Претрага
34 items
-
Mapping and classifying large deformation from digital imagery: application to analogue models of lithosphere deformation
kontinentalna tektonika: kompresija, kontinentalna tektonika: ekstenzija, kontinentalna tektonika: transkurentni i transformni rasedi, pukotine, rasedi, zone snažnih deformacija, kinematika deformacija kore i omotača, teorijska mehanika, modelovanje... vectors dx (the deformed quadrilaterals) is determined by: dx = FdX. First row, incremental deformation, second row, cumulative deformation. 2.4 General deformation described with the deformation gradient Any deformation that can be described by F, can be written as a serial combination of a simple shear ...
... vectors dx (the deformed quadrilaterals) is determined by: dx = FdX. First row, incremental deformation, second row, cumulative deformation. 2.4 General deformation described with the deformation gradient Any deformation that can be described by F, can be written as a serial combination of a simple shear ...
... our framework we observe all deformation as distributed, because PIV averages deformation within a certain spatial window. Hence, up to this point, we have described deformation in a continuum approach. For our application, deformation in crustal tectonics, deformation is dominantly localized along ...Taco Broerse, Nemanja Krstekanić, Cor Kasbergen, Ernst Willingshofer. "Mapping and classifying large deformation from digital imagery: application to analogue models of lithosphere deformation" in Geophysical Journal International, Oxford University Press (OUP) (2021). https://doi.org/10.1093/gji/ggab120
-
Gate Road Support Deformation Forecasting Based on Multivariate Singular Spectrum Analysis and Fuzzy Time Series
Luka Crnogorac, Rade Tokalić, Zoran Gligorić, Aleksandar Milutinović, Suzana Lutovac, Aleksandar Ganić (2021)Underground mining engineers and planners in our country are faced with extremely difficult working conditions and a continuous shortage of money. Production disruptions are frequent and can sometimes last more than a week. During this time, gate road support is additionally exposed to rock stress and the result is its progressive deformation and the loss of functionality of gate roads. In such an environment, it is necessary to develop a low-cost methodology to maintain a gate road support system. ...deformacije podgrade, lasersko skeniranje, višekanalna singularna spektralna analiza, prognoza, klasterisanje fuzzy vremenskih serija... to obtain high accuracy deformation data, and multivariate singular spectrum analysis to process them and forecast the future state of deformations. Fuzzy time series is used to classify deformation data into several independent groups with respect to the magnitude of deformation intensity. In this way ...
... type of support that can be used to decrease the progressive deformation. An effective deformation forecast can result in a decrease of costs and delays. There are many different approaches to obtaining future states of support deformation. Ding-Ping Xu et al. [1] compared the predictions from the rock–soil ...
... to obtain high accuracy deformation data, and multivariate singular spectrum analysis to process them and forecast the future state of deformations. Fuzzy time series is used to classify deformation data into several independent groups with respect to the magnitude of deformation intensity. In this way ...Luka Crnogorac, Rade Tokalić, Zoran Gligorić, Aleksandar Milutinović, Suzana Lutovac, Aleksandar Ganić. "Gate Road Support Deformation Forecasting Based on Multivariate Singular Spectrum Analysis and Fuzzy Time Series" in Energies, MDPI (2021). https://doi.org/https://doi.org/10.3390/en14123710
-
Natural two-dimensional pyrophyllite: Nanoscale lubricant, electrical insulator and easily-machinable material
Borislav Vasić, Radoš Gajić, Ivana Milošević, Žarko Medić, Marina Blagojev, Marko Opačić, Aleksandar Kremenović, Dejan Lazić (2022)Pyrophyllite, with the chemical formula Al2Si4O10(OH)2, is a naturally occurring and abundant van der Waals mineral belonging to the group of phyllosilicates. It is very soft, layered crystal used for sculpting and an excellent electrical and thermal insulator aimed for the operation at high pressure and temperature. Here, for the first time, two-dimensional (2D) pyrophyllite obtained by both mechanical and liquid phase exfoliation is presented and investigated at the nanoscale. The layered structure provides low friction coefficient of around ...Atomic force microscopy, Insulating properties, Nanofriction and wear, Natural two dimensional materials, Phyllosilicates, PyrophylliteBorislav Vasić, Radoš Gajić, Ivana Milošević, Žarko Medić, Marina Blagojev, Marko Opačić, Aleksandar Kremenović, Dejan Lazić. "Natural two-dimensional pyrophyllite: Nanoscale lubricant, electrical insulator and easily-machinable material" in Applied Surface Science, Elsevier BV (2022). https://doi.org/10.1016/j.apsusc.2022.155114
-
Steel Arch Support Deformations Forecast Model Based on Grey–Stochastic Simulation and Autoregressive Process
Relatively large deformations of the steel arch support in underground coal mines in the Republic of Serbia present one of the main problems for achieving the planned production of coal. Monitoring of the critical sections of the steel arch support in the underground roadways is necessary to gather quality data for the development of a forecasting model. With a new generation of 3D laser scanners that can be used in potentially explosive environments (ATEX), deformation monitoring is facilitated, while ...čelična podgrada, prognoza deformacija, vremenske serije, grey-stohastička simulacija, autoregresija, podzemni rudnik ugljaLuka Crnogorac, Suzana Lutovac, Rade Tokalić, Miloš Gligorić, Zoran Gligorić. "Steel Arch Support Deformations Forecast Model Based on Grey–Stochastic Simulation and Autoregressive Process" in Applied Sciences, MDPI AG (2023). https://doi.org/10.3390/app13074559
-
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, ...... tensie strength = -0.238 MPa mb |6.017 uniaxial compressive strength = 9.938 MPa– _—ccC= 42 global strength = 23.859 MPa s |D.O0205 40 'deformation modulus = 18951.58 MPa a |0.502. 381 Failure Enivelope Range: _ 3 Application: Tunneh - Š 34 siglmax|6.0705 —]MPa š 32 UnitWeight|0.023 | MN/m3 ...
... Hoek-Brown Classification |E I 56 intact uniaxial comp. strength (sigci) = 70 MPa 55\65_3 | s GSI=65 mi=21 Disturbance facto(D)=0 mi|21 ~ “ intact modulus (Ei) = 30000 MPa pD|o = e 52. Hoek-Brown Criterion -| 50. mb=6017 s=0.0205 a=0.502 G Ei|30000 —JMPa % Mohr-Coulomb Fit cMW[ _— a cohesion = 2 ...Aleksandar Milojević. Tehnologija izrade i opremanje magacina eksploziva za potrebe ležišta bakra, 2024
-
Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels
Irina Zahirovic, Dušan Danilović, Milica Šuput Vranjin, Miloš Tripković. "Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels" in SPE Journal (2023)
-
Some models for determination of parameters of the soil oscillation law during blasting operations
... elastic waves: cp = 6661.00 m/s ‚ velocity of transverse elastic waves: cs = 2852.67 m/s Energies 2016, 9, 617 11 of 15 ‚ dynamic elasticity modulus: Edin = 62.46 GPa ‚ dynamic Poisson’s ratio: µdin = 0.39 GPa 4.2.2. Method of Blasting in the Kovilovača Open Pit Measurements of seismic shocks ...Suzana Lutovac, Dragan Medenica, Branko Gluščević, Rade Tokalić, Čedomir Beljić. "Some models for determination of parameters of the soil oscillation law during blasting operations" in Energies, Basel, Switzerland : MDPI (2018). https://doi.org/10.3390/en9080617
-
Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit
... - velocity of longitudinal elastic waves cp = 6,661.00 [m/s] - velocity of transverse elastic waves cs = 2,852.67 [m/s] - dynamic elasticity modulus Edin = 62.46 [GN/m2] - dynamic Poisson's ratio μdin = 0.39 [GN/m2] 4.2 Blasting Method Measurements of seismic shocks at the ”Kovilovača” ...Suzana Lutovac, Nebojša Vidanović, Čedomir Beljić, Zoran Gligorić. "Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit" in Mining and Metallurgy Engineering Bor, Bor : Mining and Metallurgy Institute Bor (2015). https://doi.org/10.5937/MMEB1503053L
-
Верификација етажних транспортера на угљеном систему – површински коп Дрмно
Тамара Андрејевић (2024)У савременом рударству, површински копови угља наилазе на различите проблеме које треба превазићи зарад добијања потребне количине угља. Као највећи потрошачи овог енергента јављају се термоелектране, где на основу овога можемо да закључимо колико су блиско повезани добра и континуирана производња на површинском копу и рад термоелектрана. Са циљем да се обезбеди стабилна и континуирана производња, потребно је да се направи добар одабир транспортера. У овом раду, за потребе верификације затезне чврстоће траке и снаге погона транспортера, коришћен је ...... (L) 3249.3 m Belt Reinforcement Fibre Steel Time for 1 Revolution 624.9 sec Belt Width 1800 mm Belt Load Area and Capacity at 960kg/m3 Belt Modulus 144000 kN/m Minimum Rec. Edge Distance 122 mm Cord Diameter 0.0 mm Actual Edge Distance Low BD 314 mm Cord Pitch 0.0 mm Load Burden Depth 282 mm ...Тамара Андрејевић. Верификација етажних транспортера на угљеном систему – површински коп Дрмно, 2024
-
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... koja će biti korišćena u geostatičkim proračunima, se usvaja cu=10 kPa. 26 De pt h [m] SDMT Main Results Material Index Constrained Modulus Undr. Shear Strength Frietion Angle Horizontal Stress Index Shear Wave Velocity 2 | cLAY |syyr| SAND ii o o LEwI o ı || | | | | 2 H| > > > Ll ...Vojislav Lučić. Specifičnosti izgradnje deonice 3 brze saobraćajnice Požarevac-Golubac na organskom tlu, 2024
-
Konstitutivne zavisnosti komunalnog otpada sa deponija u Srbiji
Dragoslav Rakić (2013-05-10)U disertaciji su prikazani rezultati laboratorijskih ispitivanja uzoraka komunalnogotpada dobijeni u aparatima za direktno smicanje i edometarskim aparatima (jedanedometarski aparat konstruisan je za potrebe ove disertacije). Sva ispitivanja su izvršenana veštački pripremljenim uzorcima, uz uvažavanje preporuka koje se odnose nadimenzije korišćenih aparata i veličinu najvećih frakcija u uzorku (EN 1997-2, ASTM2007-a, 2007-b). Za formiranje uzoraka korišćen je komunalni otpad različite starosti,uzet sa dve deponije u Srbiji (Ade Huje u Beogradu i gradske deponije u Novom Sadu).Interpretacija rezultata dobijenih iz ...komunalni otpad, deponija, geotehnička klasifikacija, čvrstoća smicanja,deformabilnost, indeks primarne kompresije, indeks sekundarne kompresije, modelisleganja... n index (Cα) and modified secondary compression index (Cα'), primary compression index (Cc) and modified primary compression index (Cc'), and modulus of compressibility (Mν). The shear strength and deformability parameters were compared for verification to relevant data in published literature ...
... in microbiology and biotechnology. Part 2. Application aspects. Biotechnol. Adv., 25, 99-121. Singh, M.K. (2008). Characterization of stress-deformation behaviour of municipal solid waste, Ph.D. thesis, University of Saskatchewan, Saskatoon, Canada, 292. Skempton, A.W. & Petley, J. (1970). Ignition ...Dragoslav Rakić. "Konstitutivne zavisnosti komunalnog otpada sa deponija u Srbiji" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2013-05-10)
-
Konstitutivne zavisnosti komunalnog otpada sa deponija u Srbiji
Dragoslav Rakić (2013-05-10)U disertaciji su prikazani rezultati laboratorijskih ispitivanja uzoraka komunalnogotpada dobijeni u aparatima za direktno smicanje i edometarskim aparatima (jedanedometarski aparat konstruisan je za potrebe ove disertacije). Sva ispitivanja su izvršenana veštački pripremljenim uzorcima, uz uvažavanje preporuka koje se odnose nadimenzije korišćenih aparata i veličinu najvećih frakcija u uzorku (EN 1997-2, ASTM2007-a, 2007-b). Za formiranje uzoraka korišćen je komunalni otpad različite starosti,uzet sa dve deponije u Srbiji (Ade Huje u Beogradu i gradske deponije u Novom Sadu).Interpretacija rezultata dobijenih iz ...komunalni otpad, deponija, geotehnička klasifikacija, čvrstoća smicanja,deformabilnost, indeks primarne kompresije, indeks sekundarne kompresije, modelisleganja... n index (Cα) and modified secondary compression index (Cα'), primary compression index (Cc) and modified primary compression index (Cc'), and modulus of compressibility (Mν). The shear strength and deformability parameters were compared for verification to relevant data in published literature ...
... in microbiology and biotechnology. Part 2. Application aspects. Biotechnol. Adv., 25, 99-121. Singh, M.K. (2008). Characterization of stress-deformation behaviour of municipal solid waste, Ph.D. thesis, University of Saskatchewan, Saskatoon, Canada, 292. Skempton, A.W. & Petley, J. (1970). Ignition ...Dragoslav Rakić. "Konstitutivne zavisnosti komunalnog otpada sa deponija u Srbiji" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2013-05-10)
-
Multiple-Criteria Decision-Making in Mine Development Planning
Sanja Bajić (2023)The Borska Reka ore deposit is an experimental location where developed methodologies have been applied. It is the largest ore body within the Bor mining complex, which has been the subject of numerous studies and analyses for more than three decades. The paper focuses on the application of FAHP and the VIKOR method to address ranking of alternatives and select the optimal mining method by means of fuzzy multicriteria optimization.Sanja Bajić. "Multiple-Criteria Decision-Making in Mine Development Planning" in Proceedings of the 5th International Underground Excavations Symposium, 5-6-7 June 2023, Istanbul, Topkapi : Dinç Ofset Mat. Rek. San. ve Tic. Ltd. Şti. (2023)
-
Model inteligentnog sistema adaptivnog upravljanja procesom prerade rude
Ivana M. Jovanović (2016-01-13)U oblasti procesa prerade rude, flotacijska koncentracija predstavlja jednu od najznačajnijih i najčešće primenjivanih metoda separacije korisnih od nekorisnih minerala. Samim tim, veoma je važno osigurati uspešan rad flotacijskog postrojenja kroz dostizanje zadovoljavajućih tehno-ekonomskih pokazatelja. Cilj upravljanja procesom flotacijske koncentracije je upravo optimizacija kvaliteta i iskorišćenja korisne komponente u koncentratu uz maksimizaciju profita. Shodno tome, istraživanja na polju modelovanja i upravljanja ovim procesom zauzimaju značajno mesto u praksi kontolnog inženjenringa.Teorijska istraživanja u okviru doktorske disertacije obuhvatila su analizu položaja ...flotacijska koncentracija, modelovanje, upravljanje, inteligentni sistem, soft kompjuting, fazi logika, veštačke neuronske mreže... zbog čega je, gotovo redovno potrebno primeniti šemu sa višestepenim prečišćavanjem. 3.0 MODELOVANJE FLOTACIJSKIH PROCESA Model (od lat. modulus – mala mera) u užem smislu predstavlja opis nekog sistema, procesa, ili fenomena, koji uzima u obzir poznata (kao i pretpostavljena) svojstva, ...Ivana M. Jovanović. "Model inteligentnog sistema adaptivnog upravljanja procesom prerade rude" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-01-13)