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Упит dcterms_subject_txt:hard rock

327 items

  • 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
    ... Approach. Proceedings of the 2nd International Symposium on the Geotechnics of Hard Soils / Soft Rocks. Vol. 1, Naples, Italy 10. Vlastelica, G., Miščević, P., Pavić, N., (2016) Testing the shear strength of soft rock at different stages of laboratory simulated weathering. Građevinar, Vol. 68 No ...
    ... 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 ...

  • 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 ...
    ... preposition amid something or surround- ed by something; synonyms: amid, amidst astonishing adjective used to describe something amazing or hard to believe; synonyms: amazing, jolting, jaw-dropping; antonyms: mundane, ordinary, usual astonishingly adverb in a rather surprising manner; ...
    ... 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 ...

  • 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 ...
    ... about 27 times for Th) in grossular-rich zone (core). The maximum value of U and Th is 3 ppm (Table 1). Discussion Analysing mineral zonation is a hard and challenging task due to the dimensions of the analysis pit to the relative scale of zonation and the angle of zonation margin to the imaged ...

  • 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
    ... the main way of hard raw materials exploitation in mining industry. Very favorable techno-economic indicators are achieved by blasting, which are followed by negative effects of blasting unfortunately. In order to protect the environment, it is necessary to determine the rock mass oscillation ...
    ... represents the main way of hard raw materials exploitation in mining industry. Very favorable techno-economic indicators are achieved by blasting, which are followed by negative effects of blasting unfortunately. In order to protect the environment, it is necessary to determine the rock mass oscillation equation ...
    ... 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 at terrain are felt as shock. Based on application of ...

  • 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

  • GIS Application Improvement with Multilingual Lexical and Terminological Resources

    Ranka Stanković, Ivan Obradović, Olivera Kitanović (2010)
    ... performed with the compound keyword kvarcna stena ‘quartzose, quartz rock’, three inflectional transducers are used: one for the inflection of the adjective kvarcni ‘quartz’, one for the inflection of the noun stena ‘rock’ and one for the compound as a whole, which takes care of agreement ...
    ... ove stene obrazovani su direktnom eksplozivnom fragmentacijom, Synonym= Piroklastit, Hyperonym= 2123} {ID=12345, Name=Pyroclastic rock, Def=A volcanoclastic rock formed by direct explosive volcanic activity, OrigID=2356, Lng=EN) {ID=12367, Name= Roches pyroclastiques, Def= Une pierre volc ...
    ... in the morphological e-dictionary of compounds. For example, in order to determine the third inflectional transducer for kvarcna stena ‘quartz rock’, the following rule of the abovementioned procedure, imbedded in the query expansion application WS4QE, was used: if the first word is an adjective ...

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

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

  • Definition of groundwater genesis and circulation conditions of the complex hydrogeological karst system Mlava–Belosavac–Belosavac-2 (eastern Serbia)

    Ljiljana Vasić, Saša Milanović, Zoran Stevanović, Laszlo Palcsu (2020)
    Geochemistry and Petrology

  • Mesozoic carbonate rocks in Serbia used as dimension stone

    Vesna Matović, Tijana Vojnović Ćalić (2016)
    The building industry in Serbia uses, to a great extent, imported natural stone for architectural purposes. The significance of local deposits, particularly limestones, is not adequately perceived despite the country’s abundance of these valuable resources. Therefore, this study focuses on Serbia’s Mesozoic carbonate rocks, specifically on the deposits of four selected quarries: Klisura, Skrzut, Struganik, and Tisnica. The quality and prospects of the application of these limestones has not yet been the subject of a detailed, comprehensive investigation. Therefore, ...
    Ukrasni kamen, Mezozoik, Krečnjak, Srbija, Petrografija, Fizičko-mehanička svojstva
    ... ples, may be due to the heterogeneity of the rock mass, 1.e., tested samples. All observed limestones are resistant to frost with the mass loss being less than 2 % after 25 freeze-thaw cycles. All investigated limestones are predominantly hard rocks (Bilbija and Matović 2009). They have equable ...
    ... a NW-SE direction, with variable thickness of 6.95-34.0 m (Lazarević 1994). The rock mass is built of Upper Cretaceous limestone, which belongs to the Cenomanian age (Dimitrijević 1996). Tectonically, the rock mass is fragmented into blocks by a system of faults and fractures that reduce the ...
    ... Cladding of exterior vertical surfaces of architectural objects up to IO m high along with fractured rock mass, limit the size of commer- cial blocks and reduce the usable percentage of the rock mass. Nodular texture, lamination, stromatolites, fenestra- tions, and stylolites appear as internal ...

  • Preliminary regional landslide susceptibility assessment using limited data

    Igor Peshevski, Milorad Jovanovski, Biljana Abolmasov, Jovan Papic, Uroš Đurić, Miloš Marjanović, Ubydul Haque, Natasha Nedelkovska (2019)
    In this paper a heuristic approach for preliminary regional landslide susceptibility assessment using limited amount of data is presented. It is called arbitrary polynomial method and takes into account 5 landslide conditioning parameters: lithology, slope inclination, average annual rainfall, land use and maximum expected seismic intensity. According to the method, in the first stage, a gradation is performed for each of the carefully selected conditioning parameters by assigning so called rating points to the grid cells on which the ...
    klizišta, podložnost
    ... occurrences have been defined as intermediate and deep, and those mostly occurred in debris material overlying hard rock masses or in fluvioglacial and proluvial sediments. The depth of some of these landslides varies in the range from 5->25–30 me- tres. The remaining 40% of slides are shallow and ...
    ... n (mostly rock falls and rockslides), the highest rating of 3 is assigned. This type of inter- polation was used for the analyzed case study region. In more detailed statistical models, the slope inclination is treated sepa- rately according to the slope movement types (landslides, rock- falls, debris ...
    ... belongs to a larger re- gional tectonic unit called the Western Macedonian Zone (WMZ). In this unit rock masses from the Palaeozoic, Mesozoic, Pliocene and Quaternary periods are represented. Igneous rock masses include granodiorites, granites, diorites, rhyolites, ser- pentinites, gabbros, diabases etc ...

  • Geochemical study of U, Th and REE mineralizations in Jurassic sediments and hydrochemical characterization of groundwaters in Eastern Serbia – Case study: Plavna area

    Jovan Kovačević, Maja Todorović, Marina Ćuk, Petar Papić (2016)
    jurski sedimenti, uran, torijum, elementi retkih zemalja, podzemna voda, istočna Srbija