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Упит dcterms_subject_txt:slope stability

158 items

  • Hronološki pregled razvoja površinske eksploatacije lignita u Srbiji

    Bojan Dimitrijević, Radmila Gaćina, Bogoljub Vučković (2023)
    U ovom preglednom radu dat je istorijski pregled razvoja površinske eksploatacije lignita na teritoriji Srbije, uz kratak osvrt na geološki nastanak i kvalitet i rezerve uglja, kao i mogućnosti korišćenja za dalju upotrebu. Kolubarski, Kostolački i Kovinski ugljeni baseni lignita u Srbiji, ne računajući Kosovsko-Metohijski i Drenički u sastavu AP Kosovo i Metohija po Rezoluciji 1244 UN, su ležišta najrasprostranjenijeg uglja - lignita u Srbiji koji se eksploatiše od druge polovine 20. veka na velikom broju površinskih kopova ...
    površinska eksploatacija ugalja, lignit, Kolubara, Kostolac, Srbija

  • Electronic Dictionaries - from File System to lemon Based Lexical Database

    Ranka Stanković, Cvetana Krstev, Biljana Lazić, Mihailo Škorić (2018)
    In this paper we discuss some well-known morphological descriptions used in various projects and applications (most notably MULTEXT-East and Unitex) and illustrate the encountered problems on Serbian. We have spotted four groups of problems: the lack of a value for an existing category, the lack of a category, the interdependence of values and categories lacking some description, and the lack of a support for some types of categories. At the same time, various descriptions often describe exactly the same ...
    ... link- ing to external resources, while CRUD (create, read, up- date, delete) operations will remain in the relational system, given the required stability and the implementation experi- ence so far. 5. Migration of Dictionary Data The procedure for transferring data from existing dictionar- ies into ...

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

    Dejan Stevanović, Božo Kolonja, Ranka Stanković, Dinko Knežević, Mirjana Banković (2014)
    ... 2 ( ) (6) The stockpile geometry is given with: length, width, height and slope are also input pa- rameters. The software solution give posibility to define stockpile geometry (shape) with length, width, height and slope as input parameters, that provides easy adjustment for other, different stockpile ...
    ... -—n=n? (6) The stockpile geometry is given with: length, width, height and slope are also input pa- rameters. The software solution give posibility to define stockpile geometry (shape) with length, width, height and slope as input parameters, that provides easy adjustment for other, different stockpile ...
    ... coal will retain its important role in power generation in Europe and worldwide. The availability of the worldwide coal resources and their price stability are the main reasons for this trend. Coal is the most important fuel in the generation of electricity, accounting for 65% of the power pro- duced ...

  • Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite

    Philippe Colomban, Aleksandar Kremenović (2020)
    Asbestos-containing pottery shards collected in the northeast of Corsica (Cap Corse) and dating from the 19th century, or earlier, have been analyzed by SEM-EDS, XRPD, FTIR and Raman microspectroscopy. Blue (crocidolite) and white (chrysotile) asbestos fiber bundles are observed in cross-sections. Most of the asbestos is partly or totally dehydroxylated, and some transformation to forsterite is observed to occur, indicative of a firing above 800 C. Examination of freshly fractured pieces shows a nonbrittle fracture with fiber pull-out, consistent with ...
    asbestos, CMC, Corsica, fiber, pottery
    ... matrix with long, ceramic fibers, first with boron and carbon fibers, then with fibers having a more complex composition and better thermochemical stability such as glass (silicate E-glass), SiIC, Al)Os or mullite (SAl,Os:2SiO») [4]. Natural asbestos fibers have additionally been largely used during ...

  • Univerzitet u Beogradu Rudarsko-geološki fakultet Master rad Modeliranje disperzije prašine u životnoj sredini u fazi proširenja P.K. Veliki Krivelj

    Magdalena Milanović (2024)
    Modeliranje disperzije zagađenja životne sredine predstavlja proces u kom se korišćenjem matematičkih modela vrši simulacija širenja i raspodele zagađenja u životnoj sredini, koje nastaje određenim aktivnostima. Modeliranje nam pomaže da predvidimo zagađenja koja dobijamo planiranim aktivnostima u zemljištu, vodi i/ili atmosferi određene regije, kako bi na vreme preduzeli odgovarajuće preventivne mere kojim se smanjuje ili upotpunosti eminiše uticaj na životnu sredinu i zdravlje ljudi. Glavni zadatak ovog rada je procena uticaja, projekta proširenja kopa Veliki Krivelj, na kvalitet vazduha. Rezultati koji ...
    Modeliranje disperzije zagađenja životne sredine, površinski kop Veliki Krivelj, AERMOD, zagađenje vazduha, disperzija prašine
    ... a,c,d ı f su bezdimenzione regresione konstante (dabela 6.7). [5] Tabela 6.1 Konstante regresije za Martinove krive za ruralna područja [5] Stability lor x<1 km lor x> | km category “ c d c d A 213 4408 1.941 9,27 450,7 2.004 .6 B 156 106.6 1,149 3,3 108,2 1008 20 c 104 61,0 0,911 0 61.0 ...
    ... koeficijent disperzije. Regresiona Jednačina McElroy-Poolerova je data u fabeli 6.2. [5] Tabela 6.2 McElroy-Pooler krive za urbana područja [5] = Stability category e„(m)” c.(m)* A 0.32x(1.0-0.0004x)“* 0.24x(1.0+0.001x)"* B 0.32x(1.0-0.0004x)“* 0.24x(1.0+0.001x)"* c O.22x(1.0-0.0004x)“* 0.20x ...

  • 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 ...
    ... distribution analysis in the ventilation network, which are interactively connected. SimVent can be used for the analysis of venti- lation system stability in mine defense and rescue plan verification, within mine ventilation services, design and research companies. We chose Visual Studio 6.0 as the ...

  • Hyperpycnites within the Devonian-Carboniferous flysch of the Carpatho-Balkanides (Kostadinovica, eastern Serbia)

    Miloš Radonjić (2020)
    This study presents new discoveries of vascular plants and the trace fossil Dictyodora liebeana (GEINITZ) from the Devonian–Carboniferous Kučaj-Zvonce flysch of the Carpatho-Balkanides and the implications of this fossil association for its sedimentary setting. The occurrence of the described plant debris in a deep-marine environment indicates the presence of hyperpycnites within the siliciclastic turbidites exposed at the Kostadinovica locality. The sedimentological data and the characteristics of the fossil material support the proposed model in which the sediment was at ...
    Mississippian flora, Dictyodora liebeana (GEINITZ), hyperpycnites, Kučaj-Zvonce flysch, Carpatho-Balkanides
    ... remobilization of the sediment by turbidity currents is manifested by brief events (lasting several minutes) that originate on the basin slope due to stability failure of the sediment (MUTTI et al., 2009). The result- ing deposits of both processes reflect their different natures: (1) the hyperpycnites ...
    ... fine-grained graptolite schists (KRSTIĆ & MASLAREVIĆ, 1990). The Devonian (Late Lochkovian to Late Frasnian) Pre-flysch is defined as channeled slope facies with the addition of hemipelagic shales, cherts and limestones (KRSTIĆ et al., 2004) which terminates with dolo- mitic limestones containing ...
    ... of the circum Pannonian flysch system (EBNER et al., 2008). The Kučaj-Zvonce flysch was interpreted as a retro- grading system of deposits of the slope to mid-fan and the outer- fan to basin tract (KRSTIĆ et al., 2004). The Bouma divisions were used for the description of the sedimentary sequences ...

  • 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

  • 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
    ... values that can be used, along with rock mass classifica- tion systems, as a basis for assessing rock mass input parameters necessary for geotechnical stability analysis and detailed design solutions. Author Contributions: Conceptualization, V.R.; methodology, V.R. and V.Č.; validation, V.M., D.S. and N ...
    ... 813 4 of 19 material are affected mainly by the mineralogical and petrographic characteristics of quartz and biotite. Figure 2. Analyzed open pit slope consisting of dacite with microscopic images of the material: (a) altered dacite and (b) dacite. Exploration works were based primarily on exploratory ...

  • Development of an integrated model for open-pit-mine discontinuous haulage system optimization

    Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević , Dejan Stevanović (2024)
    equipment selection, mine mechanization, expert judgment, linguistic variables, MCDM, FAHP

  • 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
    ... sides of the dam, solid parts are noticeable. Due to the fact that raising the upper level of the dam is no longer possible since its construction stability is in danger, there is further land filling with flotation tailing and a new tailing pond, Bostanište, has been established. Landfill Bostanište ...
    ... Active Not active Not active Not active Active Geological environment—C8 Alluvial Alluvial Alluvial Alluvial Alluvial 4 m 4 m 4 m 4 m 4 m General slope of the terrain—C9 8% 0% 0% 7% 8% Tailing maintenance—C10 No maintenance No maintenance No maintenance No maintenance No maintenance Flotation tailing ...
    ... 7 ha and on it are approximately 2,600,000 t of deposed tailings. The landfill dam has several steep slopes. Tailing is placed at the bottom of the slope, where there is a tree line next to the Ibar. The landfill was never reclaimed completely and, as a consequence, dust rises and endangers the Leposavić ...

  • Споменица 1991. – 2015. година: 135 година геологије и 70 година рударства на Универзитету у Београду

    главни и одговорни уредник Душан Поломчић (2016)
    Рударско-геолошки факултет
    ... HADŽI-NIKOVIĆ G., 1998: Slope stability analyses in complex geotechnical conditions. Proceedings 8th Congress of the International Association for Engineering Geology and the Environment, Vol. 3: 1523–1530, Vancouver, British Columbia, Canada. HADZI-NIKOVIĆ G., 2002: Slope stability in unsatureated o ...
    ... September-October 2010, 554–560. VUJIĆ S., ČEBAŠEK V., GAJIĆ G., GOJKOVIĆ N., MILJANOVIĆ I., PETROVSKI A., 2011: Potential traps and risks in slope stability calculations at open pit mines. 4th Balkan Mining Congress Balkanmine 2011, Ljubljana, Slovenia, 18-20.10.2011., pp. 527–530. MILADINOVIĆ M ...
    ... Francis Group, Napoli, Italy, May 2013. pp. 273–278. DOI: 10.1201/b14895-32. HADŽI-NIKOVIĆ G., ĆORIĆ S., GOMILANOVIĆ J., 2013: Application of 3D slope stability analysis in definig excavation conditions for the open pit mines. Mining and Metallurgy Engineering Bor, 2/2013, 1–11, Mining and Metallurgy ...

  • Photocatalytic Activity of the V2O5 Catalyst toward Selected Pharmaceuticals and Their Mixture: Influence of the Molecular Structure on the Efficiency of the Process

    Sanja J. Armaković, Aleksandra Jovanoski Kostić, Andrijana Bilić, Maria M. Savanović, Nataša Tomić, Aleksandar Kremenović, Maja Šćepanović, Mirjana Grujić-Brojčin, Jovana Ćirković, Stevan Armaković (2023)
    Due to the inability of conventional wastewater treatment procedures to remove organic pharmaceutical pollutants, active pharmaceutical components remain in wastewater and even reach tap water. In terms of pharmaceutical pollutants, the scientific community focuses on -blockers due to their extensive (over)usage and moderately high solubility. In this study, the photocatalytic activity of V2O5 was investigated through the degradation of nadolol (NAD), pindolol (PIN), metoprolol (MET), and their mixture under ultraviolet (UV) irradiation in water. For the preparation of V2O5, facile ...
    DFT analysis, metoprolol, nadolol, nanomaterial characterization, photocatalysis, pindolol, β-blocker
    ... with colossal potential in water treatment because of its capability of light absorption, lower bandgap (2.3 eV) than TiO» and ZnO, chemical stability, and surface catalytic properties [21-25]. Following, previously obtained results (Table 1), the V»Os catalyst showed significant photocatalytic ...

  • A Model for Determining the Dependability of Continuous Subsystems in Coal Mines Using the Fuzzy Logic Approach

    Nikola Stanić, Miljan Gomilanović, Petar Marković, Daniel Krzanović, Aleksandar Doderović, Saša Stepanović (2024)
    This study presents a unique model for assessing the dependability of continuous parts of combined systems in open-pit mining through the application of fuzzy logic. Continuous sub-systems as part of the combined system of coal exploitation in surface mines have the basic function of ensuring safe operation, high capacity with high reliability, and low costs. These subsystems are usually part of the thermal power plant’s coal supply system and ensure stable fuel supply. The model integrates various independent partial ...
    fuzzy logic, max-min composition, continuous part of combined system (CCS), open pit, mining, dependability

  • Arsenopirit iz rudnih ležišta Šumadijsko-kopaoničke oblasti: paregeneza, sastav i produkti oksidacije

    Ivana N. Jelić (2023)
    Arsenopirit, FeAsS je čest pratilac polimetaličnih orudnjenja Šumadijsko-kopaoničke oblasti. Jedan je od sulfida koji u najvećoj meri koncentriše zlato. Nepoželjan je u rudama jer njegovom oksidacijom na jalovištima može doći do oslobađanja arsena koji spada u elemente toksične za životnu sredinu. U okviru ovog doktorata sistematski su ispitivani arsenopiriti iz različitih stadijuma i tipova orudnjenja rudnih ležišta i mineralizacija Šumadijsko-kopaoničke oblasti (Rudnik, Sastavci, Trepča, Gokčanica – Drenjak i Rujak, Golijska reka i Jurija). Uzorci arsenopirita ispitivani su polarizacionom mikroskopijom ...
    arsenopirit, zlato, skorodit, Šumadijsko-kopaonička oblast, parageneza, zonarnost
    ... Millennium: Australian Geological Convention, Sydney, Australia, 3—7 July 2000; p. 135. Dove, P. M., Rimstidt, J. D. (1985): The solubility and stability of scorodite, FeAsOa x 2H»O. American Mineralogist, 70, 838-844. Drahota, P. and Filippi, M. (2009): Secondary arsenic minerals in the environment: ...
    ... from lead-zinc deposits, Kosovo: An electron microprobe and LA-ICP- MS study. Minerals, 6(2), 42. Krause, E., Ettel, V. A. (1988): Solubility and stability of scorodite, FeAsOa x 2H»O: New data and further discussion. American Mineralogist, 73, 850-854. Kretschmar, U. and Scott, S. D. (1976): Phase ...
    ... (III) hydroxide complexes at hydrothermal conditions. Geochimica et Cosmochimica Acta, 60, 737—749. Pokrovski, G. S., Kara, S., Roux, J. (2002): Stability and solibility of arsenopyrite, FeAsS, in crustal fluids. Geochimica et Cosmochimica Acta, 66, 2361-2378. Pokrovski, G. S., Escoda, C., Blanchard ...

  • Sustainable Modularity Approach to Facilities Development Based on Geothermal Energy Potential

    Nataša Čuković-Ignjatović, Ana Vranješ, Dušan Ignjatović, Dejan Milenić, Olivera Krunić (2021)
    The study presented in this paper assessed the multidisciplinary approach of geothermal potential in the area of the most southeastern part of the Pannonian basin, focused on resources utilization. This study aims to present a method for the cascade use of geothermal energy as a source of thermal energy for space heating and cooling and as a resource for balneological purposes. Two particular sites were selected—one in a natural environment; the other within a small settlement. Geothermal resources come ...
    геотермална енергија, Панонски басен, геотермална каскада, енергетска ефикасност, бањски центри, балнеологија, биоклиматска архитектура, стратегије пасивног дизајнирања, модуларни објекти
    ... for providing heat for facilities and balenologi- cal purposes. This principle led to the three limiting parameters for the system: • temperature stability, • available resource quantity, • and chemical composition The possibility of geothermal energy application depends on fluid temperature. The two ...

  • Upravljanje proizvodnjom nafte – novi alat na bazi fazi logike

    Мирослав Црногорац, Душан Даниловић, Лола Томић (2020)
    ... kvalitet. Abstract: Besides aroma, and color, the structure and stability of the foam are among the most important characteristics of the beer. Stable foam is an indicator of a good beer state. The biggest impact on foam stability except carbon dioxide have substances which favor the formation of ...
    ... Manojlović76 Visoka tehnička škola strukovnih studija u Zrenjaninu, Zrenjanin Struktura i stabilnost pene različitih vrsta piva Structure and foam stability of different types of beer Rezime: Pored ukusa, mirisa i boje, struktura i stabilnost pene ubrajaju se u jedne od najvažnijih osobina piva. ...
    ... of foam, the so-called foamers such as peptone, albumosis, resin, etc. Except for foamers, foam stabilizers have a great influence on the stability of the foam as well as its structure. Most consumers expect the beer to have an attractive foam that lasts for a long time and will attach to the glass ...

  • Развој хибридног модела за оптиматизацију завршне контуре одлагалишта у површинској експлоатацији лежишта минералних сировина

    Aлександар Додеровић (2024)
    Површинска експлоатација минералних сировина захтијева претходно откопавање значајних( милионских) количина јаловине, које је неопходно транспортовати до локације на којој ће сеона трајно одложити. Традиционални приступ избора локације и дизајна одлагалишта се карактерише парцијалним приступом, заснованом на анализи неколико водећих критеријума као и на личном искуству инжењера, често занемарујући синергетски ефекат осталих утицајних фактора Технолошке операције које се односе на манипулацију јаловином, међу којима предњачи транспорт, генеришу највећи дио трошкова у површинској експлоатацији. Такође, цјелокупан процес експлоатације додатно је ограничен ...
    оптимизације завршне контуре одлагалишта, хибридни модел, површинска експлоатација, генетски алгоритам

  • 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
    ... 246 2 of 21 Heavy metals are one of the most dangerous pollutants in the nature. They are especially toxic for living organisms because of their stability and tendency of accumulation in the environment [1]. With the rapid development of industries such as plating facilities, fertilizers, tanneries, ...

  • Uticaj raspadanja na stabilnost kosina u mekoj stenskoj masi

    Anđela Despotov (2024)
    U radu je opisano ponašanje mekih stenskih masa koje su izložene porecesu raspadanja tokom određenog vremenskog perioda. Meke stenske predstavljaju kritične vrste stenskih masa pošto izazivaju različite probleme tokom izvođenja građevinskih radova. Meke stene mogu biti sedimentne stene, raspadnute metamorfne i magmatske stene. Odlikuju se niskim vrednostima čvrstoće, visokom deformabilnošću, visokom plastičnošću, podložne su dezintegraciji i fizičko-hemijskom raspadanju, odnosno ubrzanom dejstvu površinskog raspadanja usled atmosferskih uticaja.Za klasifikaciju mekih stenskih masa koriste se modifikovane verzije već postojećih klasifikacionih sistema. Jedan ...
    meke stenske mase, dezintegracija, klasifikacioni sistemi, Slake durability test
    ... of laboratory simulated weathering. Građevinar, Vol. 68 No. 12., 2016. 35 11. Vlastelica, G., Miščevć, P., (2014) Impact of weathering on slope stability in soft rock mass. Faculty of Civil Engineering, Architecture and Geodesy, University of Split, Croatia 12. Dempsey, C., (2020) Physical and ...