Претрага

Упит dcterms_subject_txt:Tunneling in hard rock

1981 items

  • Testing the energy value of different types of coal by the method of active thermography

    Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković (2020)
    In this paper, coal thermograms are presented and analyzed in order to determine their energy value. Two types of coal of different categories, brown and lignite, were selected for active thermographic imaging. The tested coal samples were processed before measurement so that they are similar in dimensions and have two plane-parallel smooth surfaces. The test samples were "primarily" heated under the same conditions and the process of their cooling was monitored by a thermal camera. "Then" they were cooled ...
    Infrared imaging, nondestructive testing, active thermography, coal.

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

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

  • The Newton method for solving nonlinear equations based on aggregation operators

    Nebojša M. Ralević, Dejan Ćebić (2019)

  • Concepts for Improving Machine Learning Based Landslide Assessment

    Miloš Marjanović, Mileva Samardžić Petrović, Biljana Abolmasov, Uroš Đurić (2019)
    Katastar klizišta, Podložnost, Hazard, Mašinsko učenje, Uzorkovanje, Validacija

  • Towards Better Valorisation of Industrial Minerals andRocks in Serbia—Case Study of Industrial Clays

    Vladimir Simić, Dragana Životić, Zoran Miladinović (2021)
    Management, Monitoring, Policy and Law,Nature and Landscape Conservation
    ... tions and specifics. In all the above classifications, the basis for the categorisation of re- serves is the maximum distances between exploration works and the maximum length of sampling interval. Tables 4 and 5 show the recommended distances from the basic classi- fication of clay rock reserves of the ...
    ... deposits (Table 4) represent for that time, but still today, the most rational basic concept for exploration of clay rock deposits, regardless of the area of application. 2. In the Serbian Rulebook [52] on the exploration of kaolin deposits (Table 5), the dis- tances for groups 1 and 2 for categories ...
    ... mandatory and must not in any way limit the initiative of ge- ologists in choosing the most rational exploration network.” The excellent example of kaolinite clay exploration procedure in the United States is shown in Table 7. The exploration level of those deposits is very high, although in the USA a CRIRSCO ...

  • Clockwise vertical-axis rotation in the West Vardar zone of Serbia: Tectonic implications

    Vesna Lesić, Emo Márton, Violeta Gajić, Dragana Jovanović, Vesna Cvetkov (2018)
    The Vardar-Tethyan mega-suture between the Eurasian and Adria (Gondwana) margins comprises remnants of oceanic lithosphere of Neotethys and distal parts of the adjacent continental margins including unconformable Late Cretaceous sedimentary cover and Cenozoic igneous rocks of post-obduction age. This study provides kinematic constraints for displacements and rotations affecting the Serbian part of the West Vardar and Jadar-Kopaonik units after the closure of the Neotethyan (= Sava) Ocean. The targets of the paleomagnetic research were Late Cretaceous sediments representing an ...
    Paleomagnetism, Clockwise rotation, Dinarides, West Vardar zone
    ... evidence for post-collisional Miocene clockwise rotation in the Serbian segment of the Vardar Zone and the Danubicum. 26th IUGG General Assembly, Prague, Abstracts, IUGG-1324. Lowrie, W. (1990). Identification of feromagnetic minerals in a rock by coercitive and unblocking temperature properties. Geophys- ...
    ... two types of limestones containing cherts. One is an autochthonous micritic limestone (Folk 1959, 1962) which is the indigenous rock (whitish, greyish colour) deposited in a pelagic environment. It contains an Upper Campanian-Lower Maastrichtian globotruncanid associa- tion (Gajić 2007, 2014). The ...
    ... & Jelı́nek, V. (2008). Anisoft 4.2.—Anisotropy data browser. Contributions to Geophysics and Geodesy, 38, 41. Collinson, D. W. (1983). Methods in rock magnetism and palaeo- magnetism, techniques and istrumentation (p. 503). London: Chapman and Hall. Cvetkov, V., Lesić, V., & Vasković, N. (2012) ...

  • Long-term planning methodology for improving wood biomass utilization

    Vladimir Vukašinović, Dušan Gordić, Marija Živković, Davor Koncalović, Dubravka Živković (2019)
    The insufficiently developed forest management system is often followed by undeveloped forest resources supply chain and insufficient institutional support. These cause inefficient usage of fuel-wood as well as huge amounts of unused forest residues. In order to achieve optimal and long-term sustainable utilisation of biomass, an original methodology based on the interaction of mathematical optimization and backcasting approach has been developed. Mathematical optimization is used for both generation and consideration of techno-economic parameters of the forest biomass supply chain. ...
    Long-term planning methodology, Forest biomass, MINLP, Backcasting

  • Flood protection and water utilization of karst poljes: example of Gatačko Polje, Eastern Herzegovina

    Tina Dašić, Ljiljana Vasić (2020)
    Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry,Global and Planetary Change

  • Srbija u OneGeology Europe

    Danka Blagojević, Ranka Stanković, Petar Stejić, Velizar Nikolić (2014)
    Геолошки завод Србије као носилац Пројекта ОneGeologyEurope заједно са Рударско геолошким факултетом и Министарством за природне ресурсе, рударство и просторно планирање су се укључили у међународни Пројекат OneGeology Europe у мају 2013. године у већ поодмаклој фази израде Пројекта. До краја 2013. године испунили су завршене активности које треба да доведу до пуноправног укључења у Пројекат чиме је Република Србија нашла своје место на Геолошкој карти Европе 1:1М. Геолошка карта Србије 1:1М представља компилациону односно поједностављену верзију ОГК 1:500 ...
    OneGeologyEurope, метаподаци, хармонизација података, вишејезични мета-информациони систем
    ... former Yugoslavia, enabled today's Geological Survey of Serbia involvement in the Project OneGeology-Europe With the assistance of competent Ministry and Faculty for mining and geology, Serbia in the last moment step in the new European trend of exchanging data on the basis of uniform criteria for ...
    ... the former Yugoslavia, enabled today's Geological Survey of Serbia involvement in the Project OneGeology-Europe With the assistance of competent Ministry and Faculty for mining and geology, Serbia in the last moment step in the new European trend of exchanging data on the basis of uniform criteria for ...
    ... flows Vodeni tokovi Quatemary 0 Eartsurface deposits River plain system 4 Quarternary Holocene in general Holocen uopate 2 Quartemary Pleistocene in general Pleistocen uopste ee 3 Quarternary _Quarternary in general Kvartar uopate Quatemary | 4 Terrestrial deposits Se Cae 1241 up. ptht 1.21.34 4 Quartemary ...

  • 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
    ... perturbations, time delay, frictional strength SCIENTIFIC FIELD: Mining Engineering FIELD OF ACADEMIC EXPERTISE: Exploration of hard mineral resources and rock mechanics UDK number: 512.643:519.245/.856/.87:534:64:550.8:616.232 622.1//.261.2/.268.8/.273/.33/.83 624.075/.121.5/.131.55 ...
    ... earthquakes, American Geophysical Union, 5-26 10. Beeler, N.M., Tullis, T.E., Weeks, J.D. 1994. The roles of time and displacement in the evolution effect in rock friction, Geophysical Research Letters 21: 1987- 1990. 11. Behnsen, J., Faulkner, D.R. 2012. The effect of mineralogy and effective ...
    ... early seismic propagation of small and large events in a crustal earthquake model, Journal of Geophysical Research 108, 1-18. 98. Lia, T., Cai, M.F., Cai, M. 2007. A review of mining-induced seismicity in China. International Journal of Rock Mechanics & Mining Sciences 44, 1149– 1171. 99. Li ...

  • 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
    ... perturbations, time delay, frictional strength SCIENTIFIC FIELD: Mining Engineering FIELD OF ACADEMIC EXPERTISE: Exploration of hard mineral resources and rock mechanics UDK number: 512.643:519.245/.856/.87:534:64:550.8:616.232 622.1//.261.2/.268.8/.273/.33/.83 624.075/.121.5/.131.55 ...
    ... earthquakes, American Geophysical Union, 5-26 10. Beeler, N.M., Tullis, T.E., Weeks, J.D. 1994. The roles of time and displacement in the evolution effect in rock friction, Geophysical Research Letters 21: 1987- 1990. 11. Behnsen, J., Faulkner, D.R. 2012. The effect of mineralogy and effective ...
    ... early seismic propagation of small and large events in a crustal earthquake model, Journal of Geophysical Research 108, 1-18. 98. Lia, T., Cai, M.F., Cai, M. 2007. A review of mining-induced seismicity in China. International Journal of Rock Mechanics & Mining Sciences 44, 1149– 1171. 99. Li ...

  • Serbian NER&Beyond: The Archaic and the Modern Intertwinned

    Branislava Šandrih Todorović, Cvetana Krstev, Ranka Stanković, Milica Ikonić Nešić (2021)
    U ovom radu predstavljamo srpski književni korpus koji se razvija pod okriljem COST Akcije „Distant Reading for European Literary History” CA16204. Koristeći ovaj korpus romana napisanih pre više od jednog veka, razvili smo i učinili javno dostupnim Sistem za prepoznavanje imenovanih entiteta (NER) obučen da prepozna 7 različitih tipova imenovanih entiteta, sa konvolucionom neuronskom mrežom (CNN), koja ima F1 rezultat od ≈91% na test skupu podataka. Ovaj model je dalje ocenjen na posebnom skupu podataka za evaluaciju. Završavamo poređenje ...
    ... selected time period were not digitized before, they were not digitized in the proper manner or were not available (Krstev et al., 2019). This preparation procedure involved several steps: selection of novels, retrieval of hard co- pies, scanning, OCR, automatic correction of OCR errors (for which a ...
    ... named SrpCNNER, presented in Section 4. Having the gold dataset, prepared as described in Subsection 4.1, we trained (Subsection 4.2) and evaluated the model in two different set- tings: first, we discussed our model’s perfor- mance on the SrpELTeC-gold test subset, as shown in Subsection 4.3. Afterwards ...
    ... not present in the gold standard, named SrpELTeC-eval, with the findings and a thorough discussion given in Section 5. Finally, conclusions and plans for the future work were stated in Section 6. 2 Related Work The existence of large-scale lexical resources for Serbian, e-dictionaries in particular ...

  • Understanding the effect of synthesis and sintering temperature on the functional properties of barium titanate/cobalt ferrite composites

    Marija Šuljagić, Aleksandar Kremenović, Ivan Petronijević, Adis Džunuzović, Miljana Mirković, Vladimir Pavlović, Ljubica Anđelković (2023)
    To investigate the effect of synthesis procedure and sintering temperature on the functional properties of perovskite/spinel ceramics, BaTiO3/CoFe2O4 composites were prepared by thermal decomposition, coprecipitation, and microemulsion method, and sintered at 1150°C and 1300°C. The phase composition and morphology of as-prepared powders as well as sintered ceramics were thoroughly examined by X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS). The dielectric and ferroelectric measurements were performed in detail. Generally, the ...
    Perovskite/spinel ceramics, Multiferroic, Sintering, Influence of synthesis method

  • A comparative study of the molecular and isotopic composition of biomarkers in immature oil shale (Aleksinac deposit, Serbia) and its liquid pyrolysis products (open and closed systems)

    Gordana Gajica, Aleksandra Šajnović, Ksenija Stojanović, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević (2021)
    The molecular and isotopic composition of biomarkers in initial bitumen isolated from immature (0.41% Rr) oil shale samples (Aleksinac deposit) and liquid products obtained by pyrolysis in open (OS) and closed (CS) systems are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in liquid products is determined. The applicability of pyrolysis type, numerous biomarkers and carbon isotopic compositions (δ13C) of n-alkanes in liquid pyrolysates is established. Pyrolysis experiments were ...
    Uljni šejl, Aleksinac, organska supstanca, otvoreni i zatvoreni sistem pirolize, biomarkeri, izotopski sastav ugljjenika

  • Hydrothermal Synthesized and Alkaline Activated Carbons Prepared from Glucose and Fructose—Detailed Characterization and Testing in Heavy Metals and Methylene Blue Removal

    Sanja Krstić, Milan Kragović, Maja Pagnacco, Vladimir Dodevski, Branka Kaluđerović, Miloš Momčilović, Ivica Ristović, Marija Stojmenović (2018)
    glukoza, fruktoza, аktivni ugalj, hidrotermalni tretman, aktivacija hidroksida, teški metali, metilen plavo
    ... porous carbon by hydrothermal method for use as a catalyst support in methanol electro-oxidation. Catal. Commun. 2008, 10, 267–271. [CrossRef] 37. Isao, M.; Cha-Hun, K.; Yozo, K. Anodic Performance and Insertion Mechanism of Hard Carbons Prepared from Synthetic Isotropic Pitches. Carbon 2001, 39 ...
    ... compounds in comparison with glucose. To confirm differences in crystal structures of the activated samples, Raman spectrometric analyses were performed, and results are presented in Figure 3a and b. In Raman spectra, two typical Raman modes at around 1595 and 1340 cm−1 are clearly visible in all investigated ...
    ... is changed in the same manner as carbon content in the investigated samples. 3.1.4. SEM Analysis In order to explain and realize differences in morphological properties which occur due to activation by various hydroxides, SEM analyses of samples were performed and results are presented in Figure 5a–c ...

  • Alpine thermal events in the central Serbo-Macedonian Massif (southeastern Serbia)

    Milorad D. Antić, Alexandre Kounov, Branislav Trivić, Andreas Wetzel, Irena Peytcheva, Albrecht von Quadt (2015)
    General Earth and Planetary Sciences

  • Model predviđanja potresa od miniranja na površinskim kopovima primenom simulacione metode Monte Karlo i fazi logike

    Milanka N. Negovanović (2015-06-30)
    Modeliranje predviđanja potresa tla od miniranja primenom fazi logike i metode MonteKarlo zasnovano je na podacima dobijenim terenskim merenjima potresa uzrokovanihminiranjem. Promenljive modela definisane su analizom parametara bušenja i miniranjaminskih serija, kao i velosigrama izmerenih potresa od miniranja. Iskorišćene suprednosti fazi logike u implementaciji mnogo većeg broja ulaznih i izlaznih veličina zamodeliranje u odnosu na postojeće empirijske modele. Na osnovu identičnih podataka,dobijen je regresioni model predviđanja potresa, da bi se izvršilo testiranje novogmodela. U cilju povećanja pouzdanosti modela predviđanja, ...
    model, predviđanje potresa, miniranje, površinski kop, Monte Karlo, fazilogika, regresiona analiza, FFT analiza, spektri odziva, pomeraj pukotina
    ... Geotechnical Observations and Instrumentation in Tunneling, Vol. 2, The National Science Foundation, Grant GZ 33644X, 1975. 51. Kričak, L. Seizmika miniranja, Centar za miniranje, Rudarsko-geološki fakultet, Beograd, 2006. 52. Atlas Copco, Surface Drilling in Open Pit Mining, First edition, Atlas Copco ...
    ... Petkof, B., Spherical propagation of explosion-generated strain pulses in rock, USBM RI 5483, 1959. 5. Ambraseys, N. R., Hendron, A. J., Dynamic behaviour of rock mass, (eds. K. G. Stagg and O. C. Zienkiewics), Rock mechanics in engineering practices, London, John Wiley, 1968, 203-207. 6. Dowding ...
    ... to prevent rock damage, Proc. Tunnelling '79, 1979. 10. Shoop, S.A., Daemen J.J.K, Site-specific predictions of ground vibrations induced by blasting, In: Paper presented at the AIME spring meeting, Atlanta, March 1983. 11. Langefors, U., Kihlstrom, B., The modern techniques of rock blasting, New ...

  • Model predviđanja potresa od miniranja na površinskim kopovima primenom simulacione metode Monte Karlo i fazi logike

    Milanka N. Negovanović (2015-06-30)
    Modeliranje predviđanja potresa tla od miniranja primenom fazi logike i metode MonteKarlo zasnovano je na podacima dobijenim terenskim merenjima potresa uzrokovanihminiranjem. Promenljive modela definisane su analizom parametara bušenja i miniranjaminskih serija, kao i velosigrama izmerenih potresa od miniranja. Iskorišćene suprednosti fazi logike u implementaciji mnogo većeg broja ulaznih i izlaznih veličina zamodeliranje u odnosu na postojeće empirijske modele. Na osnovu identičnih podataka,dobijen je regresioni model predviđanja potresa, da bi se izvršilo testiranje novogmodela. U cilju povećanja pouzdanosti modela predviđanja, ...
    model, predviđanje potresa, miniranje, površinski kop, Monte Karlo, fazilogika, regresiona analiza, FFT analiza, spektri odziva, pomeraj pukotina
    ... Geotechnical Observations and Instrumentation in Tunneling, Vol. 2, The National Science Foundation, Grant GZ 33644X, 1975. 51. Kričak, L. Seizmika miniranja, Centar za miniranje, Rudarsko-geološki fakultet, Beograd, 2006. 52. Atlas Copco, Surface Drilling in Open Pit Mining, First edition, Atlas Copco ...
    ... Petkof, B., Spherical propagation of explosion-generated strain pulses in rock, USBM RI 5483, 1959. 5. Ambraseys, N. R., Hendron, A. J., Dynamic behaviour of rock mass, (eds. K. G. Stagg and O. C. Zienkiewics), Rock mechanics in engineering practices, London, John Wiley, 1968, 203-207. 6. Dowding ...
    ... to prevent rock damage, Proc. Tunnelling '79, 1979. 10. Shoop, S.A., Daemen J.J.K, Site-specific predictions of ground vibrations induced by blasting, In: Paper presented at the AIME spring meeting, Atlanta, March 1983. 11. Langefors, U., Kihlstrom, B., The modern techniques of rock blasting, New ...

  • New approach to correlation of hydrocarbon reservoirs in sandstone layers of the "Mokrin" field"

    Saša Ivanišević, Dejan Radivojević (2018)
    геофизички каротаж, депозиционе средине, лежишта угљоводоника, миоцен, пост‐ рифтнo, секвенциона стратиграфија
    ... ed in shallow‐water environments and are  recognized by progradation and aggradation series (Figure 1a and 1b). Kikinda Formation sediments are  sealed by the Paludina Formation represented by fluvial sediments.   Hemipelagic marls of the Hetin Formation are regarded as the main source rock  in the Serbian  ...
    ...    Funnel  shape of  the GR  log points  to  the  reduction  in  the basin water  level and  the  increase  in  the  level of  depositional energy, which leads to the reduction in the content of shale and increase in the content of  sand in the formation.  Bell shape of the GR log follows the trend o ...
    ... ian Basin  (Radivojević, 2014). Hydrocarbons present  in  the  sandstone  layers  in  the  area of the “Kikinda‐Mokrin” high are generated  in hemipelagic marls of the Hetin Formation which  is  deposited in the Banatsko Aranđelovo depression. In the exploration area of the “Kikinda‐Mokrin” high,  turbidite  ...

  • Петрологија црвених пешчара источне Србијe

    Андреј Марковић (2024)
    У источној Србији формација црвених пешчара има велико распрострањење и улази у састав многих планина овог дела наше земље. Формацију чине кластичне стене интензивно црвене боје псамитске, ређе псамитско-псефитске структуре и алевритске структуре. Ове стене леже трансгресивно преко старијих пермо-карбонских и карбонских стена, док навише прелазе у доњотријаске седименте. Формација црвених пешчара захвата два појаса унутар Карпато-балканида – унутрашњи и средишњи део. Узорци анализирани у овом раду део су средишњег појаса. Тема завршног рада је петрологија црвених пешчара источне ...
    источна Србија, црвени пешчар, петролошко-минералошке карактеристике, аркозе
    ... upgeHu neuuuap, nempojouwko-MuHepaaouuke kapakmepucmuke, apko3e. ABSTRACT Red sandstone formation in Eastern Serbia is widespreaded and is included in the composition of many mountains in this part of our country. This formation consists of intensely red-colored clastic rocks, psammitic, rarely ...
    ... and petrological-mineralogical parameters, analyzed sandstones are defined as siltstone sandstones-arkoses. They are built of quartz, feldspar, rock fragments, micas and binders. According to size, degree of roundness and sorting, they are determined as fine-grained medium-sorted sandstones-siltstone- ...
    ... KHceJIHHe (1:3) panu onpeljuBapba npucycrBa Kammara. boja y3opka je ojpeljaBaHa Ha JIHECBHOJ CBETJIOCTH ynopebuiBambeM ca craHnapnuMa rpeMa Munse// Rock-Color Book (Geological Society of 4merika, 2014, Cnaka 3). Cnuka 3. Crpanuna Mance:nopor karanora Goja HakoH MaKPpOCKOHCKe aHaJIH3c CTeHa, KOJOM ...