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Упит dcterms_subject_txt:solid mineral raw materials

705 items

  • Split-Desktop software for the analysis of fragment size distribution of blasted rock mass

    Milanka Negovanović, Lazar Kričak, Stefan Milanović, Jovan Marković, Nikola Simić, Snežana Ignjatović (2023)
    Drobljenje stena je najvažniji pokazatelj u proceni efekata miniranja pri proizvodnom miniranju u površinskoj eksploataciji. Stepen drobljenja stena ima veliki uticaj na efikasnost daljih operacija utovara, transporta, drobljenja i mlevenja. Optimalno drobljenje stena pri proizvodnom miniranju utiče na smanjenje ukupnih troškova proizvodnje. Stoga je pouzdana procena veličine drobljenja odminirane stenske mase veoma važno pitanje, ne samo u operacijama miniranja, već i u rudarskoj proizvodnji. Za predviđanje distribucije veličine komada odminirane stenske mase postoje različiti empirijski modeli. KUZ-RAM model omogućava ...
    Split-Desktop softver, drobljenje stena, miniranje, analiza, digitalna obrada fotografija

  • Mineragenija i potencijalnost karbonatnih sirovina rudnog reona Bjelopavlića (Crna Gora)

    Darko M. Božović (2016-09-28)
    Karbonatne sirovine, obzirom na geološku građu Crne Gore predstavljaju jednu od najznačajnijih nemetaličnih mineralnih sirovina. U Crnoj Gori postoje brojna leţišta karbonatnih sirovina (arhitektonsko - građevinskog i tehničko - građevinskog kamena) koja su istraţena ili su u eksploataciji, među kojima rudni reon Bjelopavlića zauzima najznačajnije mjesto.Dosadašnja istraţivanja karbonatnih sirovina na ovom području imala su, međutim, prevashodno uzak istraţivački cilj, utvrđivanje rezervi arhitektonsko - građevinskog i tehničko - građevinskog kamena određenog leţišta, ili preliminarna ispitivanja kvaliteta krečnjaka u njima, sa ...
    karbonatne mineralne sirovine, arhitektonsko - građevinski kamen, tehničko - građevinski kamen, karbonatna punila, rudni reon Bjelopavlića, potencijalnost.
    ... Bjelopavlici, geological characteristics of deposits and occurrences of carbonate raw materials, metalliferous, ore formation and formational types of carbonate raw materials, type of carbonate raw materials and their deposits, reserve and qualitative characteristics, application possibilities ...
    ... POTENTIALITY OF CARBONATE RAW MATERIALS OF MINING AREA OF BJELOBAPLIĆI (MONTENEGRO) Resume The carbonate raw materials, due to the geological structure of Montenegro are one of the most important non-metallic minerals. Moreover, there are numerous deposits of carbonate materials (architectural - ...
    ... can be concluded that this area belongs to the category of very potential for the existence of deposits of carbonate raw materials, which, along with explored raw materials so far, represents good basis for planning future development of carbonate industry in Montenegro, but also future basic ...

  • Application of VIКOR method in the selection of an optimal splution of excavation “Borska Reka” ore deposit

    Sanja Bajić, Dragoljub Bajić, Branko Glušćević, Radmila Gaćina (2023)

  • Overwiew of In-Pit Crushing & Conveying Technology in Open Pit Mines

    Ali Nasirinezhad, Dejan Stevanović, Dragan Ignjatović, Petar Marković (2021)
    The conditions under which contemporary surface mining operations is carried out obviously becoming increasingly complex. In such complex conditions, the optimization of haulage systems as the technological phase with the largest share in the total operating costs, is very important from the aspect of achieving profitability of the mining project. In a large number of cases, the application of traditional haulage systems with trucks (as the most dominant type of haulage in open pit mines) does not lead to ...
    In Pit Crushing and Conveying, IPCC, open pit mining, haulage, optimization, costs saving

  • Mesozoic carbonate rocks in Serbia used as dimension stone

    Vesna Matović, Tijana Vojnović Ćalić (2016)
    The building industry in Serbia uses, to a great extent, imported natural stone for architectural purposes. The significance of local deposits, particularly limestones, is not adequately perceived despite the country’s abundance of these valuable resources. Therefore, this study focuses on Serbia’s Mesozoic carbonate rocks, specifically on the deposits of four selected quarries: Klisura, Skrzut, Struganik, and Tisnica. The quality and prospects of the application of these limestones has not yet been the subject of a detailed, comprehensive investigation. Therefore, ...
    Ukrasni kamen, Mezozoik, Krečnjak, Srbija, Petrografija, Fizičko-mehanička svojstva
    ... of material on the international stone market (Sieg- esmund and Torok 2011). Some of these countries also import considerable quantities of raw materials and semi- finished products and are positioned as leading importers on the world stone market. The high production and processing capacities ...
    ... range of 2,650–2,690 kg/ m* (Fig. 4a). The values of real density (2,700–2,712 kg/ m?) are in accordance with the mineral composition of these almost pure limestones (the main mineral is calcite with a density value of 2,710 kg/m?*; Fig. 4a). The constant real density values of the Tisnica limestone ...
    ... block production of a suitable size) and market demand (Luodes et al. 2000). Despite the fact that concrete and glass were the prin- cipal materials in architectural design during the 1970s and 1980s, in the last three decades, the demand for dimension stone has continuously increased (Siegesmund ...

  • Efikasnost različitih tipova glina Srbije za adsorpciju metilen plavog

    Maja D. Milošević (2016-12-09)
    Adsorpciona efikasnost različitih uzoraka glina sa lokaliteta Srbije određenaje njihovim tretiranjem različitim koncentracijama rastvora metilen plavog (MP).Detaljna mineraloška karakterizacija ispitivanih glina i rezultati njihove interakcijesa rastvorima MP dobijeni su primenom optičkih, rendgenskih, hemijskih, DTA ispektroskopskih metoda.Na osnovu formiranja MP agregata u izmenljivim pozicijama i površiničestica gline, razlikuju se dva tipa glinovitih minerala: visoko naelektrisani(smektiti) i nisko naelektrisani (kaoliniti). Dimeri se stvaraju na naelektrisanimpovršinama, a granica njihovog razvoja omogućuje determinaciju mineralne vrste.Molekuli MP stoje pod uglom od 21.5o kada se ...
    minerali glina, metilen plavo, kristali metilen plavog, difuznarefleksija, adsorpcija, flokulacija, naelektrisanje slojeva
    ... chemistry. Butterworths, London, pp. 236 124 Skendžić D., Jugović S. and Todorović B. 2005. Utilization of Sandy Clay "Kosarno" for other Raw Materials Production. The 19th International Mining Congress and Fair of Turkey, 1MCET2005, Izmir, Turkey, June 09 - 12. 2015 Slomkowski S., Alemán J ...
    ... Grupa 1:1 slojevitih minerala U Grupu 1:1 slojevitih silikata spadaju: dioktaedarski minerali (kaolinitska grupa) i triokataedarski minerali (serpentinska grupa: hrizotil, lizardit i antigorit). 1.2.1.1.1.1. Dioktaedarski 1:1 minerali: kaolinitska grupa Glinoviti minerali u kaolinitskoj grupi ...
    ... prikazu teze. 3 1.2.1. Minerali glina Minerali glina nalaze se među najzastupljenijim mineralima sedimentnih stena koje izgrađuju Zemljinu koru. Mogu nastati različitim procesima kao što su alteracije stena, transformacije drugih primarnih minerala, diagenteskim ili hidrotermalnim ...

  • Atmospheric exposure vs burying: influences on damage intensity of built-in kersantite in the monument of the Small Staircase (Belgrade, Serbia)

    Nevenka Novaković, Predrag Dabić, Vesna Matović (2023)
    Proučavan je efekat „zatrpanog kamena“ na intenzitet procesa degradacije prisutnih na kersantitu koji je ugrađen u spomenik Malo stepenište. Istraživanja su vršena na uzorcima stene iz kamenoloma i na oštećenim kamenim blokovima ugrađenim u spomenik. Dok su neki delovi stepeništa bili pod zemljom 90 godina, većina kamenih elemenata je bila izložena različitim uslovima sredine i antropogenim uticajima. Urađeno je detaljno mapiranje trenutnog stanja spomenika kako bi se istražio uticaj “zatrpavanja” i kompleksne geometrije spomenika na tip propadanja i variranje ...
    Raspadanje, Indeks oštećenja, Zatrpavanje, Fizička svojstva, Kersantit

  • Mineragenetske karakteristike i potencijalnostjuvelirskih mineralnih resursa leckog vulkanskog kompleksa

    Zoran Ž. Miladinović (2012-12-11)
    Jedan od najznačajnijih regiona u Srbiji, sa stanovišta potencijalnosti juvelirskih mneralnih resursa, predstavlja lecki vulkanski kompleks, tercijarne starosti i dominantno andezitskog sastava. Ovaj vulkanski kompleks površine preko 700km2 nalazi se u južnojSrbiji na prostoru imeđu Kuršumlije, Lebana i Medveđe.Prvi su pažnju na juvelirske mineralne sirovine ovog prostora obratili graditeljiJustinijane Prima-e (VI vek). Najintenzivnija istraživanja izvršena su u periodu 1980–1982. ali samo na malom prostoru krajnjeg jugoistočnog dela vulkanskog kompleksa.U Leckom vulkanskom kompleksu dominiraju andezitske stene i njihovi piroklastiti.Smatra se ...
    vulkanski kompleks, mineragenetske karakteristike, juvelirski mineralni resursi, nalazišta, potencijalnost, kvarc, ametist, ahat, kalcedon, jaspis, prognoza
    ... sirovinama, On Precious, Semi-precious and Ornamental Stones as Raw Materials, Geološki anali Balkanskog poluostrva, Knjiga XLII, Annales Géologiques de la Péninsule Balkanique, Tome XLII, p. 527-538, Beograd. Urošević S., Plemeniti minerali i drago kamenje, Poučnik II, Srpska književna zadruga, Grafički ...
    ... Graetsch H. A., Grünberg J. M., Microstructure of flint and other chert raw materials, Archaeometry, 2011, | DOI: 10.1111/j.1475-4754.2011.00610.x Graetsch H. A., Grünberg J. M., Microstructure of flint and other chert raw materials, Grupa autora, 1965: Osnovna geološka karta SFRJ 1:100 000, list K ...
    ... quality of the gemstone raw material is verified through lapidary processing (gemstone cutting) and the production of jewelry. It has been established that the most adequate use of raw material is by using en cabochon cut, gliptography and mixed cut. The quality of the gemstone raw material is verified ...

  • Determination of Mechanical Properties of Altered Dacite by Laboratory Methods

    Veljko Rupar, Vladimir Čebašek, Vladimir Milisavljević, Dejan Stevanović, Nikola Živanović (2021)
    This paper presents a methodology for determining the uniaxial and triaxial compressive strength of heterogeneous material composed of dacite (D) and altered dacite (AD). A zone of gradual transition from altered dacite to dacite was observed in the rock mass. The mechanical properties of the rock material in that zone were determined by laboratory tests of composite samples that consisted of rock material discs. However, the functional dependence on the strength parameter alteration of the rock material (UCS, intact ...
    Geology, Geotechnical Engineering, Engineering Geology
    ... characteristics, the most important of which are: the participation of the main mineral elements [12], mineral grain size [13], arrangement of mineral grains and their shape [14], mutual contact between individual mineral grains [15], and level of alteration [16]. In the analyzed samples D and AD, it ...
    ... Suggested Methods for Determining the Uniaxial Compressive Strength and Deformability of Rock Materials. Int. J. Rock Mech. Min. Sci. 1979, 16, 135–140. 19. Suggested methods for determining the strength of rock materials in triaxial compression. Int. J. Rock Mech. Min. Sci. Géoméch. Abstr. 1978, 15, 47–51 ...
    ... natural samples in layers consisting of salt rock and anhydrite to estimate the strength of rock material for building the storage of liquids, gases, and solid waste material. Greco et al. [8] investigated composite samples that contained different combinations of granite, marble, and limestone from Vicenza ...

  • Correlation Between Dynamic CBR and Compaction and Bearing Capacity of Pavement Foundation Layers

    Milan Bogdanović, Snežana Bogdanović, Dragoslav Rakić, Irena Basarić Ikodinović (2024)
    This paper presents a dynamic California Bearing Ratio (CBRd) device that can be used on a prepared pavement foundation layer to obtain a certain parameter of the tested material in the laboratory and in situ in a direct and fast way. For the selected natural material (gravel), it is shown that the laboratory CBRd can be used to estimate the compaction and bearing capacity, because it correlates well with the parameters of the standard and modifed Proctor compaction tests. ...
    korelacija parametara, donji slojevi saobraćajnica, laboratorijska i terenska ispitivanja, dinamički kalifornijski indeks nosivosti CBRd
    ... extremely underrepresented in the literature, probably owing to the low preva- lence of this method worldwide. The first CBR, study considered mineral materials for roads [1] and report- ed good correlation between static and dynamic test results. A previous CBR, study [2] has presented re- sults for ...
    ... deformation modulus, and dynamic deformation modulus values obtained by field tests. Introduction The compaction and bearing capacity of natural materials are the most important indicators that must be satisfied during the construction of the foundation layers of pavements. Control procedures are used ...
    ... of results obtained under different conditions, and the dependence between the parameters can be consid- ered to evaluate the suitability of materials and the compaction and load capacity in road construction. In the present study, this device was used for measurements in the laboratory and at ...

  • Analysis and visualization of geophysical well-logging data from closely spaced boreholes

    Branislav Sretković, Ivana Vasiljević, Dimitry Sidorov - Biryukov (2024)
    Geophysical logging measurements for determining the condition of the rock mass on the dam profile and locating the predisposed directions of water circulation and loss from the reservoir were conducted in four boreholes distributed at a close distance. The survey was carried out in a typical karst terrain, which is an additional challenge for defining the geological model, especially in terms of water retention. That kind of data set provides an excellent opportunity for a new approach to analysis ...
    well-logging in karst, water loss, data correlation, data fusion
    ... CONTRIBUTIONS TO THE RISBRIEFCASE, AS AN INNOVATIVE AND NON-CONVENTIONAL TEACHING TOOL, IN THE EDUCATION OF YVOUNGER GENERATIONS ABOUT RAW MATERIALS AND THEIR DAILY USES Goran Tasev, Kim Mezga, Lidia Gullon, Santiago Rosado, Todor Serafimovski reOHaCJ]e}ICTBO, reomapKoBu H reoTypH3aM ...
    ... ...... 78 ........................... % ........................... 90 SPATIAL AND GENETIC RELATIONSHIPS BETWEEN PORPHYRY AND EPITHERMAL MINERAL DEPOSITS IN WESTERN SREDNOGORIE, BULGARIA Stefan Pelev, Boris Krestev TeorekTonuKa, Crpykropo.toruja u ByaKanHojtoruja MAHMHOECTATLIHH HA ...

  • Analysis of the exhaust emissions inventory from auxiliary mining machines

    Stevan Đenadić, Aleksandar Mirković, Jovana Mitrović, Filip Miletić, Predrag Jovančić, Dragan Ignjatović (2023)
    Open-pit coal mines are equipped with a large number of mining machines and vehicles with diesel engines. Due to common daily operation of these machines and vehicles large amounts of exhaust gases which contain numerous pollutants are emitted into the atmosphere. The demand to reduce air pollution induced the activities in developed countries to map and calculate all gases emitted by industries to formulate and select adequate preventive activities. In collaboration with machine manufacturers, emission standards for off-road machines ...
    emissions, mining, auxiliary machines

  • Korelacija magnetnog susceptibiliteta i sadržaja metala u flotacijskom jalovištu

    Filip Abramović, Vesna Cvetkov, Aco Ilić, Dragana Životić (2022)
    Procena metala u rudama, jalovištu i zemljištu se tradicionalno određuje hemijskim metodama kao što su Rengen fluorescentna analiza (XRF), Instrumentalna neutronska aktivaciona analiza (INAA) i Masena spektrometrija induktivno spregnute plazme (ICP-MS). Neke od pomenutih metoda su veoma zahtevne i skupe, te se nametnula potreba ka traženju jeftinijeg alata za brzu procenu prisustva pojedinih metala. Tokom poslednjih nekoliko decenija, mnoge studije su pokazale da su magnetna merenja dovoljno osetljiva da detektuju magnetni signal feromagnetnih materijala, a samim tim i metala ...
    flotacijsko jalovište, makroelementi, magnetna merenja

  • Analiza pouzdanosti dozera angažovanih na površinskim kopovima RB Kolubara

    Filip Miletić, Dragan Milčić, Miloš Tanasijević, Miloš Milovančević (2021)
    U radu je izvršena uporedna analiza pouzdanosti transportnih sistema dozera koji rade na površinskim kopovima Rudarskog basena Kolubara. Period za koji je vršena analiza je prvih deset godina eksploatacije. Efikasnost tehnološkog procesa na otkopavanju korisne mineralne sirovine i otkrivke u velikoj meri zavisi od rada dozera. Iskorišćene su matematičke metode za aproksimaciju i identifikaciju zabeleženih vremena u radu, kako bi se dobili analitički pokazatelji pouzdanosti. Na ovaj način se bitno podiže kvalitet upravljanja procesom eksploatacije i održavanja mašina na ...
    dozeri, pouzdanost, kolubarski ugljeni basen
    ... working on the open pit mines of the Kolubara Mining Basin. Analysis period is first ten years of exploitation. Efficiency of process on excavation of mineral raw material and overburden largely depends of dozers work. The paper uses mathematical methods for approximation and identification of working times ...

  • Local Clay as Raw Material in the Oil Industry

    M.B. Oyeneyin (1978)
    Clay, raw material, oil

  • Primena programa UVSZ pri zaštiti od miniranja

    Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Luka Crnogorac, Rade Tokalić (2021)
    Primena energije eksploziva tj. miniranje, predstavlja osnovni način eksploatacije čvrstih mineralnih sirovina u rudarstvu. Miniranjem se postižu vrlo povoljni tehnoekonomski pokazatelji, koje nažalost prate i negativni efekti miniranja. U cilju zaštite životne sredine potrebno je za svaku radnu sredinu odrediti jednačinu oscilovanja stenske mase pri miniranju. Ova jednačina definiše promenu brzine oscilovanja stenske mase u zavisnosti od rastojanja, količine eksploziva, uslova izvođenja miniranja i geoloških karakteristika stenske
    Program UVSZ, miniranje, potres, zaštita životne sredine
    ... miniranje, potres, zaštita životne sredine. Abstract: Application of explosive energy i.e. blasting operation, represents the main way of hard raw materials exploitation in mining industry. Very favorable techno-economic indicators are achieved by blasting, which are followed by negative effects of ...
    ... miniranje, potres, zastita Zivotne sredine. Abstract: Application of explosive energy i.e. blasting operation, represents the main way of hard raw materials exploitation in mining industry. Very favorable techno-economic indicators are achieved by blasting, which are followed by negative effects of blasting ...
    ... [2] Baulovi , J., Pandula, B., Kondela, J., & Prekopová, M. (2019). Optimizing the seismic effects of blasting in quarries by timing, High Energy Materials, 11 (2), 48 − 62. DOI: 10.22211/matwys/0178 ISSN 2083-0165 [3] Coltrinari, G. (2016). Detecting seismic waves induced by blast operations at a ...

  • Testing the energy value of different types of coal by the method of active thermography

    Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković (2020)
    In this paper, coal thermograms are presented and analyzed in order to determine their energy value. Two types of coal of different categories, brown and lignite, were selected for active thermographic imaging. The tested coal samples were processed before measurement so that they are similar in dimensions and have two plane-parallel smooth surfaces. The test samples were "primarily" heated under the same conditions and the process of their cooling was monitored by a thermal camera. "Then" they were cooled ...
    Infrared imaging, nondestructive testing, active thermography, coal.

  • Arsenic in Tap Water of Serbia´s South Pannonian Basin and Arsenic Risk Assessment

    Petar Papić, Marina Ćuk, Maja Todorović, Jana Stojković, Bojan Hajdin, Nebojša Atanacković, Dušan Polomčić (2012)
    kvalitet podzemnih voda, arsen, analiza rizika, Panonski Basen
    ... A health risk assessment model was applied to calculate cumulative exposure to As as well as toxic and carcinogenic risks resulting from drinking raw groundwater contaminated by As in the South Pannonian Basin. Keywords: groundwater quality, arsenic, risk assessment, South Pannonian Basin *e-mail: ...
    ... absorption spectroscopy after acidification with HNO3 in accordance with EPA methods. Based on the results of the measurement of As concen- trations in the raw groundwater, cumulative exposure to arsenic for most endangered cities of Vojvodina and aver- age daily dose were calculated. Chemical analyses (470 ...
    ... Environmental Protection Agency, Intergrated Risk Information System [32-34]. Based on the results of the measurement of As con- centrations in the raw groundwater and the assumption that average 70-kg adults with an average lifespan of 73.9 years in Serbia would intake 1.5 L/day of untreated groundwater ...

  • Application of a Method for Intelligent Multi-Criteria Analysis of the Environmental Impact of Tailing Ponds in Northern Kosovo and Metohija

    Gordana Milentijević, Blagoje Nedeljković, Milena Lekić, Zoran Nikić, Ivica Ristović, Jelena Đokić (2016)
    flotacijska jalovišta, životna sredina, višekriterijumska analiza, ekologija, Trepča
    ... to the administrative decision on the soil quality (RS Official Gazette, No. 88/2010) [18]. 3. Materials and Methods 3.1. Tailing Ponds The waste tailings from processing of flotation of metallic mineral ores are by-products of MMCC “Trepča” mining activities. Keeping in mind the topic of this paper—the ...
    ... with an average velocity of 2.3 m/s and a northwesterly wind with an average velocity of 2.1 m/s [10]. MMCC “Trepča” has produced around 120,000 t of raw lead, 100,000 t refined lead, 100 t of silver, 80,000 t electrolyte zinc, 140,000 t artificial fertilizer, 50,000 t super phosphate, and 30,000 t ac ...
    ... through which comes discharge of atmospheric waters from the landfill directly into the Ibar. Deposed flotation tailing is in general oxidized and solid [1]. č č č č đ ć ć ć đ đ ć Figure 2. Tailing pond Gornje Polje (a)—not active; and tailing pond Bostanište (b)—active. Flotation tailing ...

  • Hydrothermal Synthesized and Alkaline Activated Carbons Prepared from Glucose and Fructose—Detailed Characterization and Testing in Heavy Metals and Methylene Blue Removal

    Sanja Krstić, Milan Kragović, Maja Pagnacco, Vladimir Dodevski, Branka Kaluđerović, Miloš Momčilović, Ivica Ristović, Marija Stojmenović (2018)
    glukoza, fruktoza, аktivni ugalj, hidrotermalni tretman, aktivacija hidroksida, teški metali, metilen plavo
    ... [33–35]. The major drawback of the conventional activated carbon-based adsorption process is the usage of non-renewable and relatively expensive raw materials (i.e., wood and coal), and therefore, it is still considered to be a high cost process with restricted applicability. To overcome such drawbacks ...
    ... followed by high levels of potentially hazardous materials which may have negative influence on the environment as well as human or animal health. In countries with a good economy, strict rules and laws have caused high control of the level of waste materials being released into the environment, and consequently ...
    ... followed by high levels of potentially hazardous materials which may have negative influence on the environment as well as human or animal health. In countries with a good economy, strict rules and laws have caused high control of the level of waste materials being released into the environment, and consequently ...