzdanosti modela predviđanja, ...
    model, predviđanje potresa, miniranje, površinski kop, Monte Karlo, fazilogika, regresiona analiza, FFT analiza, spektri odziva, pomeraj pukotina
    ... , Measurement and analysis of blast-induced vibrations in the open pit copper mine „Veliki Krivelj“ Bor, Proceedings of the XI National Conference with International Participation of the Open and Underwater Mining of Minerals, Scientific and Technical Union of mining, geology and metallurgy, ...
    ... Beograd, 2015 UNIVERSITY OF BELGRADE FACULTY OF MINING AND GEOLOGY Milanka N. Negovanović MODEL FOR PREDICTION OF BLAST- INDUCED GROUND VIBRATIONS IN OPEN PIT MINES USING MONTE CARLO SIMULATION METHOD AND FUZZY LOGIC Doctoral Dissertation ...
    ... 3) MODEL FOR PREDICTION OF BLAST-INDUCED GROUND VIBRATIONS IN OPEN PIT MINES USING MONTE CARLO SIMULATION METHOD AND FUZZY LOGIC Abstract Modeling the prediction of blast-induced ground vibrations using fuzzy logic and Monte Carlo method is based on data obtained by field measurements ...