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Упит dcterms_subject_txt:Utilization and Storage

2416 items

  • Hydraulic impact of pressure transients from water conveyance tunnel on the complex hydrogeological system: A case study HPP

    Igor Jemcov, Maja Todorović, Aleksandar Jemcov, Marina Ćuk Đurović (2024)
    Tunel pod pritiskom, Unutrašnji pijezometri, Tranzijenti pritiska, Karstna izdan, Pukotinska izdan, Hidraulički odziv
    ... involved monitoring of water pressure in the surrounding rock masses and observing the impact of hydraulic transients generated by HPP operation. A comprehensive analysis of monitoring data, incorporating ordinal and partial correlations and considering geological features, provides a profound understanding ...
    ... pressure (Schleiss, 1997, Fernandez and Moon, 2010, Moon and jeong, 2011 ). Usually, in complex geological conditions in hard rocks, tunnels with a large diameter are made of unreinforced concrete lining with grouting to provide stability and prevent permeability. Long-term operation of HPP can cause ...
    ... making the tunnel smooth and protecting the surrounding rock (Zhou et al., 2016). Despite the performance of lining and grouting in the tunnel, achieving complete impermeability remains unattainable. Consequently, the tunnel interacts with geological environments and groundwater, a phenomenon ...

  • Hidrogeološke i hidrohemijske karakteristike pojave termomineralnih voda u reonu Volkovo (Skoplje - Republika severna Makedonija)

    Hristina Petrova, Katarzyna Wątor, Ewa Kmiecik, Piotr Rusiniak, Boris Vakanjac, Vesna Ristić Vakanjac, Dimitar Petrov (2024)
    Kao rezultat tektonskog sklopa i litološko-geološkog sastava, na teritoriji Republike Severne Makedonije registrovan je veliki broj pojava termalnih, mineralnih i termomineralnih voda (T, M i TM voda). Dosadašnja hidrogeološka i hidrohemijska istraživanja ovih voda vršena od strane pojedinih autora sa ciljem da se definiše njihov lekoviti faktor kao i za potrebe banjskog turizma. Sprovedena istraživanja su, dakle, bila lokalnog karaktera i bila su vezana za njihove značajnije pojave. Tokom 70-tih godina prošlog veka, Kotevski je za potrebe izrade doktorske ...
    termomineralne vode, hidrohemijskie karakteristike, lekoviti faktor voda, Valakonje, Republika Severna Makedonija

  • 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
    ... block and the cuts thickness, the left and right circular motions are divided into four segments. So we have the case of the first left (1L1,2,3,4) and the first right pass (1R1,2,3,4) for a 25 cm cut thickness, by the same analogy, 2L and 2R for the second iteration of a 40 cm cut thickness and finally ...
    ... thickness, for a minimum thickness of 25 [cm] and a maximum of 50 [cm]. 3.2. ANFIS prediction ANFIS methodology was used for prediction of motion and vibration in horizontal and vertical direction of the bucket wheel drive in depend on wear of the cutting elements and cut thickness. Performances of the ANFIS ...
    ... with the working environment that are digging are very difficult and complex. During operation, cutting elements are exposed to intensive abra- sive wear and variable dynamic load. This leads to the progressive wear of the teeth, and in severe cases to its deformation or breakage. At that time, the ...

  • 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

  • Influence of Post-Synthesis Treatments on the Properties of Brushite/Monetite Powders

    Željko Radovanović, Lidija Radovanović, Aleksandar Kremenović, Đorđe Janaćković, Rada Petrović (2022)
    Dicalcium phosphate (DP) materials, of which brushite and monetite were the most known, have been intensively studied for several decades because of excellent resorptive and osteoconductive properties that can satisfy the requirements needed for various medical applications, such as bone cements, coatings of metallic implants and bone grafts ...

  • Results of comprehensive monitoring activities on Umka landslide, Belgrade, Serbia

    Biljana Abolmasov, Uroš Đurić (2021)
    klizišta, monitoring

  • Strain partitioning around an indenter during oroclinal bending: kinematics of the Circum-Moesian fault system of the Carpatho-Balkanides

    Nemanja Krstekanić, Liviu Matenco, Uroš Stojadinović, Ernst Willingshofer, Marinko Toljić, Daan Tamminga (2021)

  • Paleomagnetic evidence for post-collisional Miocene clockwise rotation in the Serbian segment of the Vardar Zone and the Danubicum

    Vesna Lesić, Emő Márton, Vesna Cvetkov, Dragana Tomić (2015)
    ... sites of Oligocene and Early Miocene igneous rocks and 6 localities of Late Cretaceous sediments were sampled. From the Danubicum 8 localities of Late Jurassic and Early Cretaceous limestones were collected. The cores were oriented in situ using both geological and sun compass and subjected to standard ...
    ... Vardar Zone and the Danubicum Vesna Lesić, Emő Márton, Vesna Cvetkov, Dragana Tomić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Paleomagnetic evidence for post-collisional Miocene clockwise rotation in the Serbian segment of the Vardar Zone and the Danubicum ...
    ... 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 Paleomagnetic evidence for post-collisional Miocene clockwise rotation in the Serbian segment of the Vardar Zone and the Danubicum ...

  • Aлтерације перидотита контролисане карактером флуида на примеру харцбургита Рудника - Серпентинизација или талкизација?

    Стефан Петровић, Наталија Батоћанин (2020)
    У раду су приказани резултати испитивања серпентинисаних харцбургита Брђана (43°58'45.1" СГШ, 20°25'12.6" ИГД) и талкизираних харцбургита откривених у интервалу 429-559.8 m у истражној бушотини 330А/18 (44°07'33.2" СГШ, 20°30'28.5" ИГД) на Руднику. Узорци оба локалитета показују карактеристике резидуалних харцбургита из омотача, односно тектонита; лепидобластичне, бластозрнасте, или порфирокластичне структуре и масивне текстуре. Серпентинисани харцбургити и серпентинити Брђана су изграђени од серпентина, ретких реликата оливина и ортопироксена, акцесорног спинела, и веома ретког секундарног магнезита и магнетита. Најдоминантнији састојак (местимично гради и преко ...
    Рудник, Брђани, харцбургити, серпентинити, талк

  • 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
    ... Jovancic, P. (2018). Optimization of Operation and Costs of Auxiliary Mechanization in Order to Increase the Utilization of Overburden and Coal Systems on the Open-Cast Mines of Electrical Power Supply of Serbia— Research Study; Faculty of Mining and Geology: Belgrade, Serbia. [4] Djenadic, S ...
    ... Excavator. In Applications and Challenges of Maintenance and Safety Engineering in Industry 4.0 (pp. 142-165). IGI Global. [9] Wang, J., Yang, J.B., & Sen, P. (1995) Safety analyses and synthesis using fuzzy sets and evidential reasoning. Reliability Engineering and System Safety, 47(2), 103-118 ...
    ... pipelayers, hydraulic excavators, and loaders. Hydraulic excavators are used for: construction and maintenance of drainage channels; excavation and loading of materials; field cleaning; cleaning the material around the belt conveyor; digging holes for anchors and poles; demolition of buildings; ...

  • Serbian Society of Geomorphologists

    Dragana Đurić, Jelena Ćalić (2019)
    ... lectures and workshops were organized. Members of the Serbian Society of Geomorphologists participated in this event and presented geomorphology, Serbian Society of Geomorphologists and the advantages of the Sandbox model. Our member Dragana Đurić held the lecture „Get to know the geology“ and presenta- ...
    ... Union and the International Association of Geomorphologists. The Joint Commission/ WorkingGroup was established with the name: “Geomorphology and Society: Past, Present and Future”, aiming to develop an international network of scientists with common interests in the complex, integrated and dynamic ...
    ... the Ministry of Education, Science and Technological Development and co-organised with the Geographical Institute “Jovan Су " SASA. Тће focus was directed to the subject of plains, lowlands and the terminology used in this context in geomorphology, geology and related disciplines. Goal of the conference ...

  • Geology of the southern part of the Sava-Vardar zone: new constraints from the Klepa Mts.

    Dejan Prelević, Ana Mladenović, Violeta Gajić, Milena Dunčić, Blažo Boev (2024)
    Tethys closure, Scaglia Rossa, intracontinental basalts
    ... carbonate rocks arc represented by reddish, locally pinkish, or grey, light grey hemipelagic and pelagic biomicrites with rich planktonic and · benthic · foraminiferal associations. and othcr diverse micro- and macrofossil assemblages (calcareous nannoplankton, calcified radiolarians, palynomorphs ...
    ... which encompasses the Dinaric, Carpathian, and Balkan double-verging Alpine orogenic belt, remains a topic of ongoing debate ({1], [2] and references therein). This orogenic system arose from thc closure of the northern branch of the Neotethys Ocean and subsequent collision-related processes. Key ...
    ... unique opportunity to study the nature and timing of the final closure of the Neotethys Ocean. The Klepa Mountains, situated in the central part of North Macedonia, form a block extending: 5-6 km NNW-SSE and 1-2 km WSW-ENE, reaching a hecight of 1150 m a.s.l. and serving as a prominent landmark in ...

  • Upper Cretaceous scaglia type limestone from Klepa Mts. (North Macedonia) - sedimentology and biostratigraphy

    Violeta Gajić, Milena Dunčić, Ana Mladenović, Dejan Prelević (2024)
    The research area is located in the central part of North Macedonia, in the area of the Klepa Mts. Based on sedimentological, micropaleontological and biostratigraphical investigations of samples from both the east and west side of the Klepa Mts., sedimentary rocks of the Upper Creaceous age are determined. During the latest Cretaceous, this area was dominated by the sedimentation of dominantly carbonate rocks with variable amounts of clastic components. From the tectonic point of view, investigated area belongs to the ...

  • A contribution to the knowledge of facial diversity of Badenian sediments in the Belgrade area

    Filip Anđelković, Dejan Radivojević (2018)
    baden, Beograd, facije, facijalna raznovrsnost, sedimenti

  • A Knowledge-Based Approach to Mine Ventilation Planning in Yugoslav Mining Practice

    Nikola Lilić, Ivan Obradović, Ranka Stanković (2002)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper, we ...

  • Negative Impact of Backwater Levels of Danube River and its Tributaries to the Groundwater Regime in Meliorated Riverside Areas

    Predrag Pajić, Uroš Urošević, Dušan Polomčić, Milan Dimkić (2016)
    This paper describes updated calculation methodology of Danube backwater impact, occurred as a consequence of “Đerdap I” hydropower plant operation, onto the meliorated riverside areas. This methodology is based on hydrodynamic analysis of groundwater regime (size, duration, level and inflow changes) and quantification of melioration areas impairment which is caused by “Đerdap I” hydropower plant operation. By comparing the groundwater regime elements, obtained by variant hydrodynamic calculation in mathematical models for natural – not backed up and actual – ...
    HPP ''Djerdap 1'', backwater influence, groundwater regime, hydrodynamic analysis, melioration area, drainage system, additional energy engagement

  • Polymorphism and photoluminescence properties of K3ErSi2O7

    Predrag Dabić, Marko G. Nikolić, Sabina Kovač, Aleksandar Kremenović (2019)
    alkalni silikati elemenata retkih zemalja, silikati lantanoida, polimorfizam, fotoluminescencija, kristalna struktura
    ... (Tables 4 and 5) show that the bond valences are well balanced and the K—O, Er—O and Si—O bond lengths are consistent with the presence of K+, Er3+, Si4+ and O2� in both structures. Only in polymorph 2 are the bond-valence sums for Er2 and O2 slightly undersaturated (��ij are 2.73 and 1.88 v.u. ...
    ... at journals.iucr.org/c Polymorphism and photoluminescence properties of K3ErSi2O7 Predrag Dabić,a* Marko G. Nikolić,b Sabina Kovača and Aleksandar Kremenovića aUniversity of Belgrade, Faculty of Mining and Geology, Ðušina 7, Belgrade 11000, Serbia, and bUniversity of Belgrade, Institute of ...
    ... the space group P63/mmc and is isostructural with disilicates K3LuSi2O7, K3ScSi2O7 and K3YSi2O7, while the other (denoted 2) crystallizes in the space group P63/mcm and is isostructural with disilicates K3NdSi2O7, K3REESi2O7 (REE = Gd–Yb), K3YSi2O7, K3(Y0.9Dy0.1)Si2O7 and K3SmSi2O7. In the crystal ...

  • New data on Mesozoic Radiolaria of Serbia and Bosnia, and implications for the age and evolution of oceanic volcanic rocks in the Central and Northern Balkans

    Valentina Vishnevskaya, Nevenka Djerić, G.S. Zakariadze (2009)
    Geochemistry and Petrology, Geology

  • Concentracion possibility examination of ore from „Ćulav Brajšor” field, near Medveđa

    Đurica Nikšić, Predrag Lazić, Branko Zečević (2017)
    У раду су приказани резултати лабораторијских испитивања могућности концентрације Pb-Zn-Au-Ag руде са локалитета „Ћулав Брајшор“ из околине Медвеђе. Резултати су добијени током израде студије могућности концентрације ове руде, а у оквиру израде елабората о резервама за ово лежиште које је радила фирма Металфер д.о.о. из Сремске Митровице. На основу резултата лабораторијских испитивања може се рећи да се ради о веома флотационој руди која даје изванредне квалитете концентрата олова и цинка. У концентрату олова добија се висок садржај злата ...
    флотацијска концентрација, квалитет концентрата, искоришћење

  • The Jurassic ophiolitic mélanges in Serbia: a review and new insights

    Nevenka Đerić, Hans-Jürgen Gawlick, Milan Sudar (2024)
    radiolarije, Dinaridi, Tetis, Vardar, trijas-jura
    ... Radiolaria of Bosnia and Serbia: New Data. Paleontological Journal, 43 (12):1–56. VISHNEVSKAYA, V., DJERIĆ, N. & ZAKARIADZE, G.S. 2009. New data on Mesozoic Radiolaria of Serbia and Bosnia, and implications for the age and evolution of oceanic volcanic rocks in the Central and Northern Balkans ...
    ... 2009; GAWLICK et al., 2009a, 2017, 2020; DJERIĆ et al., 2012). Itis one ofthe best-exposed and most important sec- tions, because the contact between radiolarites and the underlying Triassic and lower Liassic carbo- nates is directly exposed here. This parautochtonous sedimentary sequence ...
    ... (Gonje Formation) is still not ex- actly dated and several open questions remained open. This paper deals with the study ofradiolarian assemblage from the Krš Gradac section with its biostratigraphic analysis and correlation. Section description and biostratigraphy The studied section is located ...