Претрага

Упит dcterms_subject_txt:mechanical extraction methods,

567 items

  • Mogućnost infracrvene termografije pri detekciji štetnih gasova

    Stevan Đenadić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković (2021)
    Curenje pojedinih gasova je opasnost koja može da izazove velike nezgode. Često je praćeno požarima i eksplozijama koji za posledicu mogu da imaju kako ljudske povrede, tako i štetan uticaj na ekologiju i ekonomiju. Da bi se izbegle takve situacije, preventivna inspekcija je od presudne važnosti. Curenje većine gasova se ne može uočiti golim okom a za otkrivanje i procenu stepena curenja može se koristiti tehnologija toplotnog snimanja (infracrvena termografija). U datom radu predstavljene su mogućnosti i ograničenja primene ...
    IC termografija, curenje gasa, termogram

  • Palaeoflora of Kamenica (Pranjani Basin, western Serbia)

    Zorica Lazarević, Ljubica Milovanović, Jelena Milivojević, Ivana Vasiljević (2019)
    Palaeofloras of the Paleogene in Serbia are relatively rare, especially in comparison with floras from Neogene sediments. Most Paleogene phytoas sociations from the territory of Serbia existed in a dry and warm climate. The youngest Paleogene phytoassociation originates from the Pranjani Basin (Western Serbia), locality Kamenica. The age of this palaeoflora is determined as Late Oligocene. This fossil plant assemblage is different from other Paleo gene phytoassociations.The palaeoflora from Kamenica is characterized with leaf imprints larger than in other ...
    макрофлора, млађи олигоцен, Прањански басен, Каменица
    ... leaves good thermometers? a new case for Leaf Margin analysis. Paleobiology, 23 (3): 373–390. WOLF, j. 1971. Tertiary climatic Fluctations and Methods of analysis of Tertiary floras. Palaeogeography, Palaeo- climatology, Palaeoecology, 9: 27–57. Резиме Палеофлора Каменице (Прањански басен, западна ...

  • Primena termografije u rudarstvu

    Stevan Đenadić, Vesna Damnjanović, Predrag Jovančić, Dragan Ignjatović, Dragutin Jovković, Filip Miletić (2019)
    Danas, gotovo da nema oblasti u nauci i tehnici u kojoj se Infracrvena termografija ne primenjuje kao metoda za lociranje i praćenje zagrejanih objekata ili tela, beskontaktnu procenu temperature površina, i nedestruktivno ispitivanje materijala. U radu su prikazane mogućnosti i perspektive primene ove metode u oblasti rudarstva.
    infracrvena termografija, rudarstvo, monitoring
    ... Biochem Physiol A Mol Integr Physiol., 202, pp. 78-98, 2016. [9] InfraTec,. Inspections of Mechanical Components. URL:https://www.infratec-infrared.com/thermography/industries- applications/maintenance-of-mechanical-assemblies/ [10] Zhai X., Wu S., Wnag K., Drebenstedt C., Zhao J., Environmental influences ...
    ... (2), pp. 1550032, 2015. [4] Meola C., Di Maio R., Roberti N., Giovanni Maria Carlomagno N., Application of infrared thermography and geophysical methods for defect detection in architectural structures, Engineering Failure Analysis, Vol. 12, pp. 875-892, 2005. [5] Tomic Lj., Kovacevic A., Damnjanovic ...

  • Indeksi kontrole održavanja i korišćenja rotornog bagera

    Jovana Mitrović, Predrag Jovančić, Dragan Ignjatović, Stevan Đenadić, Filip Miletić (2023)
    Razvoj površinske eksploatacije se u velikom stepenu zasniva na svestranoj mehanizaciji rudarskih radova. Kako bi se zadovoljili potrebni kapaciteti, neophodna je primena savremene mehanizacije, velikih kapaciteta i pouzdanosti u radu. Naime, sa stepenom povećanja mehanizovanosti radova smanjuje se broj zaposlenih radnika, povećava produktivnost rada, smanjuju troškovi po jedinici proizvoda, a samim tim i povećava ekonomičnost površinske eksploatacije. Predmet istraživanja su rotorni bageri SRs 1200 koji predstavljaju samohodne mašine kontinuiranog dejstva namenjene za otkopavanje jalovine i korisne supstance na površinskim ...
    rudarstvo, rotorni bager, indeksi održavanja, indeksi korišćenja, TOPSIS

  • BEYOND 2020 - Geology explorations and open pit activities affectation in reclamation designing in Kolubara Coal Mines (KCM) Serbia, new considerations

    Bojan Dimitrijević, Bogoljub Vučković, Radmila Gaćina (2023)
    Geology explorations in KCM runs from 1936. year up to these days and still ongoing. Results in >7,200 drill holes with ≈600,000 m of core drilling and gave lignite ore resources of > 4,1Bt, which 1,15Bt are excavated since 1986. of XIX up to early years of XXI century. For further mining operations in open pits stay 1,5Bt of lignite. Under waste heaps are ≈80 km2, additional 85 km2 should be filled. All of that masses/areas were, are ...

  • Clockwise vertical-axis rotation in the West Vardar zone of Serbia: Tectonic implications

    Vesna Lesić, Emo Márton, Violeta Gajić, Dragana Jovanović, Vesna Cvetkov (2018)
    The Vardar-Tethyan mega-suture between the Eurasian and Adria (Gondwana) margins comprises remnants of oceanic lithosphere of Neotethys and distal parts of the adjacent continental margins including unconformable Late Cretaceous sedimentary cover and Cenozoic igneous rocks of post-obduction age. This study provides kinematic constraints for displacements and rotations affecting the Serbian part of the West Vardar and Jadar-Kopaonik units after the closure of the Neotethyan (= Sava) Ocean. The targets of the paleomagnetic research were Late Cretaceous sediments representing an ...
    Paleomagnetism, Clockwise rotation, Dinarides, West Vardar zone
    ... versus AF field is plotted 208 V. Lesić et al. localities provided excellent demagnetization curves, responding well to both thermal and AF methods (Fig. 7). 6 Discussion All the sampled Upper Cretaceous localities exhibit sta- tistically well-defined characteristic remanence; k values are ...
    ... Chadima, M., & Jelı́nek, V. (2008). Anisoft 4.2.—Anisotropy data browser. Contributions to Geophysics and Geodesy, 38, 41. Collinson, D. W. (1983). Methods in rock magnetism and palaeo- magnetism, techniques and istrumentation (p. 503). London: Chapman and Hall. Cvetkov, V., Lesić, V., & Vasković ...
    ... Inferences based on study of tectono-magmatic events in the Kopaonik Mts. (Southern Serbia). Tectonophysics, 646, 36–49. Moskowitz, B. M. (1981). Methods for estimating Curie temperatures of titanomagnetites from experimental Js-T data. Earth and Palnetary Science Letters, 53, 84–88. Panaiotu, C. ...

  • 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
    ... n, ion-exchange, coagulation, membrane filtration and photo-degradation [18,19]. Among these, adsorption and ion exchange techniques are upgraded methods in terms of their simplicity, recyclability and mode of waste recovery from the pollutants [18,20]. In recent years, a lot of studies have been performed ...
    ... real wastewater samples taken from tailings of the lead and zinc mine, but experiments were performed in laboratory conditions. 2. Materials and Methods Chemicals that were used in this study were of high purity and supplied from Sigma Aldrich, Darmstadt, Germany. 2.1. Synthesis of the Samples Synthesis ...
    ... NaOH and KOH activated glucose, respectively, and 6.4; 7.4 and 13.5 for LiOH, NaOH and KOH activated fructose, respectively. 2.2. Characterization Methods The crystal structure of the obtained samples was characterized by x-ray powder diffraction (XRPD) analysis using Ultima IV Rigaku diffractometer ...

  • Improvement of geodatabase queries within GeolISS

    Ranka Stanković (2008)
    ... managing and presenting spatially (georeferenced) data and related attributes. Modern GIS technologies are based on digital information, with various methods used for creating digital data. The most common method of data creation is digitization, where a hard copy map or research plan is transferred ...

  • Heavy metals in lignite and soil of Kostolac-Kovin coal basin, eastern Serbia - comparative analysis with selected cities in Serbia, region, Europe and world

    Bogoljub Vučković, Bojan Dimitrijević (2023)
    The Kostolac-Kovin coal basin with an area of 320 km2, with 5 separate layers of coal and with a total of about 5.7 Bt of geological resources and reserves represents an exceptional potential for coal production in Serbia. The coal resources listed in this way are not fully exploitable, but they represent potential for consideration. In this paper, we deal with the geochemical characteristics of coal seams and perform a comparative analysis of coal affectation on the environment. With ...
    lignite, heavy metals, concentrations
    ... , 2012 - Sources identification of heavy metals in urban topsoil from inside the Xi'an Second Ring road, NW China using multivariate statistical methods. CATENA. 2012; 98:73— 78. doi: 10.1016/j.catena.2012.06.007. 7. Cheng Y., Paltseva A., Li 1., Morin T., Huot H., Egendorf S., Su Z., Yolanda R. ...

  • Konceptualni model hidrogeotermalnog sistema šire okoline Brusa - geotermalna karakterizacija sistema / Conceptual model of hydrothermal system of Brus area - system geothermal characterization

    Dejan Milenić, Ana Vranješ, Marinko Toljić, Ivana Vasiljević, Natalija Radosavljević, Matija Ognjanović (2024)
    Postavljeni konceptualni model hidrogeotermalnog sistema Brusa sa širom okolinom testiran je primenom različitih hidrohemijskih i izotopskih metoda u cilju njegove verifikacije i karakterizacije. Rezultati su ukazali na atomsfersko poreklo geotermalnih fluida i na razviće primarnih rezervoara u okviru karbonatnih stena. Prvi rezervoar formiran je u okviru krečnjaka gornjotrijakse starosti, dok drugi rezervoar egzistira u okviru trijskaih mermera. Zone prihranjivanja locirane su u zapadnom delu terena. Sistemi gravitacionih raseda kontrolišu kretanje fluida u sistemu, dok proces jonske izmene dominira u ...
    hidrogeotermalni sistem, hidrohemijske i izotopske metode, mladi intruzivi

  • Bezbednosna rastojanja u jamskim magacinima eksploziva u domaćoj i međunarodnoj praksi

    Luka Crnogorac, Ognjen Popović, Toma Jovičić, Veljko Lapčević (2024)
    Projektovanje jamskih magacina eksploziva predstavlja složen inženjerski problem. Sama namena jamskih magacina zahteva ispunjenost niza uslova koji se odnose na bezbedno pozicioniranje magacina, ispunjenost uslova ventilacije, pristupa, rukovođenja magacinom, načina skladištenja eksplozivnih sredstava, protivpožarne zaštite, elektro zaštite itd. Veoma važan parametar prilikom projektovanja jamskih magacina eksplozivnih sredstava predstavlja minimalno sigurnosno rastojanje između susednih komora u kojima su smeštena eksplozivna sredstva u cilju sprečavanja potencijalnog neželjenog dejstva vazdušnog udarnog talasa, razornog dejstva eksplozije i seizmičkog dejstva eksplozije. U ovom radu su prikazani ...
    jamski magacini, eksplozivi, bezbednosna rastojanja
    ... conditions related to the safe positioning of the magazine, the fulfillment of the conditions of ventilation, access, management of the magazine, methods of storing explosives, fire protection, celectrical protection, etc. A very important parameter for designing underground explosives magazines is ...

  • Damage quantification of built stone on Dark Gate (Belgrade, Serbia): sample of damage index application for decay rate evaluation

    Maja Franković, Nevenka Novaković, Vesna Matović (2015)
    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 ...
    Krečnjak, mapiranje, Indeks raspadanja, brzina raspadanja, progresija
    ... congress on deterioration and conservation of Stone, Vol 2. Elsevier, Amsterdam, pp 13—17 Delgado Rodrigues J, Ferreira Pinto A P, Van Bos M (2004) Methods and approaches in stone conservation: analysis of an enquiry. In: Stockholm, Kwiatkowski D and Lofvendahi R (ed) IOth International congress ...
    ... weathering on historical stone monuments: An example of El- Merdani mosque, Cairo, Egypt. J Earth Sci Eng: 8290 Laurenzi Tabasso M (2004) Products and methods for the conserva- tion of stone: problems and trends, In: Kwiatkowski D, Lofvendahl R (ed) IOth International congress on deterioration and ...

  • Одређивање оптималних параметара рада бушотина у повременом гаслифту

    Радослава Јованчевић (2024)
    Гаслифт представља механичку методу производње при коме се производна бушотина снабдева гасом под високим притиском, а његова притисна енергија се користи како би се подржао еруптивни рад бушотине или након еруптивног рада, у циљу истискивања заосталог флуида. Два основна типа гаслифта су повремени и континуални гаслифт. У овом раду је детаљније описана метода повременог гаслифт система. Одређивање оптималне количине гаса који се утискује и расподела ограничене количине гаса на групу бушотина представља битан део пројектовања сваког гаслифт система. Главни ...
    гаслифт, повремени гаслифт, пројектовање, производња, оптимизација
    ... at Amal oilfield, JokTopcka mucepranuja, PynapcKo-reomomnku (aky-arerT, Beorpajt 4. Khamehchi E., Mahdiani M. R., Gas Allocation Optimization Methods in Artificial Gas Lift 5. Hernandez A., 2016. Fundamentals of gas lift engineering 6. Nishikiori N., Redner. R. A., Doty D. R., Schmidt Z., 1989 ...
    ... Optimization 7. Santos O. G., Bordalo S. N., Alhanati F. J., 2001. Study of the dynamic, optimization and selection of intermittent gas-lift methods - a comprehensive model, Journal of Petroleum Science and Engineering 8. Rashid F., 2017. Gas Lift System 9. Rashid K., 2010. Opfimal Allocation ...

  • 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
    ... 64–69. BATALOVIC V., 2012: Innovative solution for the pump impeller shaft sealing. Proceedings of the Institution of Mechanical Engineers Part E-Journal of Process Mechanical Engineering, vol. 226 br. E4, str. 263–271. DANILOVIC D.S., KAROVIC-MARICIC V.D., BATALOVIC V.B., LEKOVIC B.A., 2012: ...
    ... 2012. 139. Batalović V.: Innovative solution for the pump impeller shaft sealing, Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering November 2012, 2012. 140. Dragićević S., Carević I., Kostadinov S., Novković V., Abolmasov B., Mi- lojković ...
    ... underground mining workings by use drilling and blasting methods of work. Techniques Technologies Education Management, vol. 5, br. 4, 861–866. VIDANOVIC N., OGNJANOVIC S., ILINCIC N., ILIC N., TOKALIC R., 2011: Ap- plication of unconventional methods of underground premises construction in coal mines ...

  • Improvement of education through the cooperation between CEEPUS EURO Geo-Sci network and scientific projects: examples from UB-FMG

    Kristina Šarić, Dejan Prelević, Miloš Marjanović, Uroš Stojadinović, Vladimir Simić (2024)
    CIII-RS-0038, Recon Tethys, DEMONITOR, TMCmod, REASONING

  • Application of Project Management Process on Environmental Management System Improvement in Mining-Energy Complexes

    Jelena Malenović Nikolić, Dejan Vasović , Ivana Filipović , Stevan Mušicki, Ivica Ristović (2016)
    menadžment, rudrastvo i energetski kompleksi, okruženje, održivi razvoj, mrežno planiranje
    ... [CrossRef] 15. Jovovic, A. Assessment of Environmental Impact for the Construction of New Block B3 on the Location of TPP “Kostolac B”; Faculty of Mechanical Engineering and the Faculty of Mining and Geology, University of Belgrade: Belgrade, Serbian, 2013. (In Serbian) 16. Lekic, D.; Jovanovic, M. Reports ...
    ... Federal Ministry for Development, Science and Environment: Belgrade, Serbia, 1997. 7. Miljkovic, M.; Stojkovic, Z. Influence of Metal Ores Surface Extraction to Environmental Factors of the Environment; Faculty of Engineering, Department for mining engineering, University of Belgrade: Bor, Serbia, 1998 ...
    ... : The presented research is a part of the projects “Development of new information and communication technologies, based on advances mathematical methods, with applications in medicine, telecommunications, power systems, protection of natural heritage and education” (III 44006) and “Research and development ...

  • Развој геолошког терминолошког речника ГеолИССТерм

    Ranka Stanković, Branislav Trivić, Olivera Kitanović, Branislav Blagojević, Velizar Nikolić (2011)
    ... an- cestors in Serbian and english. 3.4. Modelling property domains In order to control property values in geolISS, it is necessary to ensure extraction of the sets of terms representing the allowed values for indi- vidual properties, which is done by creating the appropriate domains. The domains ...

  • Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit

    Suzana Lutovac, Nebojša Vidanović, Čedomir Beljić, Zoran Gligorić (2015)
    ... PARAMETER DETERMINATION WITH THE APPLICATION OF LAGRANGE’S THEOREM AT THE “KOVILOVAČA“ OPEN PIT** Abstract Large scale mining as a method of extraction of mineral raw materials have a growing application with the aim to increase the quantity of blasted mass, and to reduce costs of production as ...

  • Hidrogeoekološki uslovi eksploatacije kamenih i mrkih ugljeva Srbije

    Branko R. Miladinović (2016-04-27)
    Ugalj predstavlja energent na čijoj osnovi se razvija privreda celog sveta.Zato mu se pridaje velika pažnja u eksploataciji i preradi, bez obzira na mnogeštetne uticaje na životnu sredinu, a posebno na efekat staklene bašte koji sestvara emisijom zagađujućih materija u atmosferu radom termoelektrana naugalj.U Srbiji, resurs koji se danas u najvećoj meri koristi u proizvodnjielektrične energije je ugalj i on učestvuje u proseku sa 70 %. U strukturi ukupneproizvodnje ugljeva, dominiraju lignitski ugljevi sa učešćem od 98 %, a ...
    Srbija, kameni i mrki ugalj, podzemna eksploatacija, preradauglja, rudničke vode, hemijski sastav, emisija zagađujućih materija, životnasredina
    ... coal extraction, mine dewatering, and coal processing. The results of hydrogeological exploration point to rather complex conditions that govern the formation of mine water, as a result of numerous natural and man-made factors. The mine water regimes are assessed and statistical methods applied ...
    ... and hard coal extraction in Serbia Branko R. Miladinović Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Hidrogeoekološki uslovi eksploatacije kamenih i mrkih ugljeva Srbije;Hydrogeoecological conditions for black lignite and hard coal extraction in Serbia | ...
    ... 3) VI HYDROGEOECOLOGICAL CONDITIONS FOR BLACK LIGNITE AND HARD COAL EXTRACTION IN SERBIA S U M M A R Y Coal is a fossil fuel and one of the drivers of the global economy. Consequently, coal extraction and processing receive much attention, despite adverse environmental impacts ...

  • 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