Претрага
1170 items
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Izbor rotornih bagera za proces revitalizacije: primer rotornih bagera SRs 1200 u rudarskom basenu Kolubara
Predrag Jovančić, Dragan Ignjatović, Stevan Đenadić, Filip Miletić, Goran Todorović, Dragan Novaković (2020)Revitalizacija je proces ili skup tehničkih zahvata na mašini kojim se vrši zamena svih dotrajalih ili oštećenih delova metalne konstrukcije. Sastavni deo procesa revitalizacije je i modernizacija zastarele elektro-mašinske opreme. Principi revitalizacije sasvim sigurno nisu sadržani u okviru redovnog godišnjeg ili dnevnog održavanja. Oni predstavljaju održavanje onih veličina koje su značajne za mašinu kao celinu (u ovom slučaju rotorni bager). U ovom radu su analizirani rotorni bageri oznake SRs 1200. Na površinskim kopovima rudarskog basena Kolubara takvih bagera ima ...Predrag Jovančić, Dragan Ignjatović, Stevan Đenadić, Filip Miletić, Goran Todorović, Dragan Novaković. "Izbor rotornih bagera za proces revitalizacije: primer rotornih bagera SRs 1200 u rudarskom basenu Kolubara" in XIV Međunarodna konferencija OMC 2020, Zlatibor, Srbija, 14-17. oktobar 2020., Jugoslovenski komitet za površinsku eksploataciju (2020)
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Priprema ležišta bakra i zlata za primenu metode podzemnog otkopavanja u pojasevima iznad XIX horizonta
Strahinja Petković (2024)Ovaj rad se fokusira na primenu metode otkopavanja sa zasipavanjem otkopnog prostora na primeru ležišta bakra.Analizirani su ključni elementi, uključujući geološke karakteristike ležišta, tehničko-eksploatacione faktore, dimenzionisanje prostorija, pripremne radove, bušačko-minerske aktivnosti, utovar i transport, ventilaciju i zasipavanje otkopanog prostora pastom zasipom. Takođe je, sprovedena analiza troškova, uključujući cenu izrade pripremnih prostorija po dužnom metru, u zavisnosti od kvaliteta radnog okruženja. Na kraju su definisani osnovni pokazatelji otkopavanja ležišta, uključujući količinu rude u otkopnom pojasu, kao i koeficijente iskorišćenja i ...... Količina eksploziva - Ako usvojimo da Je linija najmanjeg otpora W = 2 m, količina eksploziva po lepezi za celu visinu bloka iznosi Qe=qx V=qxPb ı W,kg gde je: V – zapremina rude u bloku jedne lepeze miniranja (Pb x W) Pb – površina miniranja jedne lepeze (223,35 m?) W - linija njamanjeg otpora ...
... izračunava se na osnovu brzine bušenja (po preporuci proizvođača opreme) v = 0,5 m/min. Ukupno vreme bušenja jedne lepeze: N T,= ) — + — xf L . +—o—x2xt, +t, +t,,min | BEČ s pb gde je: L» - dužina svih bušotina (109 m) v - brzina bušenja (0,5 m/min) n - broj bušaćih čekića (1) N - broj ...
... Gornjokredni vulkaniti (Hfaza) Gornjokredni vulkaniti dftaza) Sedimenti Gomje kređe Mezozoik obodne zone (Jura — Kreda) o 4 [ 12 16 km JAAR V 3 Slika 2 Geografski položaj ležišta: plava boja – kontura eksploatacionog polja , crvena boja – kontura rudnog tela 2.3.Istražni radovi Geološka ...Strahinja Petković. Priprema ležišta bakra i zlata za primenu metode podzemnog otkopavanja u pojasevima iznad XIX horizonta, 2024
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Stabilization and monitoring of the slope deformation appearance on marl open-pit Filijala in order to minimize the risk of exploitation process interruption
Gojković Nebojša, Čebašek Vladimir, Ganić Aleksandar, Milutinović Aleksandar. "Stabilization and monitoring of the slope deformation appearance on marl open-pit Filijala in order to minimize the risk of exploitation process interruption" in V-th International geomechanics conference 1, Varna, Bulgaria:Scientific and Technical Union of Mining, Geology and Metallurgy (2012): 220-227
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Opening and development of the subhorizont at a level of 20m in mine Veliki Majdan - Ljubovija, Republic of Serbia
Mitić Saša, Milojević Dragan, Makar Nenad, Tokalić Rade. "Opening and development of the subhorizont at a level of 20m in mine Veliki Majdan - Ljubovija, Republic of Serbia" in Zbornik na trudovi PODEKS ’11 - V stručno sovetuvanje na tema: Tehnologija na podzemna eksploatacija na mineralni surovini – Makedonska Kamenica, 11-12.11.2011. 1, Makedonska Kamenica:Sojuz na rudarskite i geološkite inženeri na Makedonija (2011): 60-65
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Geochemical properties of the sediments of the Great War Island, Belgrade (Serbia)
Zarić Nenad, Šajnovič Aleksandra, Jovančićević Branislav, Baltić Nevena, Ranđelović Dragana, Kašanin-Grubin Milica (2017)Zarić Nenad, Šajnovič Aleksandra, Jovančićević Branislav, Baltić Nevena, Ranđelović Dragana, Kašanin-Grubin Milica. "Geochemical properties of the sediments of the Great War Island, Belgrade (Serbia)" in Book of Abstracts of the18th European Meeting on Environmental Chemistry - EMEC18: Chemistry Towards an Infinite Environment, :Association of Chemistry and the Environment (2017): 241-242
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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 ...... 10). Hydrothermal Minerals – Epithermal Environment - ~ II | | || | | i —— A d \ i J · J FOO ) V | \ I )] OE. i ž LO d —~ C | \ w \ r N \ _ ~O W:W}.š 1 \ z P a 0 | * V\ M_ | EAV j| .~ Q \ \ {G | | _ R ~ ~(By | u _ ()' [ IJL a T TE a Wovelength (nm) Wovelength (nm) ...
... 24 KNKJ 0.0:30.J 500341 470.BOAAAAAAAAAAAAAMAAAAAAAAAAAAAAAAAAAAARAAAAAARAARAAAWARAARARAARARRARRRARARARARARRRRRARARRRRARRIA 25 4. j:4:740J 8 V.U V IRVAAAAAAAAAAAAAAAAAAAAAAAAAARAAARAAARARARARARARARARRRARRRRROARARARARRRRORRRRRRRARRRRRARRRRRIRRRRARWMAR 26 PR NR 0r2J.V2:1;00J E IAAAAAA AAAAAA 26 ...
... Timočkog magmatskog kompleksa (u daljem tekstu: TMK), odnosno Borske metalogenetske zone sa ekonomski značajnim rudnim ležištima: Bor, Majdanpek, V. Krivelj, Cerovo i dr. Na istočnom obodu TMK nalazi se ı više ležišta nemetaličnih mineralnih sirovina: ležište krečnjaka Zagrađe, kvarcnih peščara ...Jovana Mirčeta. Hidrotermalne alteracije kao kontrolni faktor mineralizacije u ležištu bakra Borska reka, 2024
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Nelinearno dinamičko modelovanje potresa izazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija
Srđan D. Kostić (2013-11-04)U ovoj disertaciji, cilj istraživanja bio je određivanje dinamičkih svojstava potresaizazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija.Analiza potresa izvedena je sa dva aspekta – u prvom delu istraživanja izučavane suvremenske serije oscilovanja tla za vreme potresa, a u drugom delu vršena je analizastabilnosti fenomenološkog Baridž-Knopof modela bloka sa oprugom. Vremenske serijeoscilovanja tla proučavane su primenom postupka analize surogat podataka, kao ikorišćenjem metoda analize nelinearnih vremenskih serija (primena teoreme orazvijanju skalarne vremenske serije). Analiza vremenskih serija izvedena je ...potres, naponsko stanje, podzemne prostorije, bifurkacije, vremenskaserija, deterministički haos, stohastičnost, perturbacije, vremensko kašnjenje, jačina trenja... i i i i i d V V i 1 2 dt L L (7.14) što je prvobitno predloženo od strane Ruine [1983]. Promena trenja u zavisnosti od početne brzine V0 (pod dejstvom sile), brzine kretanja bloka V i krutosti opruge, K>0, data je u sledećem obliku: 0 d K V V dt ...
... dinamike ponašanja modela pri periodičnoj promeni parametara and : . [ ( ( )) log ] [ ( / ( ))( log )]2 V 1 t V U V 1 V U 1 t V (7.21) gde su (t) i (t) pozitivne periodične funkcije ...
... primarnog značaja (za razliku od Diterihovog zakona gde je vreme imalo primarnu ulogu): ( , ) ln ln 0 0 0 c VV V A B V D ln c c V V D D (4.8) U ovom slučaju, Ruina smatra da bilo ...Srđan D. Kostić. "Nelinearno dinamičko modelovanje potresa izazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2013-11-04)
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Nelinearno dinamičko modelovanje potresa izazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija
Srđan D. Kostić (2013-11-04)U ovoj disertaciji, cilj istraživanja bio je određivanje dinamičkih svojstava potresaizazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija.Analiza potresa izvedena je sa dva aspekta – u prvom delu istraživanja izučavane suvremenske serije oscilovanja tla za vreme potresa, a u drugom delu vršena je analizastabilnosti fenomenološkog Baridž-Knopof modela bloka sa oprugom. Vremenske serijeoscilovanja tla proučavane su primenom postupka analize surogat podataka, kao ikorišćenjem metoda analize nelinearnih vremenskih serija (primena teoreme orazvijanju skalarne vremenske serije). Analiza vremenskih serija izvedena je ...potres, naponsko stanje, podzemne prostorije, bifurkacije, vremenskaserija, deterministički haos, stohastičnost, perturbacije, vremensko kašnjenje, jačina trenja... i i i i i d V V i 1 2 dt L L (7.14) što je prvobitno predloženo od strane Ruine [1983]. Promena trenja u zavisnosti od početne brzine V0 (pod dejstvom sile), brzine kretanja bloka V i krutosti opruge, K>0, data je u sledećem obliku: 0 d K V V dt ...
... dinamike ponašanja modela pri periodičnoj promeni parametara and : . [ ( ( )) log ] [ ( / ( ))( log )]2 V 1 t V U V 1 V U 1 t V (7.21) gde su (t) i (t) pozitivne periodične funkcije ...
... primarnog značaja (za razliku od Diterihovog zakona gde je vreme imalo primarnu ulogu): ( , ) ln ln 0 0 0 c VV V A B V D ln c c V V D D (4.8) U ovom slučaju, Ruina smatra da bilo ...Srđan D. Kostić. "Nelinearno dinamičko modelovanje potresa izazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2013-11-04)
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Geomechanical research for defining terms of performing the first section of waterproof screen in the open pit “Drmno”
Dragana Savić, Majstorović Jelena, Dimitrijević Bojan. "Geomechanical research for defining terms of performing the first section of waterproof screen in the open pit “Drmno”" in Proceedings of the 5. International Geomechanics Conference no. V, Varna, Bulgaria:Scientific and Technical Union of Mining, Geology and Metallurgy (2012): 250-256
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Stabilization And Monitoring Of The Slope Deformation Appearance On Marl Open-Pit Filijala In Order To Minimize The Risk Of Exploitation
Gojković Nebojša, Čebašek Vladimir, Ganić Aleksandar, Milutinović Aleksandar. "Stabilization And Monitoring Of The Slope Deformation Appearance On Marl Open-Pit Filijala In Order To Minimize The Risk Of Exploitation" in Proceedings of the 5th International Geomechanics Conference, Varna:Scientific and Technical Union of Mining, Geology and Metalurgy (2012): 220-227
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Structural, Morphological and Electrical Properties of Multi-Doped Calcium Phosphate Materials as Solid Electrolytes for Intermediate Temperature Solid Oxide Fuel Cells
Mirković Miljana M., Došen Anja M., Erić Suzana P., Stojmenović, Marija D., Matović Branko Z., Rosić Aleksandra A. (2018)Mirković Miljana M., Došen Anja M., Erić Suzana P., Stojmenović, Marija D., Matović Branko Z., Rosić Aleksandra A.. "Structural, Morphological and Electrical Properties of Multi-Doped Calcium Phosphate Materials as Solid Electrolytes for Intermediate Temperature Solid Oxide Fuel Cells" in Science of Sintering 1 no. 50, Beograd:Međunarodni Institut za nauku o sinterovanju (2018): 95-109. https://doi.org/https://doi.org/10.2298/SOS180
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Analogue modelling of strain partitioning along a curved strike-slip fault system during backarc-convex orocline formation: Implications for the Cerna-Timok fault system of the Carpatho-Balkanides
Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović (2021)... 4 b-v 1.5 0.5 Rounded corners 2 9 0 14 5 b-v 1.5 0.5 Rounded corners 2 9 5 14 6 b-v 1.5 0.5 Rounded corners 2 9 10 14 7 b 2 – 90◦ corners 10 9 0 14 8 b 2 – 90◦ corners 10 9 5 14 9 b 2 – 90◦ corners 10 9 10 14 10 b-v 1.5 0.5 90◦ corners 2 9 0 14 11 b-v 1.5 0.5 90◦ corners 2 9 5 14 12 b-v 1.5 ...
... time-scale ratio t* = 5.3∙10−11 calculated as (Hubbert, 1937): t* = 1 γ̇* (1) while shear strain rate ratio γ̇* equals: γ̇* = V* L* (2) where velocity ratio V* = 2.7∙104 means that 2 cm/h in models scales to 0.65 cm/yr in nature, which is consistent with the 60–65 km displace- ment along the ...
... Analogue models of transpressive systems. J. Struct. Geol. 23, 733–743. Cembrano, J., González, G., Arancibia, G., Ahumada, I., Olivares, V., Herrera, V., 2005. Fault zone development and strain partitioning in an extensional strike-slip duplex: a case study from the Mesozoic Atacama fault system ...Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović. "Analogue modelling of strain partitioning along a curved strike-slip fault system during backarc-convex orocline formation: Implications for the Cerna-Timok fault system of the Carpatho-Balkanides" in Journal of Structural Geology, Elsevier BV (2021). https://doi.org/10.1016/j.jsg.2021.104386
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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 ...... considering the calculation of erosion rate, i.e. time derivative of the ground surface elevation, which is supposed equal the product of velocity (v), propagation height (h) and “landslide grow rate” (Er). The latter is independent to the flow velocity and is related by Hungr (1995) to the initial ...
... equation (5) The erosion rate can be modelled as proportional to the product of velocity (v) and propagation height (h). 4 RESULTS DTM of 5x5m resolution is used as main topo file, with 133 452 points. Definition of the source area was ...
... Journal 1977; 82:1013–1024. Pastor, M., Fernández Merodo, J.A., Herreros, I., Mira, P., González, E., Haddad, B., Quecedo, M., Tonni, L., Drempetic, V. (2008) ‘’Mathematical, constitutive and numerical modelling of catastrophic landslides and related phenomena’’. Rock Mech Rock Eng 41:85–132. Pastor ...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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Surface functional groups and degree of carbonization of selected chars from different processes and feedstock
Marija Ilić, Franz-Hubert Haegel, Aleksandar Lolić, Zoran Nedić, Tomislav Tosti, Ivana Sredović Ignjatović, Andreas Linden, Nicolai D. Jablonowski, Heinrich Hartmann (2022)The knowledge ofthe structural and chemical properties of biochars is decisive for their application as technical products. For this reason, methods for the characterization of biochars that are generally applicable and allow quality control are highly desired. Several methods that have shown potential in other studies were used to investigate two activated carbons and seven biochars from different processes and feedstock. The chars were chosen to cover a wide range of chemical composition and structural properties as a hardness ...Biougalj, različiti procesi dobijanja, različite sirovine, površinski aktivne grupe, x-ray, FT-IR,XPS... 100 AC1 1693 1193 827 90 ] —-=AC2 1084 1568 1081 T5756 3412 80 Š š V _Ml potential 1544 70 34197 |artefacts 993 2949 o 60 2914 < 2845 ~ ~ 50 4000 .A\R d "· 494 3500 3000 2500 2000 1500 1000 500 v/cm"! Fig 4. FT-IR spectra of activated carbons ACI and AC2. https://doi.org/10 ...
... 2000 1500 1000 500 v/cm1 b) 100 , —— HW500f untreated 90 X ——> HW500f treated with HCI 80 _ 3198 potential CO, 70 3194 Zi_šifgds j 2914 5 64 2845 s 1 2840 j 503 40 | j 30 _ 20j 7 10 - j 04 ——— ——— Đ | — -——= 4000 3500 3000 2500 2000 1500 1000 500 v/ cm"! Fig 5. FT-IR ...
... 2) 3675 30 | # i i 3) 3650 ~ 60 20% i 1) 3748 kii 2) 3675 101 „ 3) 3649 J 4000 3900 3890 3700 3600 3500 v/cm"1 0 — —— —— ————-{ii, ——— 4000 3500 3000 2500 2000 1500 1000 500 v/ cm" b) 100 4 0) 2)3)4) —— HW1100g untreated 90 —— HW1100g treated with HCI 80 70 1510 60 0000 3900 33@0/;3·3 ...Marija Ilić, Franz-Hubert Haegel, Aleksandar Lolić, Zoran Nedić, Tomislav Tosti, Ivana Sredović Ignjatović, Andreas Linden, Nicolai D. Jablonowski, Heinrich Hartmann. "Surface functional groups and degree of carbonization of selected chars from different processes and feedstock" in PLOS ONE (2022). https://doi.org/10.1371/journal.pone.0277365
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Some Models for Determination of Parameters of the Soil Oscillation Law during Blasting Operations
Lutovac Suzana, Medenica Dragan, Gluščević Branko, Tokalić Rade, Beljić Čedomir. "Some Models for Determination of Parameters of the Soil Oscillation Law during Blasting Operations" in Energies no. Energies 2016, Vol 9, issue 8, 617, Basel, Switzerland:MDPI AG (2016). https://doi.org/doi:10.3390/en9080617
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Paleomagnetism of the Latest Oligocene-Miocene extrusive igneous rocks from the Vardar zone and from the Serbian part of the Pannonian base
Lesić Vesna, Márton Emo, Cvetkov Vesna, Knežević, Tomić Dragana. "Paleomagnetism of the Latest Oligocene-Miocene extrusive igneous rocks from the Vardar zone and from the Serbian part of the Pannonian base" in The 4th International Workshop on the Neogene from the Central and South-Eastern Europe, Slovak Republic, Abstracts and Guide of Excursion, September, 12 – 16, 2011 Banská Bystrica, Slovak Republic, Banská Bystrica:Faculty of Natural Sciences, Matej Bel University (2011): 27-28
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Paleomagnetic and magnetic anisotropy results from Miocene sediments of central and western Serbia
Lesić Vesna, Márton Emo, Cvetkov Vesna, Knežević, Tomić Dragana. "Paleomagnetic and magnetic anisotropy results from Miocene sediments of central and western Serbia" in Оптимално истраживање и одрживо коришћење геолошких ресурса : зборник радова XVI конгреса геолога Србије, Donji Milanovac, 22-25.05.2014. : [(национални конгрес с међународним учешћем)] = Optimal Reserach and Sustainable Usage of the Geological Resou, Beograd:Српско геолошко друштво = Serbian Geological Society (2014): 673-676
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Anthropogenetic influence on ground wather quality: a case of nitrate pollution
Ristić-Vakanjac Vesna, Papić Petar, Damnjanović Vesna, Golubovać Radoslav. "Anthropogenetic influence on ground wather quality: a case of nitrate pollution" in Proccedings of international conference DEGRADRD AREAS & EKOREMEDIATION, Belgrade, Serbia:Faculty of Applied Ecology Futura, Belgrade (2010): 162-171
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Statistical Evaluation of Nitrates in Precipitation and Karst Springflow: The Petnica Spring in Western Serbia
Ristić-Vakanjac Vesna, Papić Petar, Golubović Radisav, Damnjanović Vesna. "Statistical Evaluation of Nitrates in Precipitation and Karst Springflow: The Petnica Spring in Western Serbia" in Technic Technologies Education Management - TTEM 2 no. 8, Sarajevo :DRUNPP (2013): 896-903
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Strain partitioning in a large intracontinental strike-slip system accommodating backarc-convex orocline formation: The Circum-Moesian Fault System of the Carpatho-Balkanides
Nemanja Krstekanić, Liviu Matenco, Uroš Stojadinović, Ernst Willingshofer, Marinko Toljić, Daan Tamminga (2022)oroklini, raspodela deformacija, transkurentna kretanja, Karpato-balkanidi, Cirkum-mezijski rasedni sistem... the intramontane Žagubica Basin (Serbian Carpatho–Balkanides). N. Jb. Geol. Paläont. (Abh.) 256 (2), 141–150. Lesić, V., Márton, E., Gajić, V., Jovanović, D., Cvetkov, V., 2019. Clockwise vertical-axis rotation in the West Vardar zone of Serbia: tectonic implications. Swiss J. Geosci. 112, ...
... faulting: from early concepts to inverse methods. Tectonophysics 581, 206–219. Cembrano, J., González, G., Arancibia, G., Ahumada, I., Olivares, V., Herrera, V., 2005. Fault zone development and strain partitioning in an extensional strike-slip duplex: a case study from the Mesozoic Atacama fault system ...
... geothermal resources. Geothermics 53, 328–352. Iancu, V., Berza, T., Seghedi, A., Gheuca, I., Hann, H.-P., 2005a. Alpine polyphase tectono-metamorphic evolution of the South Carpathians: a new overview. Tectonophysics 410, 337–365. Iancu, V., Berza, T., Seghedi, A., Marunţiu, M., 2005b. Paleozoic ...Nemanja Krstekanić, Liviu Matenco, Uroš Stojadinović, Ernst Willingshofer, Marinko Toljić, Daan Tamminga. "Strain partitioning in a large intracontinental strike-slip system accommodating backarc-convex orocline formation: The Circum-Moesian Fault System of the Carpatho-Balkanides" in Global and Planetary Change, Elsevier BV (2022). https://doi.org/10.1016/j.gloplacha.2021.103714