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Упит dcterms_subject_txt:Crustal stress

121 items

  • Non-Detonating Chemical Mixture for Non-Invasive Methods of Rock Breaking

    Lazar Kričak, Milanka Negovanović, Nikola Simić, Stefan Milanović (2024)
    Within the Innovation developed several different non-detonating chemical mixtures for non-invasive methods of rock breaking. Laboratory and polygon tests gave the satisfactory results and knowledge enough to start the practical experiments in the field. The basis of this innovation is a theoretical assumption that certain chemical mixtures release a large quantity of gases during combustion. If these gases are found in the enclosed space a growing pressure on the walls of the chamber in which combustion takes place will ...
    non-detonating, chemical mixture, rock breaking, borehole pressure

  • 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)
    analogno modelovanje, raspodela deformacija, geometrija indentera, Černa i Timok rasedni sistem
    ... this depth the vertical stress (i.e., lithostatic stress, σ = ρ∙g∙h, where ρ is quartz sand density, g is gravitational acceleration and h is the thickness of overlying sand layer) in the experiments is 220 Pa, corresponding to 280 MPa in nature, which results in a stress-scale ratio of 7.87∙10−7 ...
    ... formation of transtensional/extensional basins. We investigate how these structurally distinct domains are kinematically linked by the means of a crustal-scale analogue modelling approach where a deformable crust is moved against a stable and rigid indenter. The modelling demonstrates that the geometry ...
    ... 1c, the Getic Depression of Răbăgia et al., 2011; Krezsek et al., 2013). 3. Methodology 3.1. Modelling approach We present a series of 12 crustal scale analogue experiments that portray deformation of the upper to middle crust around a rigid indenter as a consequence of translation and rotation ...

  • Стабилизација косине приступног пута у југоисточном делу површинског копа „Ћерамиде“

    Никола Анђелић (2024)
    Експлоатација дацита као техничког камена се на површинском копу "Ћерамиде" врши дисконтуалном технологијом уз примену бушачко-минерских радова и високо капацитативне и габаритне опреме. Примане наведене технологије захтева стабилне и безбедне транспортне путеве како би се планирана производња и реализовала. Услед клизишта које је настало у зони главног извозног пута на површинском копу дацита "Ћерамиде" неопходно је обезбедити одговарајуће техничко решење којим би се косина пута довела у стабилно стање. У том смислу предложено је техничко решење са насипањем косине ...
    дацит, површинска експлоатација, стабилност косина, Бисхоп
    ... ss (M Pa ) Ma jo r Pr in ci pa l St re ss (M Pa ) - Normal Stress (MPa) — Dacit - Ceramide - Principal Stress Envelope !J–—YZ_ — Dacit - Ceramide -– Shear vs. Normal Stress Envelope Minor Principal Stress (MPa) Slika 1.8. Parametri stenskog masiva dacita (dacit 1 faze) na površinskom ...
    ... Normal Stress (MPa) e Epvdops Rv opiceonceni Mapcesam Sh ea r St re ss (M Pa ) Ma jo r Pr in ci pa l St re ss (M Pa ) Dacit alterisan – Ceramide - Principal Stress Envelope | Dacit alterisan - Ceramide – Shear vs. Normal Stress Envelope – 2 3 4 Minor Principal Stress (MPa) ...

  • Geotehnički aspekti izgradnje visećeg pešačkog mosta u Starom gradu u Užicu

    Zoran Berisavljević, Miloš Marjanović, Uroš Đurić (2023.)
    U radu su prikazani rezultati geotehničkih istraživanja za potrebe izgradnje visećeg pešačkog mosta preko klisure reke Đetinje u Užicu. Predviđeno je da most, sistema prednapregnute trake, omogući prelaz pešacima sa desne dolinske strane na stranu Starog grada, koja je opasana strmom liticom (cca. 40 m visine). Za potrebe formiranja geotehničkog modela i strukturnog sklopa krečnjačke stenske mase korišćen je postupak fotogrametrijskog snimanja dronom. Predviđeno je da se zatežuća sila (od oko 30 MN), koju most prenosi na obalni stub, ...
    fotogrametrija, stabilnost kosina, pukotine, prednapregnuta sidra, test granične nosivosti, paker (Ližonov) test
    ... pešačkog mosta preko klisure reke Đetinje kod Starog grada u Užicu. Rasponska konstrukcija mosta je statičkog sistema prednapregnute trake - tzv. *stress ribbon“. Sastoji se od podužnih ovešenih čeličnih kablova koji nose kolovoznu ploču male debljine. Kolovozna ploča je formirana od montažnih armi ...
    ... ispitivanja sidra br. 2 4.2. Analize stabilnosti Kako bi se procenila stabimost obalnih stubova usled dejstva sile tzv. prednapregnute trake (stress ribbon) izvršena je naponsko-deformacijska analiza metodom konačnih elemenata (MKE). Prilikom proračuna korišćen je program RS2 [4] koji je namenjen ...

  • Correlation Between Dynamic CBR and Compaction and Bearing Capacity of Pavement Foundation Layers

    Milan Bogdanović, Snežana Bogdanović, Dragoslav Rakić, Irena Basarić Ikodinović (2024)
    This paper presents a dynamic California Bearing Ratio (CBRd) device that can be used on a prepared pavement foundation layer to obtain a certain parameter of the tested material in the laboratory and in situ in a direct and fast way. For the selected natural material (gravel), it is shown that the laboratory CBRd can be used to estimate the compaction and bearing capacity, because it correlates well with the parameters of the standard and modifed Proctor compaction tests. ...
    korelacija parametara, donji slojevi saobraćajnica, laboratorijska i terenska ispitivanja, dinamički kalifornijski indeks nosivosti CBRd
    ... Several factors can affect the measured CBR, value, including the falling weight, height offall, size (di- ameter) of the plate, plate contact stress, type and location of deflection transducer, use of load transducer, loading speed, and material strength [9, 10]. The tests with the CBR,„ device ...
    ... perform the test. A plate with a diameter of 500 mm was used to determine the modulus of deformation, and the load was increased until a normal stress of 0.5 MN/m? was reached below the plate. Before the test started, the load transducer and the number gauge or transducer were set to zero. Sub- ...

  • Molecular and Isotope Composition of Biomarkers in Immature Oil Shale and its Liquid Pyrolysis Products (Open and Closed System)

    Gordana Gajica, Aleksandra Šajnovic, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević, Ksenija Stojanović (2021)
    The molecular and isotopic composition of biomarkers in initial bitumen isolated from raw immature oil shale samples from the Lower Miocene Aleksinac Basin (Serbia) and liquid products (LPs) obtained by pyrolysis in open (OS) and closed systems (CS) are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in LPs is determined. The molecular composition of the LPs from the OS pyrolysis is very similar to those in initial bitumen, independently ...
    ... Therefore, OS pyrolysis can be useful for assessment of source and depositional environment of OM. Pyrolysis in the CS caused more intense thermal stress; therefore the source fingerprints notably disappear. The obtained results indicate that n-alkan-2-ones and fatty acids methyl esters are applicable ...

  • Tectonothermal evolution of an asymmetric extensional system: the Juhor Mts in Central Serbia (Northern Serbomacedonian massif)

    Miloš Radonjić, Uroš Stojadinović, Elco Luijendijk, Dejan Radivojević, Željko Golubović, Nikola Vuković (2018)
    асиметрична екстензија, панонски басен, српско‐македонски масив, термохронологија
    ... http://dx.doi.org/10.1007/s00531‐015‐1266‐z.  Bada, G., Horváth,  F., Dövényi,  P.,  Szafián,  P., Windhoffer, G., Cloetingh,  S.,  2007.  Present‐day  stress field  and  tectonic inversion in the Pannonian basin. Global and Planetary Change 58, 165–180.  Dimitrijević, M.D., 1997. Geology of Yugoslavia, ...

  • Understanding partitioning of deformation in highly arcuate orogenic systems: Inferences from the evolution of the Serbian Carpathians

    Nemanja Krstekanić, Liviu Matenco, Marinko Toljić, Oleg Mandić, Uroš Stojadinović, Ernst Willingshofer (2020)
    orogeneza, oroklini, višesmerna ekstenzija, transkurentna kretanja, Srpski Karpati
    ... magmatic evolution illuminating crustal and mantle dynamics of the eastern Mediterranean region since the late Cretaceous. Tectonophysics 675, 103–140. Menant, A., Sternai, P., Jolivet, L., Guillou-Frottier, L., Gerya, T., 2016b. 3D numerical modeling of mantle flow, crustal dynamics and magma genesis ...
    ... More recent regional paleostress reconstructions indicate a stress field with variable orientations that formed during the gradual clockwise rotation around the Moesian Platform (Mladenović et al., 2019). However, how such a variable stress field is linked with the mechanics of regional and local ...
    ... to imposed boundary conditions (e.g., Tikoff and Wojtal, 1999). Given the two approaches (strain and stress), we specifically use in interpretation a terminology that differentiates between stress calculations (compression-tension) and strain observa- tions (contraction-extension). Data were furthermore ...

  • 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
    ... van Gelder et al., 2015; van Unen et al., 2019a, 2019b). The observed strain partitioning is not suitable for deriving paleo- stress directions by kinematic data stress inversion. Paleostress inversion methods require that fault-slip measurements are taken along faults that do not have large offsets ...
    ... the observed kinematic patterns. 1. Introduction The indentation of continental fragments is commonly used to explain orogenic shortening and crustal/lithospheric thickening accompanied by lateral extrusion, which is often associated with opposite polarity subduction systems (Davy and Cobbold, ...
    ... collision zone between Eastern Alps and western Turkey. Gondwana Res. 78, 308–374. Searle, M.P., Elliot, J.R., Phillips, R.J., Chung, S.-L., 2011. Crustal–lithospheric structure and continental extrusion of Tibet. J. Geol. Soc. 168, 633–672. Seghedi, A., Berza, T., Iancu, V., Mărunţiu, M., Oaie, ...

  • Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention

    Milica Ješić, Bojan Martinović, Stefan Stančić, Miroslav Crnogorac, Dušan Danilović (2023)
    Gas wells, particularly those situated onshore, play a vital role in the global energy sector by supplying a significant portion of natural gas. However, operational challenges, notably gas hydrate formation, pose substantial issues, leading to complications such as flowline blockages and unexpected well shutdowns. Gas hydrates, crystalline structures resembling ice, ...
    Gas Well, Gas Hydrate Formation, Well Modeling, Well Performance Optimization, Choke Position Adjustments, Methanol Injection

  • Hydraulic impact of pressure transients from water conveyance tunnel on the complex hydrogeological system: A case study HPP

    Igor Jemcov, Maja Todorović, Aleksandar Jemcov, Marina Ćuk Đurović (2024)
    Tunel pod pritiskom, Unutrašnji pijezometri, Tranzijenti pritiska, Karstna izdan, Pukotinska izdan, Hidraulički odziv
    ... prevent permeability. Long-term operation of HPP can cause cracks in the tunnel lining in circumstances of high internal pressure when the tangential stress at the inner surface exceeds the tensile strength of concrete (Schleiss, 1986). The appearance of cracks is particularly emphasized in highly fractured ...

  • 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
    ... chaos of rays in problems of wave propagation in inhomogeneous media, Soviet Physics Uspekhi 34, 645-664. 3. Adams, J., Bell, J.S. 1991. Crustal stress in Canada. In: Slemmons, D.B., Engdahl, E.R., Zoback, M.D., Blackwell, D.D. (eds.) Neotectonics of North America, Geological Society of America ...
    ... 24411-24426. 64. Гр а , . . 1959. е р е е ере а ра е , а y А а е а 128, 880–881. 65. Grunthal, G., Stromeyer, D. 1992. The recent crustal stress field in europe: Trajectories and finite element modeling. Journal of Geophysical Research 97, 11,805-11,820. 66. Haegeman, B., Engelborghs ...
    ... 1959. O romeomopdu3me cuctem juddepeHuMasbHbx ypaBHennit , JJoxnany Akagemun Hayk CCCP 128, 880-881. Grunthal, G., Stromeyer, D. 1992. The recent crustal stress field in europe: Trajectories and finite element modeling. Journal of Geophysical Research 97, 11,805-11,820. Haegeman, B., Engelborghs, K., Roose ...

  • Geostatički proračuni sanacije klizišta šipovima

    Slobodan Ćorić, Dragoslav Rakić, Dušan Berisavljević (2019)
    U ovom radu su, polazeći od rezultata geotehničkih istraživanja, prikazani geostatički proračuni sanacije klizišta vertikalnim šipovima. Metodologija proračuna je složena, jer podrazumeva interakciju klizišta i stabilizirajućih šipova. Stoga se simultano analiziraju stabilnost klizišta i stabilnost šipova. Prilikom određivanja bočne otpornosti tla oko šipova koristi se metoda Brinč Hansena koja uzima u obzir trodimenzionalne uslove u tlu i može da se primeni u složenim geološkim uslovima koji su česti u Srbiji. Analize stabilnosti klizišta vrše se odgovarajućim metodama granične ravnoteže. ...
    sanacija klizišta, interakcija klizišta i šipa, bočna otpornost šipova, stabilnost klizišta i šipova
    ... 2. Koeficijent bočnog pritiska tla koji zavisi od vertikalnog, napona Figure 2. Coefficient of lateral pressure which is dependent of verftical stress (Brinch-Hansen, 1961) Brinč Hansenova metoda može da se primeni i u homogenim i u heterogenim terenskim uslovima i to kako za drenirane tako i ...

  • Joint interpretation of paleomagnetic, structural and AMS results from the Vardar Zone of Serbia

    Emo Marton, Marinko Toljić, Vesna Lesić, Vesna Cvetkov (2021)

  • Extensive vibrations of the belt conveyer drive electromotor of a bucket wheel excavator as a result of intesified wear-and-tear of its mount support

    Vesna Damnjanović, Predrag Jovančić, Snežana Aleksandrović (2017)

  • Geotehnički uslovi izgradnje nadvožnjaka "Balajnac" na autoputu E-80 deonica: Niš - Merošina

    Dragoslav Rakić, Nikola Božović (2024)
    U sklopu prve deonice autoputa E-80 Niš – Merošina, izgrađen je nadvožnjak u zoni sela Balajnac koji je oslonjen na tri stubna mesta na međusobnom rastojanju od oko 26 m. Svaki stub je fundiran na šipovima i to sa predloženim rasporedom od 2 šipa u grupi na međusobnom rastojanju od 3.6 m. U radu su na osnovu izvršenih geotehničkih istraživanja terena, analizirani rezultati nosivosti vertikalno opterećenog šipa prečnika 1.2 m i dužine šipa od L = 23 m. Analiza ...
    nadvožnjak Balajnac, šip, probno opterećenje šipa, projektni pristup, granična stanja

  • 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
    ... chaos of rays in problems of wave propagation in inhomogeneous media, Soviet Physics Uspekhi 34, 645-664. 3. Adams, J., Bell, J.S. 1991. Crustal stress in Canada. In: Slemmons, D.B., Engdahl, E.R., Zoback, M.D., Blackwell, D.D. (eds.) Neotectonics of North America, Geological Society of America ...
    ... 24411-24426. 64. Гр а , . . 1959. е р е е ере а ра е , а y А а е а 128, 880–881. 65. Grunthal, G., Stromeyer, D. 1992. The recent crustal stress field in europe: Trajectories and finite element modeling. Journal of Geophysical Research 97, 11,805-11,820. 66. Haegeman, B., Engelborghs ...
    ... 1959. O romeomopdu3me cuctem juddepeHuMasbHbx ypaBHennit , JJoxnany Akagemun Hayk CCCP 128, 880-881. Grunthal, G., Stromeyer, D. 1992. The recent crustal stress field in europe: Trajectories and finite element modeling. Journal of Geophysical Research 97, 11,805-11,820. Haegeman, B., Engelborghs, K., Roose ...

  • Late and post-collisional tectonic evolution of the Adria-Europe suture in the Vardar Zone

    Emő Márton, Marinko Toljić, Vesna Cvetkov (2022)
    The Vardar Zone is a product of the Triassic-Jurassic opening of the Neotethys, Jurassic obduction, Late Cretaceous/Paleogene consumption of the oceanic crust and continental collision. During the last process, the Eastern Vardar Zone was thrust over the Central and eventually both onto the Western Vardar Zone. The present paleomagnetic and structural study provided new results from the first two zones in the Belgrade area. The younger set of data, together with published ones from the third zone, provide firm ...
    Adria–Europe suture, Vardar Zone, Paleomagnetism, Thrusting, Vertical axis rotation

  • Trans-Lithospheric Diapirism as a Possible Mechanism for Ophiolite Emplacement?

    Nikola Stanković, Taras Gerya, Vladica Cvetković, Vesna Cvetkov (2024)

  • Poređenje rezultata interferometrijske analize za zemljotrese na istočnom anatolijskom rasedu od 2020. i 2023. godine

    Dragan Živković (2024)
    Ovaj rad se bavi analizom površinskih deformacija izazvanih zemljotresima u Turskoj iz 2020. i 2023. godine korišćenjem diferencijalne satelitske radarske interferometrije (DInSAR tehnike). Cilj istraživanja bio je da se kvantifikuju i uporede deformacije terena izazvane ovim seizmičkim događajima i da se razumeju mehanizmi koji stoje iza oslobađanja seizmičke energije u regionu. Analizom DInSAR snimaka, identifikovane su različite deformacije duž rasednih zona za svaki zemljotres. Dok je zemljotres iz 2020. godine (M 6,7) izazvao lokalizovane deformacije duž Istočno anatolijskog raseda, zemljotres ...
    DInSAR, Istočno anatolijski rased, Kahramanmaraški trostruki spoj