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Упит dcterms_subject_txt:piroliza Rock-Eval

343 items

  • 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
    ... Empirical estimation of rock mass modulus. International Journal of Rock Mechanics and Mining Sciences, 43, 203-215 ttps://doi:10.1016/j.ijrmms.2005.06.005 3 Hoek, E., Carter, T.G., Diederichs, M.S. (2013) Quantification of the Geological Strength Index Chart 47th US Rock Mechanics / Geomechanics ...
    ... town is located. Geotechnical model of the limestone rock mass and joint network model are formed by utilization of drone photogrammetry. The tensile force (approx. 30 MN) induced on the bridge pillar should be accepted and transfered to the rock mass by the system of prestressed anchors. Two investigation ...
    ... Successful anchor load test and numerical analysis showed that the rock mass is capable of sustaining tensile Jorce induced by the bridge structure. Displacements of the bridge abutment are approx. several mm for an assumption of isotropic rock mass behaviour. If Joints are applied explicitly the displacements ...

  • Model for estimation of stress field in the earth's crust

    Slavko Torbica, Veljko Lapčević (2016)
    field stress, rock mass, underground excavation

  • Modern self-propelled surface drill rigs for drilling small diameter holes in mining and construction operations

    Milanka Negovanović, Lazar Kričak (2021)
    Приликом одређених рударских или грађевинских радова потребно је извршити минирање применом бушотина малог пречника. Раније, бушење бушотина малих пречника се изводило углавном ручним бушилицама или лаким лафетним бушилицама нa одређеним нoсачима. Проблеми у овим случајевима били су капацитет бушења, бушење већих дужина бушотина и посебно безбедност оператера на неприступачним теренима, где је његово присуство било неопходно. Данас постоје модерне самоходне бушилице за бушење минских бушотина малог пречника, које су у потпуности даљински управљане. Радио даљинска контрола омогућава да се ...
    Бушилице,бушотине малог пречника, бушење, минирање,изградња,минирање негабарита, радио даљинска контрола

  • Analiza seizmičkog dejstva eksplozije pri miniranju na primeru izrade tunela Golubac kod Golupca

    Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Luka Crnogorac (2022)
    Savremeno rudarstvo, a pogotovo masovna eksploatacija metaličnih ležišta, ne bi se mogla zamisliti bez primene eksploziva. Rudarstvo je privredna grana, gde su eksplozivi našli najširu primenu za eksploataciju čvrstih mineralnih sirovina. Primena energije eksploziva dovodi do poboljšanja tehničkoekonomskih pokazatelja pri eksploataciji mineralnih sirovina, ali i do pojave negativnih efekata koji prate radove na miniranju. Eksplozivni materijali u rudarstvu, geologiji i drugim delatnostima, svojim dejstvom narušavaju prirodnu sredinu u vidu drobljenja, razbacivanja komada stene, vazdušnih udara, pojave sezmičkih efekata, pojave ...
    miniranje, seizmičko dejstvo, brzina oscilovanja stenske mase, kriterijumi ocene seizmičkog dejstva

  • Load test of Large Diameter Piles for the Bridge Across Danube River in Belgrade

    Rakić Dragoslav, Šušić Nenad, Basarić Irena, Đoković Ksenija, Berisavljević Dušan (2014)

  • 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
    ... induced by the rock stress surrounding the gate road. Deformation dynamics is the study of time varying response of support under dy- namic loads. These loads are primarily considered a change of rock stress intensity induced by mining activities. As a stope approaches the gate road, the rock stress intensity ...
    ... and an adaptive neuro-fuzzy inference system, in order to estimate the uniaxial compressive strength of rock. Grey system prediction models were developed by Xiaobo Xiong [3] for forecasting rock tunnel displacement considering the non-linear parameters of the deformation of the tunnel. Ping Tang [4] ...
    ... predict the long-term potential deformation trends of surrounding rocks in a soft rock roadway tunnel. Haiming Chen et al. [6] built an intelligent displacement back analysis network of a deep mine roadway surrounding rock that is based on MATLAB NN toolbox. Francesca Bozzano et al. [7] used terrestrial ...

  • The Rift Sequence Stratigraphy of the Itebej Field (Pannonian Basin, Serbia)

    Saša Ivanišević, Jelena Radišić, Ivana Isić, Dejan Radivojević (2019)
    ... were deposit during the Pannonian sensu lato. The hemipelagic marls deposited in the Srpska Crnja Depression are the main source rock for Itebej field, while the source rock potential of the Badenian sediments is significantly lower. The reservoir rocks of the Itebej structure are syn-rift reef complex ...
    ... reservoir rocks have high-quality petrophysical properties with commercial quantities of heavy to heavy medium paraffin-base crude oil. The seal rock are deep-water syn-rift pelagic sediments and hemipelagic post-rift marls of the Lake Pannon. Keywords: Central Paratethys, Itebej field, rift sequence ...

  • Uticaj raspadanja na stabilnost kosina u mekoj stenskoj masi

    Anđela Despotov (2024)
    U radu je opisano ponašanje mekih stenskih masa koje su izložene porecesu raspadanja tokom određenog vremenskog perioda. Meke stenske predstavljaju kritične vrste stenskih masa pošto izazivaju različite probleme tokom izvođenja građevinskih radova. Meke stene mogu biti sedimentne stene, raspadnute metamorfne i magmatske stene. Odlikuju se niskim vrednostima čvrstoće, visokom deformabilnošću, visokom plastičnošću, podložne su dezintegraciji i fizičko-hemijskom raspadanju, odnosno ubrzanom dejstvu površinskog raspadanja usled atmosferskih uticaja.Za klasifikaciju mekih stenskih masa koriste se modifikovane verzije već postojećih klasifikacionih sistema. Jedan ...
    meke stenske mase, dezintegracija, klasifikacioni sistemi, Slake durability test
    ... slake-durability test. Rock Mechanics Ltd. Bracknell, Berks. UK 15. Gautam, P., Shakoor, A., (2013), Slaking behavior of clay-bearing rocks during a one-year exposure to natural climatic conditions, Eng Geol., 166, pp. 1725 16. Hoek, E., (1994) Strength of Rock and Rock Masses. ISRM News Journal ...
    ... Journal, 2, 4-16 17. Hoek, E., Brown, E.T., (1997) Practical Estimates of Rock Mass Strength, International Journal Rock Mechanics Mining Science, 34, 1165-1186. 18. Hoek E., Brown E.T., (1980) Underground Excavations in Rock. London: Institution of Mining and Metallurgy 527 p, London 19. ISO ...
    ... Identification, description and classification of rock 20. Sandeen, J., (2023), Mechanical Weathirng, CK-12 Foundation 21. Kanji, M., (2014), Journal of Rock Mechanics and Geotechnical Engineering 22. Kanji, M., He, M., Sousa, L.R., (2019) Soft Rock Mechanics and Engineering. Switzerland: Springer ...

  • From volcanology to petrogenesis: an example from Cenozoic volcanic rocks of Serbia

    Vladica Cvetković, Kristina Šarić (2023)
    vulkanska stena, piroklastični depozit, dacit, andezit, kvarclatit, lamproit, magma miksing, explozivna aktivnost

  • Geotechnical conditions of “Debelo brdo” tunnel construction on the highway E-80: Nis-Merdare-Pristina (“Peace Highway”)

    Dragoslav Rakić, Irena Basarić Ikodinović, Radojica Lapčević, Dragan Lukić (2024)
    The construction of the highway E-80 has begun in Serbia, which will represent the traffic hub of the Western Balkans and will be part of the main regional transport network of Southeast Europe. Its total length through Serbia is 77 km, and one part of the route is designed through a typical plain terrain, while a larger part of the route passes through hilly terrain. The construction of the tunnel “Debelo brdo” is planned partly in an open cut ...
    „Debelo brdo“ tunnel, temporary slopes, open cut excavation, tunnel excavation, piles

  • Hydrogeochemical distribution of Ca and Mg in groundwater in Serbia

    Petar Papić, Jovana Milosavljević, Marina Ćuk, Rastko Petrović (2014)

  • Atmospheric exposure vs burying: influences on damage intensity of built-in kersantite in the monument of the Small Staircase (Belgrade, Serbia)

    Nevenka Novaković, Predrag Dabić, Vesna Matović (2023)
    Proučavan je efekat „zatrpanog kamena“ na intenzitet procesa degradacije prisutnih na kersantitu koji je ugrađen u spomenik Malo stepenište. Istraživanja su vršena na uzorcima stene iz kamenoloma i na oštećenim kamenim blokovima ugrađenim u spomenik. Dok su neki delovi stepeništa bili pod zemljom 90 godina, većina kamenih elemenata je bila izložena različitim uslovima sredine i antropogenim uticajima. Urađeno je detaljno mapiranje trenutnog stanja spomenika kako bi se istražio uticaj “zatrpavanja” i kompleksne geometrije spomenika na tip propadanja i variranje ...
    Raspadanje, Indeks oštećenja, Zatrpavanje, Fizička svojstva, Kersantit

  • Hydrochemical changes and groundwater grouping data by multivariate statistical methods within one karst system: recharge–discharge zone (Eastern Serbia case study)

    Ljiljana Vasić, Dragana Živojinović, Vladana Rajaković-Ognjanović (2020)
    Geochemistry and Petrology

  • English for Geology Students. 2

    Lidija Beko (2023)
    Engleski jezik
    ... the intrusion of molten granite batholiths into surrounding rock, both through heat and by forcing very hot liquids with high mineral contents into the rock. The crystallisation that occurs with cooling results in cracks in the rock being filled with mineral veins or – when the veins are grouped ...
    ... use this opportunity to extend a big and heartfelt “thank you” to him. Wulfenite > 10 . Part3 NMetals and gemstones All three of the basic rock types – igneous, sed- imentary and metamorphic – can be host to mineral ore deposits: accumulations of minerals with a sufficiently high concentration ...
    ... this form of carbon is carried to the surface via kimberlite pipes – naturally occurring funnel-shaped formations of kimberlite, an ultramafic rock,in which diamond crystals are widely disseminated. 83 Vocabulary abrade verb [transitive] the act ofrubbing against the surface of something ...

  • Оцјена водопропусности понорске зоне Шуковићу (Цернићко поље) помоћу Лижоновог теста

    Петар Војновић, Саша Милановић, Љиљана Васић (2022)
    One of the specificities of reservoirs forming in highly karstified terrains is reflected in the wide range of unknowns, specifically during reservoir formation, filling and operation. Unfortunately, despite complex research, many reservoirs constructed in karst terrains have problems with water losses from the reservoir to other aquifers due to ponor and ponor zones which are a common in the karst of Eastern Herzegovina. One of such zones is Šuković ponor located in the southern part of the Cerničko polje ...
    карст, Шуковића понор, Церничко поље, водопропусност, Лижонов тест

  • Geotechnical zoning of the terrain along the first section of E-80 highway in Serbia – SEETO route 7

    Dragoslav Rakić, Zoran Berisavljević, Irena Basarić, Snežana Bogdanović, Jovana Janković (2019)
    Part of E-80 highway that passes through Serbia (from the city of Nis to the administrative border Merdare) is 77 km long. The highway is divided into two sections: the first from Nis to Plocnik (39.4 km long) and the second from Plocnik to the administrative border with Kosovo. The route is designed through a typical plain and hilly terrain in which different geological units are dominant: crystalline schists, neogene sediments of foothills and quaternary sediments in the valley ...
    ... terrains that are stable in natural conditions. Maximal groundwater level is at a depth greater than 2 m in these terrains. In solid rock masses is not expected rock fall or B.4 - Structures and infrastructure ECSMGE-2019 – Proceedings 6 IGS erosion as well as shallow sliding on unsecured ...
    ... composition was analysed. Occurrences of rock falls and torrential activities of streams are possible. Within this section, three zones were defined (Figure 10). Due to the construction of larger number of bridges, and because this section is built of solid rock masses, most of the section is c ...
    ... and 2017: 121 exploration boreholes, 23 Cone Penetration Tests, 105 Standard Penetration Tests, 2 dilatometer tests, 277 samples of soil and rock were tested, 11 piezometer constructions were built in, geophysical investigations (68 geoelectrical sounds, 18 refraction profiles), mineralogical- ...

  • Anisotropic grossular–andradite garnets: Evidence of two stage skarn evolution from Rudnik, Central Serbia

    Bojan Kostić, Danica Srećković-Batoćanin, Petyo Filipov, Pavle Tančić, Kristijan Sokol (2021)
    This paper presents LA-ICP-MS data for garnets from the Rudnik skarn deposit (Serbia), which range from Grs45–58Adr40–52Alm2–3 in the core and Adr70–97Grs2–29Sps1 in the rim displaying anisotropy and zoning. In spite of wide compositional variations the garnets near the end-member of andradite (Adr > 90) are generally isotropic. Fe-rich rims exhibit LREE depletion and flat HREE pattern with weak negative Eu anomaly, including higher As and W contents. On the other side, the Fe-poorer core shows flat REE pattern ...
    grandite, garnets, skarn, Rudnik
    ... et al. (2008) Al-rich garnets, which are anisotropic and twinned, form by prolonged interaction of pore fluids with the host rock, leading to a system buffered by the rock composition. They are commonly LREE depleted and HREE enriched, displaying weak positive or negative Eu anomalies. On the contrary ...
    ... Further, Fe-rich garnets grow rapidly by advective metaso- matism, at higher water/rock ratios (W/R), from magmatic- derived fluids, while Al-rich garnets are formed by diffusive metasomatism, at low W/R ratio, from host rock buffered metasomatic fluids (Gaspar et al. 2008). Significant presence of W ...
    ... of their two-stage evolution. The first stage and period of garnet growth is probably buffered by mineral dissolution and reactions in the country rock. The second stage is related to hydrothermal activity when W and Fe were brought into the system probably by a boiling process in the volcanic ...

  • Анализа одрона у стенским косинама: савремени приступи

    Милош Марјановић (2023)
    У Србији и региону познате су бројне појаве одрона које су изазвале велике застоје саобраћаја, материјалне штете или чак имале фаталне исходе, па их је потребно непрестано пратити и изучавати. Mодeловањe одрона скопчано је са ниским нивоом поузданости, али савремене технологије омогућавају да сe такви изгледи донекле побољшају. Једна од технологија која чини искорак утом правцу јe LiDAR-ско скенирање, које обезбеђује детаљне топографске подлоге у виду облака тачака високе резолуције и тачности. Поступак анализе одрона може се свести на: ...
    одрони, осматрање, LiDAR, облак тачака, моделовање

  • Primena programa UVSZ pri zaštiti od miniranja

    Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Luka Crnogorac, Rade Tokalić (2021)
    Primena energije eksploziva tj. miniranje, predstavlja osnovni način eksploatacije čvrstih mineralnih sirovina u rudarstvu. Miniranjem se postižu vrlo povoljni tehnoekonomski pokazatelji, koje nažalost prate i negativni efekti miniranja. U cilju zaštite životne sredine potrebno je za svaku radnu sredinu odrediti jednačinu oscilovanja stenske mase pri miniranju. Ova jednačina definiše promenu brzine oscilovanja stenske mase u zavisnosti od rastojanja, količine eksploziva, uslova izvođenja miniranja i geoloških karakteristika stenske
    Program UVSZ, miniranje, potres, zaštita životne sredine
    ... determine the rock mass oscillation equation for each working environment during blasting. This equation defines the change of rock mass oscillation velocity depending on distance, explosive amount, conditions of blasting and geological characteristics of rock mass. Oscillations of the particles of rock mass ...
    ... necessary to determine the rock mass oscillation equation for each working environment during blasting. This equation defines the change of rock mass oscillation velocity depending on distance, explosive amount, conditions of blasting and geological characteristics of rock mass. Oscillations of the ...
    ... the particles of rock mass at terrain are felt as shock. Based on application of this equation, we are able to predict the oscillation velocity for each subsequent blasting in a given working environment. On that way, shocks from blasting, in a seismic sense, are brought under control. In this ...

  • The subthermal potential of karstic groundwater of Kučaj–Beljanica region in Serbia estimated by the multivariate analysis

    Ljiljana Vasić, Dragana Ž. Živojinovic, Vladana Rajaković-Ognjanović, Huang Fen, Cao Jianhua (2021)
    Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change