Претрага
934 items
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Tehnologija izrade i opremanje magacina eksploziva za potrebe ležišta bakra
Aleksandar Milojević (2024)Nakon radova otvaranja i početka eksploatacije, rudno telo bakra velikih rezervi zahteva i veliku količinu eksploziva da bi se ostvario zacrtan kapacitet. Samim tim, neophodno je izraditi funkcionalan magacin eksploziva koji će biti pristupačan svim horizontima i koji će moći da ispuni celokupni kapacitet svih horizonata. Obzirom da će se u magacinu skladištiti eksploziv, on mora ispunjavati specijalne uslove kako bi skladištenje bilo bezbedno. Neophodno je isprojektovati magacin tako da ispuni sve zahteve po pitanju količine i načina skladištenja eksploziva, ...... bušenje - O [} [= -| o = > d -| -| s = | = s n a | |e S | e = S = P 5 l e l e oO Z = | - | | d = o [5] d Š _ |_ —~ ' S G | B l e = o | > = S O o O l o Z l e | w d d R rik=| - i ii M |wn |- d .m H E O E s o 2 R ...
... 25. Troškovi radne snage – Fs F| = o H &R | 85 5 =s9 5 y- ·B B.9 : ' -UNB:B- 8 E i Š I ISE| ;S e E PIBNE-E" ·= E el e i I d Š RER| E F > Š NN= O 5 |s d r G 5 a o d F Ni r Bra Na Ui Ca [0] [0] 60 m' meseci | radnika | r.d./Ćmes | nadnica | m/nad | nad/m | USD/ USD USD nad /m 10,29 | ...
... izrade prostorija u maksimalnoj dužini od 20 m neophodno je izvršiti podgrađivanje, a u cilju sprečavanja oksidisanja stene. Ugradnja torkret betona marke MB30 (Tabela 4.10) vrši se odgovarajućom mehanizovanom opremom. Takođe, ugradnja ankerne podgrade (ankera dužine 2,5 m) obavlja se mehanizovanom ...Aleksandar Milojević. Tehnologija izrade i opremanje magacina eksploziva za potrebe ležišta bakra, 2024
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Geotechnical effects of municipal solid waste destruction with different compaction methods
Jovana M Janković Pantić, Dragoslav R Rakić, Irena G Basarić Ikodinović, Tina D Đurić, Gordana Hadži-Niković (2022)Disposal of waste in municipal solid waste landfills is the only way of waste disposal in Serbia, with daily compaction and covering with soil material. Due to less space for the construction of new landfills, it is necessary to use their maximum capacity. Well-compacted municipal solid waste takes up less volume and enables safer storage, so it is useful to previously determine the compaction parameters in the laboratory: maximum dry unit weight (γdmax) and optimal water content (wopt). In ...Jovana M Janković Pantić, Dragoslav R Rakić, Irena G Basarić Ikodinović, Tina D Đurić, Gordana Hadži-Niković. "Geotechnical effects of municipal solid waste destruction with different compaction methods" in Доклади на Българската академия на науките Comptes rendus de l’Acad´emie bulgare des Sciences (2022). https://doi.org/10.7546/CRABS.2022.01.13
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Adsorption and Polymerization of Aniline on Cu(II)-Montmorillonite: Vibrational Spectroscopy and ab Initio Calculation
Batch adsorption experiments in the presence of oxygen were performed to study the interlayer reactions of aniline on Cu(II)-montmorillonite in aqueous solutions. At concentrations below a critical value of CC ) 2.6 mmol dm-3 only a colored Cu(II)-aniline complex is formed, characterized by a stability constant of log(Kassoc/dm3 mol-1) ) 1.5. At concentrations beyond Cc aniline polymerizes yielding a dark brown product, which is identified by two vibrational spectroscopy techniques, attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy and ...M. Ilić, E. Koglin, A. Pohlmeier, H. D. Narres, M. J. Schwuger. "Adsorption and Polymerization of Aniline on Cu(II)-Montmorillonite: Vibrational Spectroscopy and ab Initio Calculation" in Langmuir (2000). https://doi.org/ 10.1021/la000534d
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Groundwater resources for drinking water supply in Serbia´s Southeast Pannonian basin
Dušan Polomčić, Bojan Hajdin, Marina Ćuk, Petar Papić, Zoran Stevanović. "Groundwater resources for drinking water supply in Serbia´s Southeast Pannonian basin" in Carpathian Journal of Earth and Environmental Sciences (2014)
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Use of the 3D laser scanning while controlling the geometry of elements of bucket wheel escavator
Milošević Dragan, Pantić Marko, Stojaković Miša, Ganić Aleksandar, Milutinović Aleksandar. "Use of the 3D laser scanning while controlling the geometry of elements of bucket wheel escavator" in Energetsko rudarstvo, nove tehnologije, održivi razvoj : zbornik radova = Energy Mining, New Technologies, Sustainable Development : proceedings / III međunarodni simpozijum Energetsko rudarstvo 2010, 08-11. Septembar, 2010, Banja Junaković, Apatin = 1, Beograd:Rudarsko-geološki fakultet, Beograd (2010): 304-311
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Tailoring of Multifunctional KAlSiO4 - KAlSi2O6 Based Ceramic Materials
Antić Bratislav, Bošković Marko, Vulić Predrag, Spasojević Vojislav, Kremenović Aleksandar. "Tailoring of Multifunctional KAlSiO4 - KAlSi2O6 Based Ceramic Materials" in YUCOMAT 2012 : Programme and the book of abstracts / Fourteenth Annual Conference, Herceg Novi, September 3-7, 2012, Belgrade:Materials Research Society of Serbia (2012): 54-54
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Using autonomous GNSS senzors in monitoring of slow moving landslides-a case study
Abolmasov Biljana, Milenković Svetozar, Pejić Marko, Stepanović Goran, Gospavić Zagorka. "Using autonomous GNSS senzors in monitoring of slow moving landslides-a case study" in Proceedings of the International Conference EngeoPro 2011, Moscow, Russia:IAEG, Russian IAEG National Group (2011): 266-270
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Applying terrestrial laser scanning in geotechnical engineering
Bogdanović Snežana, Marjanović Miloš, Abolmasov Biljana, Đurić Uroš, Pejić Marko. "Applying terrestrial laser scanning in geotechnical engineering" in Proceedings of 4th International Symposium of Macedonian Association for Geotechnics 1 no. 1, Struga, FYROM:Faculty of Civil Engineering, Skopje, Republic of Macedonia (2014): 337-342
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The Analysis of landslide dynamics based on GNSS monitoring-A case study
Abolmasov Biljana, Milenković Svetozar, Jelisavac Branko, Pejić Marko, Radić Zoran. "The Analysis of landslide dynamics based on GNSS monitoring-A case study" in Proceedings of XII IAEG Congress, Italy, Torino 2 no. 1, :Springer International Publishing (2014): 143-146
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Permanent geodetic monitoring of the Umka Landslide using GNSS techonology and GeoMoss system
Erić Verica, Božić Branko, Pejić Marko, Abolmasov Biljana, Pandžić Jelena. "Permanent geodetic monitoring of the Umka Landslide using GNSS techonology and GeoMoss system" in Abstract book - 2nd Regional Symposium on Landslides in the Adriatic-Balkan Region - 2nd ReSyLAB 2015 1 no. 1, Beograd, Srbija:University of Belgrade, Faculty of Mining and Geology, Belgrade (2015): 39-39
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Permanent geodetic monitoring of the Umka Landslide using GNSS techonology and GeoMoss system
Erić Verica, Božić Branko, Pejić Marko, Abolmasov Biljana, Pandžić Elena. "Permanent geodetic monitoring of the Umka Landslide using GNSS techonology and GeoMoss system" in Procedings of 2nd Regional Symposium on Landslides in the Adriatic-Balkan Region - 2nd ReSyLAB 2015 1, Beograd:Rudarsko-geološki fakultet Univerziteta u Beogradu (2017): 43-48
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Crystal structure of mineral cosalite from Trepča orefield
Predrag Dabić, Sabina Kovač, Aleksandar Kremenović, Aleksandar Pačevski, Marko Rodić. "Crystal structure of mineral cosalite from Trepča orefield" in XXIV Konferencija Srpskog kristalografskog društva, Izvodi radova, Novi Sad:Srpsko kristalografsko društvo (2017): 54-55
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Jointed rock mass characterization using field and point-cloud data
Marjanović Miloš, Pejić Marko, Đurić Uroš, Krušić Jelka, Abolmasov Biljana. "Jointed rock mass characterization using field and point-cloud data" in Geomechanics and Geodynamics of Rock Masses. Proceedings of the 2018 European Rock Mechanics Symposium. 1, :CRC Press, Taylor and Francis Group (2018): 319-324
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Analitičko Hijerarhijski Proces primenjen za selekciju hidrauličnih bagera na površinskim kopovima
Đenadić Stevan, Miletić Filip, Jovančić Predrag, Janković Ivan, Lazić Marko. "Analitičko Hijerarhijski Proces primenjen za selekciju hidrauličnih bagera na površinskim kopovima" in Zbornik radova, VIII Međunarodna konferencija OMC 2018, Zlatibor, 17-20 oktobar, 2018, Belgrade:Jugoslovenski komitet za površinsku eksploataciju (2018): 14-22
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Monitoring of erosion in the area of Đavolja Varoš: Project “MEĐA”
Đurić Uroš, Pejić Marko, Marjanović Miloš, Đurić Dragana, Krušić Jelka. "Monitoring of erosion in the area of Đavolja Varoš: Project “MEĐA”" in Abstract Book 17th Serbian Geological Congress, May 17‐20, Vrnjačka Banja 2, Beograd:Srpsko geološko društvo (2018): 780-785
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Determination of Mechanical Properties of Altered Dacite by Laboratory Methods
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 ...... secondary minerals are calcite, sericite, chlorite, and iron oxides/hydroxides. Mineralogical-petrographic analysis of D and AD samples showed that sanidine and quartz predominate in D. The strength parameters of the rock material are affected mainly by the content and size of quartz crystals. So, as the ...
... Geotech. Eng. 2008, 13, 1–10. 5. Liu, J.; Wang, E.; Song, D.; Wang, S.; Niu, Y. Effect of rock strength on failure mode and mechanical behavior of composite samples. Arab. J. Geosci. 2014, 8, 4527–4539. [CrossRef] 6. Berisavljević, Z.; Berisavljević, D.; Čebašek, V. Shear strength properties of Dimitrovgrad ...
... ; Hoek, E. Underground Excavations in Rock; CRC Press: London, UK, 1980. 21. Tan, Y.-Y.; Zhang, K.; Yu, X.; Song, W.-D.; Wang, J.; Hai, C.-L.; Tan, Y.-Y.; Zhang, K.; Yu, X.; Song, W.-D.; et al. The Mechanical and Microstructural Properties of Composite Structures Made of a Cement-Tailing Backfill and ...Veljko Rupar, Vladimir Čebašek, Vladimir Milisavljević, Dejan Stevanović, Nikola Živanović. "Determination of Mechanical Properties of Altered Dacite by Laboratory Methods" in Minerals, MDPI AG (2021). https://doi.org/10.3390/min11080813
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Design of a sucker rod pumping system
Ana Ponoćko (2024)For a long time in the history of oil production, sucker rod pumps have been the first and in many cases the only choice when it comes to mechanical extraction methods. Proper selection of each individual element of the system enables optimization, which entails benefits in the form of increased efficiency and reduced costs. The first part of the paper presents the underground and surface equipment of the rod pump and describes the operation of the entire system. The ...... API Class D: Generally contains more manganese and chromium than Class K. Used in deep wells or wells with very high loads. Class D is made to withstand medium to very heavy loads in non-corrosive (inhibited) conditions and is further categorized by quality: D-carbon, D-alloy, D-special (AISI ...
... INPUT DATA CALCULATED RESULTS (TOTAL SCORE: 53% GRADE: F) Taraet Prod.(m"D): — 11 Fluid level Production rate (m"/D): 10.9 Peak pol.pod ioad (N): · 24758 Run time (hrs/day): — 24.0 (mfrom surtace): - 120 'Oš production (m"/D): 2,6 Min. pol.rodioad (N): — 13944 Tubina pres. (kPa): | 600 (mover pump): ...
... Position .00 mm “ 57.150 mm - 2.875" (6.40 Ibyft) 2.441" ID . Lj No - Steel Rods * d 76 Hi D = =s = -i “6 o 200 460 s #oc 1006 Position (mm) 00kg 996.000 kgim*3 Torque 6.00 bar 208G 6 °°°h1°D' g 1500 0500% |Ž 100 85.00 % – 0080bar |E i -50C -1000 o 100 200 300 400 Angle ...Ana Ponoćko. Design of a sucker rod pumping system, 2024
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Specifičnosti izgradnje deonice 3 brze saobraćajnice Požarevac-Golubac na organskom tlu
Vojislav Lučić (2024)U ovom završnom radu prikazani su podaci koji se odnose na metode ojačanja terena izgrađenog od slabonosivog organskog tla, kao i njegove geotehničke karakteristike na primeru šireg istražnog prostora, u okolini sela Kumane duž trase treće dionice brze saobraćajnice Požarevac-Golubac. U radu su prvo prikazane osnovne karakteristike i podele organskog tla i treseta, zatim su navedene metode ojačanja tla koje mogu da se koriste na datom istražnom prostoru i na kraju je izvršena analiza i interpretacija rezultata geotehničkih istraživanja ...organsko tlo, treset, metode ojačanja slabonosivog tla, slieganje, konsolidacija i vremenski tok konsolidacije... 10000 S•e = 22.487 cm BRZINA KONSOLIDACIONOG SLIJEGANJA U=90%= Ty = 0.848 Cy * too d? Tv * d? c Ty = too — 0.848 * 2202 ., t90 _ — 2 0.001 “ s too * 475d SEKUNDARNA KONSOLIDACIJA t = 5000 d t? Ss =HPt*Ca*logt_ 90 47 5000 ss = 4.4x* 0.01 + log 475 s. = 4.498 cm UKUPNO ...
... 13.818 cm BRZINA KONSOLIDACIONOG SLIJEGANJA U = 90% = T, = 0.848 Cy * tog T, = P T, * d? too = |A 0.848 * 957 t90 _ ——— 2 0.001 s too * 89 d 55 SEKUNDARNA KONSOLIDACIJA t = 5000 d t? Ss =HPt*Ca*logt_ 90 000 89 5 s. = 1.9*0.01 +log S. = 3.324 cm UKUPNO SLIJEGANJE ...
... do tačke D, uslijed izgradnje trajnog objekta (pri čemu Je ovo povećanje manje od napona oo+40o-), tada Jje slijeganje, tj. promjena koeficijenta poroznosti /e” mnogo manja od promjene koeficijenta poroznosti /e za isti interval napona (tačka A do tačke E). Poželjno je da se tačka D nalazi unutar ...Vojislav Lučić. Specifičnosti izgradnje deonice 3 brze saobraćajnice Požarevac-Golubac na organskom tlu, 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 ...... Fougerouse, D., Reddy, S. M., Saxey, D. W., Rickard, W. D. A., van Riessen, A., Micklethwaite, S. (2016): Nanoscale gold clusters in arsenopyrite controlled by growth rate not concentration: Evidence from atom probe microscopy. American Mineralogist, 101, 1916-1919. Fougerouse, D., Micklethwaite ...
... uzorcima SST2017/04 (a) i SST2017/06 (b-d) (a-d — odbijena svetlost, vazduh, //N). a) Prorastanje grubozrnih sfalerita (Sp), galenita (Gn), arsenopirita (Apy) i pirita (Py); b) kontakt arsenopirita (Apy) i sfalerita (Sp); c) arsenopirtski deo uzorka; pirit (Py); d) sfaleritski deo uzorka sa orijentisanim ...
... 1 (a-c) i Trepča 2 (d) (a-d — odbijena svetlost, vazduh, //N). a) Pojava arsenopirita (Apy), galenit (Gn) i sfalerit (Sp) u vidu prorastanja; b) asocijacija arsenopirita, halkopirita (Ccp) i sfalerita; c) pojava markasita (Mrc) u asocijaciji sa sfaleritim (Sp) i piritom (Py); d) masivni agregat a ...Ivana N. Jelić. Arsenopirit iz rudnih ležišta Šumadijsko-kopaoničke oblasti: paregeneza, sastav i produkti oksidacije, Beograd : [I. Jelić], 2023
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Препреке декарбонизацији система даљинског грејања у Србији - ставови представника топлана
Производња топлоте у системима даљинског грејања у Републици Србији тренутно се заснива искључиво на процесима сагоревања, с доминантним уделом природног гаса из увоза. Иако су технологије за коришћење обновљивих и алтернативних извора енергије добро познате, њихова примена у системима даљинског грејања у Републици Србији још увек је занемарљива (око 2%). Како би се убрзао и олакшао процес транзиције ка обновљивим изворима енергије и разумело тренутно стање и перспектива, спроведена је анкета међу представницима топлана Србији. Циљ је био ...Марија Живковић, Дејан Ивезић, Бобан Павловић, Дејан Стојановић. "Препреке декарбонизацији система даљинског грејања у Србији - ставови представника топлана" in Стручно-научна конференција ТОПС 2024, Златибор, Јун 2024, Пословно удружење "Топлане Србије" (2024)