Претрага
306 items
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Application of ERT in the study of debris-flow source area: Case study Selanac debris flow
Dragana Đurić, Jelka Krušić, Biljana Abolmasov. "Application of ERT in the study of debris-flow source area: Case study Selanac debris flow" in 11th Congress of the Balkan Geophysical Society, Volume 2021, Online-Romania, 10 -14. Oct 2021,, European Association of Geoscientists & Engineers (2021). https://doi.org/10.3997/2214-4609.202149BGS15
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Hronološki pregled razvoja površinske eksploatacije lignita u Srbiji
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 ...Bojan Dimitrijević, Radmila Gaćina, Bogoljub Vučković. "Hronološki pregled razvoja površinske eksploatacije lignita u Srbiji" in XI Međunarodna konferencija ugalj i kritični mineral CCM 2023, Zlatibor, 11-14. oktobar 2023., Beograd : Jugoslovenski komitet za površinsku eksploataciju (2023)
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Hidrotermalne alteracije kao kontrolni faktor mineralizacije u ležištu bakra Borska reka
Jovana Mirčeta (2024)Rudno polje Bor kome pripada rudno telo Borska reka se nalazi u severnom delu Borsko- Srednjegorske zone Karpato-balkanske metalogenetske provincije. Ležište Borska Reka se nalazi u krajnjim severozapadnim delovima rudnog polja Bor. Smešteno je u intenzivno izmenjenim andezitima i njihovim piroklastitima. Relativno je jednostavne građe. Ležište Borska reka genetski pripada grupi hidrotermalnih ležišta, klasi porfirskih ležišta bakra i zlata. Sastavni je deo velikog hidrotermalnog rudonosnog sistema Bor, koji je po uslovima stvaranja i tipovima rudne mineralizacije sličan hidrotermalnom rudonosnom ...... kvarc-sericitsku alteraciju, odnosno jasnu delimičnu do potpunu zamenu fenokristala hornblende asocijacijom minerala hlorit/sericit/pirit. Svetli minerali su delimično ili potpuno zamenjeni mineralima glina (montmorionitom i kaolinitom). Ovaj tip alteracije Je u korelaciji sa niskim sadržajima bakra i ...
... hidrotermalnog procesa, koji je produkovao različite asocijacije osnovnih rudnih i pratećih minerala u različitim delovima mineralizovanog prostora, kao i različite za njih prostorno vezane alteracione minerale u okolnim stenama orudnjenja. Jedinstveni rudonosni sistemi koji su slični istraživanoj ...
... analize uzoraka pomoću ručnog spektometra. OreXpress spektrometar je prenosivi spektrometar za identifikaciju minerala i analizu jezgra i uzorke bušotina. Ovaj uređaj ubrzava identifikaciju minerala i čini je efikasnijom (Slika 9). Slika 9. Uređaj oreXpress za spektralnu analizu > Merenje. Pre početka ...Jovana Mirčeta. Hidrotermalne alteracije kao kontrolni faktor mineralizacije u ležištu bakra Borska reka, 2024
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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 ...... 117 Sejkora, J., Ondruš, P., Fikar, M., Veselovsky, F., Mach, Z., GabašovA, A., Škoda, R., Beran, P. (2006): Supergene mineral at the Huber stock and Schnod stock deposits, Krasno ore district, the Slavkovsky les area, Czech Republic. Jorunal of the Czech Geological Society, 51, 57–101. Shibata ...
... Asocijaciju minerala čine: pirotin, pirit, halkopirit, šelit, arsenopirit, Bi-telurid, ferberit, siderit, minerali jalovine. Uzorak je predstavljen masivnom pirotinskom rudom u kojoj su prisutni arsenopirit, halkopirit, šelit i minerali jalovine (sl. 4.23 a). Pirotin je dominantni sulfidni mineral. Lokalno ...
... bizmut, hesit, šelit, minerali jalovine. Uzorak je predstavljen razlomljenom silikatnom Jalovinom sa dosta šupljina i pukotina u kojima su smešteni sulfidni minerali. Odnos jalovine i sulfidnih minerala je približno 50% — 50%. Arsenopirit je najzastupljeniji sulfidni mineral. Javlja se u vidu pojedinačnih ...Ivana N. Jelić. Arsenopirit iz rudnih ležišta Šumadijsko-kopaoničke oblasti: paregeneza, sastav i produkti oksidacije, Beograd : [I. Jelić], 2023
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Indexing of textual databases based on lexical resources: A case study for Serbian
In this paper we describe an approach to improvement of information retrieval results for large textual databases by pre-indexing documents using bag-of-words and Named Entity Recognition. The approach was applied on a database of geological projects financed by the Republic of Serbia in the last half century. Each document within this database is described by metadata, consisting of several fields such as title, domain, keywords, abstract, geographical location and the like. A bag of words was produced from these ...... portal3 was established that allows quick and easy access to geological data and information in the field of general geology, ex- ploration of mineral deposits, hydrogeology and engineering geology. Users of published information, professionals or ordinary citizens, can use this geo-portal for search ...
... search- ing with the keyword zlato ‘gold’ the old system ranks the document as 125th with general search and as 84th when searching in the category mineral deposits because the keyword matches only that particular form of the word (two matches highlighted in green in Figure 1). The new system ranks it as the ...
... map of exploration-mining fields, and within multimedia content the most prominent are the gallery of photos and movies, geoheritage, and jeweler mineral resources. The web portal supports access to applications for 3 http://geoliss.mre.gov.rs; search of fund documentation http://geoliss.mre.gov.rs/index ...Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović. "Indexing of textual databases based on lexical resources: A case study for Serbian" in Semantic Keyword-based Search on Structured Data Sources : First COST Action IC1302 International KEYSTONE Conference, IKC 2015, Coimbra, Portugal, September 8-9, 2015. Revised Selected Papers, Springer (2015). https://doi.org/10.1007/978-3-319-27932-9_15
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Improving efficiency of thermal power plants through mine coal quality planning and control
Главни циљ контроле квалитета угља у рудницима лигнита је снабдевање термоелектрана угљем чији квалитет мора да се креће унутар одређених квалитативних ограничења. Карактеристике угља могу да утичу на ефикасност, поузданост и расположивост како котла тако и јединица за контролу емисије. У овом раду аутори су презентовали интегрисану симулацију рударског процеса као нови приступ у истраживању променљивости калоричне вредности угља приликом експлоатације комплексног лежишта лигнита. Резултати таквог приступа омогућавају драгоцен увид у перформансе континуалног рударског система у смислу контроле променљивости ...Mirjana Banković, Dejan Stevanović, Milica Pešić, Aleksandra Tomašević, Ljiljana Kolonja. "Improving efficiency of thermal power plants through mine coal quality planning and control" in Thermal Science, Vinča Institute of Nuclear Sciences (2018). https://doi.org/10.2298/TSCI170605209B
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Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)
A groundwater flow model was developed to simulate groundwater extraction from the public water supply source of the City of Kikinda. The hydrodynamic model includes the municipal groundwater source of Kikinda (Šumice and the Jezero Well), but also an extended area where there are groundwater sources that provide water supply to three factories: (MSK, TM and LŽT - Kikinda). Hydrodynamic modeling, based on the numerical method of finite differences will show the groundwater balance of the sources in the ...... regularly present in these sediments. The color of the sediments ranges from dark gray to light gray and olive gray. Pleistocene and Holocene deposits were abstracted during the Quaternary Journal of Sustainable Development of Energy, Water and Environment Systems Year 2015 Volume 3, Issue ...
... The Upper Pleistocene is comprised of riverine/bog sediments of the riverbed facies and floodplain facies, which constitute the Varoška Terrace deposits of the Würm age. Sedimentological analyses have shown that the riverine and lacustrine sediments were made of sands, silty sands and alevrites ...Dušan Polomčić, Dragoljub Bajić, Jelena Zarić. "Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)" in Journal of Sustainable Development of Energy, Water and Environment Systems (2015). https://doi.org/10.13044/j.sdewes.2015.03.0017
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Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering
Josip Išek, Lazar Kaluđerović, Nikola Vuković, Maja Milošević, Ivana Vukašinović, Zorica Tomić (2020)... Belgrade, Serbia and ŠNTC NIS-Naftagas Ltd, Narodnog fronta 12, 21000 Novi Sad, Serbia Abstract Two samples collected from the phosphogypsum deposits of the chemical products industry Elixir Prahovo (Serbia) were subjected to a recrystallization experiment performed over several repeated cycles ...
... sulfate-based material. The major impurity is Si, followed by small amounts of P, Al, Fe and Sr, which are typical of phosphogypsum from various deposits around the world (Jalali et al., 2016; Zhou et al., 2016; Kandil et al., 2017). The recrystallized PGIP sample is enriched in calcium sulfate ...
... uranium and higher concentrations of thorium and rare earth elements (Moreira et al., 2018). The concentration of ŠO varies according to the mineral origin, from 260 to 1860 Bq kg for apatite and from 460 to 640 Bq kg for phosphorite (Saueia, 1998). Through the manufacturing process, ~80% of ...Josip Išek, Lazar Kaluđerović, Nikola Vuković, Maja Milošević, Ivana Vukašinović, Zorica Tomić. "Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering" in Clay Minerals, Cambridge University press (2020). https://doi.org/10.1180/clm.2020.11
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Simulation of Hydrogeological Environmental Discharge in Case of Interruption Constant Observations
Marina Čokorilo Ilić, Dragoljub Bajić, Miroslav Popović. "Simulation of Hydrogeological Environmental Discharge in Case of Interruption Constant Observations" in International Scientific Conference - Sinteza 2024, Belgrade, 16. maj 2024, Singidunum University (2024). https://doi.org/10.15308/Sinteza-2024-288-294
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Damage quantification of built stone on Dark Gate (Belgrade, Serbia): sample of damage index application for decay rate evaluation
The Dark Gate is the monument of culture, part of the cultural and historical complex of the Belgrade Fortress. It is constructed of limestone blocks that after 270 years of exposure to environmental conditions and different anthropogenic influences show wide ranges of decay forms. During 2007, detail registration of all built limestone microfacies and weathering forms was done using tools of monument mapping. A correlation scheme ‘‘intensity– damage category’’ was made according to the type, intensity, and distribution of ...... blocks in the Dark Gate in correlation to damage category Environ Earth Sci (2015) 73:6181–6193 Group Loss of stone material Discoloration/deposits Detachment Fissures/deformation Main weathering forms Damage category || 2 3 4 5 Surface recession Intensity of decay Depth (cm) <02 ...
... were determined separately for each group of weathering forms which are present on the monument facades (loss of stone material, discoloration/deposits, detachment and fissures/ deformations). State of each stone block was documented by taking photographs and noting present categories of weathering ...
... category “no visible damage” was not observed. As far as groups of weathering forms are concerned, most dominant are loss of stone material, deposits in the form of crusts and detachment (Fig. 4). Loss of stone material is generally presented as surface recession and relief, only occasionally ...Maja Franković, Nevenka Novaković, Vesna Matović. "Damage quantification of built stone on Dark Gate (Belgrade, Serbia): sample of damage index application for decay rate evaluation" in Environmental Earth Sciences, Springer Science and Business Media LLC (2015). https://doi.org/10.1007/s12665-014-3843-z
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Rezultati ispitivanja parametara čvrstoće i dinamičkih svojstava mermera i mogućnost njihove korelacije
Ispitivanja stena kao radne sredine, odnosno materijala sa kojim se gradi, na kome se gradi i u kome se gradi, svojom složenošću zahteva njeno svestrano izučavanje po velikom broju parametara. Zadatak Mehanike stena je da što bolje upozna ponašanje stenske mase i njenu otpornost na dejstvo pritiska, zatezanja i smicanja, kao i dinamičkih svojstava. Poznavanje navedenih parametara i njihova korelacija omogućavaju pouzdaniji izbor parametara za projektovanje danas sve zahtevnijih uslova kako podzemne, tako i površinske eksploatacije. U ovom radu ...mermer, jednoosna čvrstoća na pritisak, čvrstoća na istezanje, brzina longitudinalnih elastičnih talasa, korelacijaJelena Majstorović-Necković, Vladimir Čebašek, Veljko Rupar. "Rezultati ispitivanja parametara čvrstoće i dinamičkih svojstava mermera i mogućnost njihove korelacije" in 11. Međunarodna konferencija “Ugalj i kritični materijali" CCM 2023, Zlatibor, 11-14. oktobar 2023., Beograd : Jugoslovenski komitet za površinsku eksploataciju (2023)
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Early–Middle Jurassic brachiopods from Ponor Mountain, Western Balkan Mountains, Bulgaria; taxonomy, biostratigraphy and occurrence in the context of the early Toarcian Oceanic Anoxic Event
Barbara V. Radulović, Lubomir S. Metodiev, Neda Motchurova-Dekova, Platon Tchoumatchenco. "Early–Middle Jurassic brachiopods from Ponor Mountain, Western Balkan Mountains, Bulgaria; taxonomy, biostratigraphy and occurrence in the context of the early Toarcian Oceanic Anoxic Event" in Historical Biology (2023). https://doi.org/10.1080/08912963.2023.2190757
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Coupling of artificial intelligence methods in the development of hybrid intelligent systems
In this paper we present an approach which couples various artificial intelligence (AI) methods in the solution of complex problems that cannot adequately be solved by a single AI method. We argue that the resulting, hybrid intelligent systems (HIS) can be successfully implemented with the use of available AI software libraries. Different coupling methods are analyzed and a classification of hybrid systems based on the chosen method is given. Two case studies of hybrid systems used in mining engineering ...hibridni inteligentni sistemi, spregnuti sistemi, metode veštačke inteligencije, rudarske primene veštačke inteligencije... analysis of concrete ventilation systems. SimVent is a software package that enables mine ventilation simulation in underground exploitation of ore deposits. The global structure of the mathematical model for ventilation simulation in mine ventilation networks, transformed into the SimVent software ...Ranka Stanković, Ivan Obradović, Nikola Lilić. "Coupling of artificial intelligence methods in the development of hybrid intelligent systems" in X Kongres Matematičara, Matematički fakultet, Beograd (2001)
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The use of biological markers in determination of origin and type of organic matter in the Tisza river sediments
Snežana Štrbac, Gordana Gajica, Aleksandra Šajnović, Nebojša Vasić, Ksenija Stojanović, Branimir Jovančićević (2013)The objective of the study was to determine the origin and type of organic matter (OM) of the Tisza recent sediments along the distance of 153 km through the territory of Serbia. For this purpose group organic-geochemical parameters and biomarker compositions were used. All samples contain approximately same amount of OM, which was deposited under uniform, slightly reducing conditions. Based on the distribution of n-alkanes, the origin and type of OM could not be precisely estimated. However, n-alkane patterns ...... values of the corresponding biomarker parameters in the extracts of sediments of the Tisza River and previously investigated crude oils from oil deposits in the Serbian part of Pannonian Basin showed great similarity between extracts of investigated sediments and crude oils from Rusanda (well 5; depth ...
... the values of corresponding biomarker parameters in the extracts of sediments of the Tisza River and previously investigated crude oils from oil deposits in the Serbian part of Pannonian Basin showed that the oil contaminants observed in Tisza sedi- ments, apart from heavy fuel oil from tankers, to ...
... of biomarkers as a kind of “finger- print”, which depends on the origin, depositional environment, age, maturity, relative length of migration and mineral composition of the source and reservoir rocks.10,11 This feature of oil can be very useful in environmental chemistry for the determination of the ...Snežana Štrbac, Gordana Gajica, Aleksandra Šajnović, Nebojša Vasić, Ksenija Stojanović, Branimir Jovančićević. "The use of biological markers in determination of origin and type of organic matter in the Tisza river sediments" in Journal of Serbian Chemical Society, Beograd : Srpsko hemijsko društvo (2013). https://doi.org/10.2298/JSC130614087S
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Hidrohemijske karakteristike termomineralnih voda Mataruške Banje
Snežana Kretić, Jana Štrbački (2022)Mataruška Banja je naseljeno mesto u Centralnoj Srbiji, koje teritorijalno pripada opštini Kraljevo. Banja je poznata po prirodnim lekovitim vodama visokih temperatura. Formiranje termomineralnih voda vezuje se za rasprostranjenje magmatskih stena. Cilj rada je definisanje hidrohemijskog sastava ovih voda i razmatran je kroz rezultate osam kompletnih hemijskih analiza i jedne skraćene hemijske analize, uzete sa bunara MB-2/81. Hidrogeološka istraživanja, uzorkovanje i izrada kompletnih hemijskih analiza izvršeni su u periodu od 1981. do 2004. godine, dok je uzorkovanje i izrada ...Mataruška Banja, termomineralne vode, kvalitet podzemnih voda, vodonik-sulfid, metasilicijumska kiselinaSnežana Kretić, Jana Štrbački . "Hidrohemijske karakteristike termomineralnih voda Mataruške Banje" in XVI Srpski simpozijum o hidrogeologiji sa međunarodnim učešćem, 28.09−02.10.2022, Zlatibor, Srbija, Rudarsko-geološki fakultet (2022)
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Hydrochemical features and their controlling factors in the Kucaj-Beljanica Massif, Serbia
Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary ChangeFen Huang, Ljiljana Vasic, Xia Wu, Jianhua Cao, Saša Milanovic. "Hydrochemical features and their controlling factors in the Kucaj-Beljanica Massif, Serbia" in Environmental Earth Sciences, Springer Science and Business Media LLC (2019). https://doi.org/10.1007/s12665-019-8452-4
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Alpine thermal events in the central Serbo-Macedonian Massif (southeastern Serbia)
Milorad D. Antić, Alexandre Kounov, Branislav Trivić, Andreas Wetzel, Irena Peytcheva, Albrecht von Quadt (2015)Milorad D. Antić, Alexandre Kounov, Branislav Trivić, Andreas Wetzel, Irena Peytcheva, Albrecht von Quadt. "Alpine thermal events in the central Serbo-Macedonian Massif (southeastern Serbia)" in International Journal of Earth Sciences, Springer Science and Business Media LLC (2015). https://doi.org/10.1007/s00531-015-1266-z
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Numerical modeling of Selanac debris flow propagation using SPH code
The Selanac debris flow is a very huge event triggered after extreme rainfall caused by Cyclone Tamara activity in the Republic of Serbia in May 2014. The Selanac case study was already modelling in different programs using Voellmy rheology assumptions like RAMMS software. In this paper research are focusing particularly on the process of debris flowing from initiation zone to main deposition area using Geoflow SPH two-phase model considering frictional rheology law. Main rheological parameters are back-calculated using also ...... material heights measured with ERT (Electric Resistivity Tomography) profiles. According to geophysical ERT investigation, the highest depths of the deposits are about 20 m. Calculated final volume is about 495 000 m 3 while initial volume was computed to be 447 400 m 3 . The results of erosion depth ...Jelka Krušić, Biljana Abolmasov, Miloš Marjanović, Manuel Pastor, Saeid M. Tayyebi . "Numerical modeling of Selanac debris flow propagation using SPH code" in SCG-XIII International Symposium on Landslides. Cartagena, Colombia- February 22-26, 2021, International Society for Soil Mechanics And Geotechnical Engineering (2021)
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Self-Engineering: Possibilities for Maintenance Operations in the Mining Machines Industry
Self-engineering is a relatively new branch of knowledge that aims to understand how systems could “autonomously” re-configure or repair themselves without the intervention of the operators. A direct field of application is within the maintenance spectrum. Having systems or machines capable of self-detecting or even self-repairing could represent a game-changer, in capital asset fields such as the mining industry in particular. This paper aims to investigate the possible benefits and challenges of self-engineering / self-maintenance concerning mining machines, specifically bucket-wheel ...self-engineering, self-maintenance, maintenance operations, mining industry, bucket-wheel excavator, gearbox revitalizationSteven Manders, Milorad Pantelić, Vladimir Milisavljević, Alberto Martinetti. "Self-Engineering: Possibilities for Maintenance Operations in the Mining Machines Industry" in SSRN Electronic Journal, Elsevier BV (2021). https://doi.org/10.2139/ssrn.3945979
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Analysis and visualization of geophysical well-logging data from closely spaced boreholes
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 ...... .. 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 KPHBOPEUKHOT ...Branislav Sretković, Ivana Vasiljević, Dimitry Sidorov - Biryukov. "Analysis and visualization of geophysical well-logging data from closely spaced boreholes" in Vth Congress of the Geologists of the Republic of North Macedonia, Ohrid, Republic of North Macedonia, September 27-28, 2024, Macedonian Geological Society (2024)