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Упит dcterms_subject_txt:discontinuity orientation

83 items

  • Development and Application of Methodology for Quantification of Overbreaks in Hard Rock Tunnel Construction

    Zoran Berisavljević, Dragoljub Bajić, Vojkan Jovičić (2023)
    A methodology for determining overbreaks in hard rock tunnel construction using the drill-and-blast technique is presented in this paper. The methodology was developed for and applied to crystalline medium- to thick-bedded limestone, but it can be used in any jointed hard rock mass. Overbreaks are inevitable in hard rock tunnelling in a low-confinement environment (shallow tunnels up to several hundred meters deep) as a result of wedge failures along unfavourably oriented discontinuities caused by blasting. It is widely accepted ...
    hard rock, drill-and-blast, geological overbreak, technological overbreak, stability criterion, discontinuity orientation, tunnel construction

  • Advantages and Disadvantages of a Parallel and Zigzag Method of Acquisition in Walking Mode in Magnetometric Archeological Research

    Mirko Petković, Vesna Cvetkov, Branislav Sretenović (2014)
    магнетометријска испитивања, цик-цак и паралелна аквизиција у ходајућем моду, линеарне аномалије, археологија
    ... interval. The time intervals for automatic sampling in Fig. 1 Illustration of N-S orientation of traverses. Key: a. zigzag fashion; b. parallel fashion; c. mid-fi eld in parallel fashion. Fig. 2 Illustration of E-W orientation of traverses. Key as for Fig 1. 95 Archaeology and Science 10 (2014)Petković ...
    ... three measurements were performed in the same way as in the fi rst three methods of mea- suring when the orientation was in a north-south direction (Figure 2). Just as with the north-south orientation, each individual measurement was also saved in the same fi le with the included GPS. Figure 2 In the ...
    ... half of the polygon with the same orientation of profi les, and all the data Archaeology and Science 10 (2014) 96 Petković et al - Advantages and Disadvantages of a Parallel...(93-110) Fig. 3 Contour m ap of a vertical gradient of TM I in N -S orientation. K ey as for Fig 1. 97 Archaeology ...

  • Orientation and optical properties of methylene blue crystal for better understanding of interactions with clay mineral surface

    Milošević Maja, Logar Mihovil (2013)

  • Orientation and optical properties of methylene blue crystal for better understanding of interactions with clay mineral surface

    Milošević Maja, Logar Mihovil (2013)

  • Orientation and optical polarized spectra (380 – 900 nm) of methylene blue crystals on a glass surface

    Milošević Maja, Logar Mihovil, Poharc-Logar Vesna, Jakšić Ljiljana (2013)

  • Orientation and optical polarized spectra (380 – 900 nm) of methylene blue crystals on a glass surface

    Milošević Maja, Logar Mihovil, Poharc-Logar Vesna, Jakšić Ljiljana (2013)

  • Relation between crustal stress and thickness of earth's crust

    Slavko Torbica, Veljko Lapčević (2020)
    Crustal stress, Moho discontinuity, Deformation modulus

  • Утицај обртног магнетног поља на дерацемизацију кристала натријум-хлората

    М. Милојевић, А. Жекић, П. Дабић, Б. Вучетић, Б. Максимовић (2023)
    ... 1200 rpm, the amount of both enantiomers is approximately the same; at frequencies of 200, 400, and 1000 rpm, |. – orientation of crystals is dominant, while at 600 rpm, D – orientation of crystals is dominant. X-ray structural analysis showed that the size of the lattice parameter of the obtained ...
    ... ficld of strength B = (150+9) mT, at the rotational frequency 200- 1200 rpm with a step of 200 rpm. After the growth, which lasted about 4 h, the orientation of the crystals was determined by polarization microscopy. The results show that the rotational frequency of the field affects the fraction of ...

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

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

  • Cultural Heritage and Protection of Hand-Wheeled Pottery Manufacture in Western Serbia: Characteristics of Zlakusa Pottery Based on Sem-Eds and Optical Microscopy

    Milošević Maja, Zdravković Alena, Đordjević Biljana, Jelić Ivana (2021)
    ... pores in sample 1 are of random orientation and size, indicating slower rotations of the potter’s wheel during the manufacturing process. Sample 2 has a specific fluid-structure that is consistent with the way it was fabricated. By the size and orientation of the pores, it is evident that the ...

  • Tektonska evolucija severoistočnih Dinarida

    Nikola Ranđelović, Branislav Trivić, Nemanja Krstekanić, Bojan Kostić, Uroš Stojadinović (2022)
    ... n are represented by S1 foliation, folded into rare mm to dm-scale isoclinal and asymmetric folds with significant variability in fold-axis orientation. The second observed deformation phase is related to Middle Jurassic to Eocene convergent processes between Adriatic and European derived continental ...
    ... the late-phase brittle deformation is associated with the reactivation and formation of normal and dextral strike-slip faults with variable orientation and NE-dipping tension gashes. This paper has been financed by the „Contract on realisation and financing of scientific research of SRI in 2022“ ...

  • Evidence of Variscan and Alpine tectonics in the structural and thermochronological record of the central Serbo-Macedonian Massif (south-eastern Serbia)

    Milorad D. Antić, Alexandre Kounov, Branislav Trivić, Richard Spikings, Andreas Wetzel (2016)
    General Earth and Planetary Sciences
    ... Crenulation cleavage Sy intersects foliation S, at high angles and is generally subvertical to steep with appar- ently no preferred orientation (Fig. 4b). The orientation of by axes is determined by calculating the intersection of foliation S, folded into large open folds in outcrop scale, or by ...
    ... their original orientation was not pre- served due to reworking during D, as shown by the com- plete transposition of S,. However, the intersection angles between fold axes b, and by, ranging within 90% (Figs. 4, &b, 9), could be interpreted as a consequence of the initial orientation of b,, or ...
    ... limbs, the older foliation(s) are completely transposed. Although its orientation generally varies in individual domains presented above, the fold axes b, of recumbent isoclinal folds F, most often show similar orientation to that of the stretching lineation, which is assumed to be formed during ...

  • Complex geophysical survey on solving the problem of water loss in the karst terrain reservoir

    Branislav Sretković, Dejan Vučković (2023)
    Geophysical surveys in karst terrain are always a specific challenge. Each of them requires a careful consideration of the problem, specific conditions on the ground, the selection of adequate methods applicable in that specific and unique karst area. But they should have one thing in common: a complex approach and looking at the problem from wider to narrower, with a gradual narrowing of the investigation area, increasing the spatial precision and resolution of the obtained data. On the example of ...

  • The final closure of the Vardar Ocean: paleomagnetic, AMS and structural results

    Emö Márton, Marinko Toljić, Vesna Lesić, Vesna Cvetkov (2020)
    ... These observations form the Sava zone will be discussed in the context of the post-Oligocene CW rotation of the flanking areas and the general NE-SW orientation of thecompressional stress field outside of the zone. Acknowledgement. This work was financially supported by the National Development andInnovation ...

  • Poboljšanje geotehničkih uslova izgradnje nasipa upotrebom geosintetika

    Anastasija Radovanović (2024)
    Za potrebe izrade rada na Master akademskim studijama ,,Rudarsko-geološkog fakulteta,,, studijskog programa Geotehnika, pod mentorstvom prof. dr Gordane Hadži-Niković , izvršena je detaljna analiza stabilnosti kosina nasipa na Vranjskoj petlji. Geotehnička istraţivanja i ispitivanja terena izveo je “Zavod za geotehniku iz Instituta za puteve a.d. Beograd”, a investitor je “Javno preduzeće, Putevi Srbije”.Metodološki pristup koji je korišćen za analizu stabilnosti kosina nasipa jeste kabinetsko istraživanje dostavljene dokumentacije i geostatički proračuni analize stabilnosti kosina nasipa, korišćenjem savremenih softverskih alata.Krajnji zaključak izvedenih istraţivanja je da ...
    tlo, nasip, analiza stabilnosti, faktor sigurnosti, geosintetici
    ... 60 50 40 Material Friction ŠIBED Force Strip Tenslie Support Name | Color Type Force Application Dependent Adhesion Angle S't\:;r;getlh Orientation Anchorage Coverage | Strength Bisector of Support1 - GeoTextile | Active (Method A) No 0 21 Linear | Paralleland | Slope Face 100 40 Tangent ...
    ... Surface | Constant Material Friction ŠIBED Force Strip Tenslie Support Name | Color Type Force Application Dependent Adhesion Angle S't\:;r;getlh Orientation Anchorage Coverage | Strength Bisector of Support1 - GeoTextile | Active (Method A) No 0 21 Linear | Paralleland | Slope Face 100 40 Tangent ...
    ... O D_– ~ D_– i D; O _ Shear J Material Force Strip Tenslie ] Support Name | Color Force Application Dependent Adhesion s:lr:;getlh Orientation Anchorage Coverage | Strength i Bisector of e Support 1 Active (Method A) Linear | PParalleland | Slope Face | Tangent e | i T T T T T T ...

  • Damage quantification of built stone on Dark Gate (Belgrade, Serbia): sample of damage index application for decay rate evaluation

    Maja Franković, Nevenka Novaković, Vesna Matović (2015)
    The Dark Gate is the monument of culture, part of the cultural and historical complex of the Belgrade Fortress. It is constructed of limestone blocks that after 270 years of exposure to environmental conditions and different anthropogenic influences show wide ranges of decay forms. During 2007, detail registration of all built limestone microfacies and weathering forms was done using tools of monument mapping. A correlation scheme ‘‘intensity– damage category’’ was made according to the type, intensity, and distribution of ...
    Krečnjak, mapiranje, Indeks raspadanja, brzina raspadanja, progresija
    ... oriented to east and west. Damage indices were calculated for every zone separately in order to evaluate weathering rates according to monument's orientation. In 2014, re-evaluation was done in order to verify the condition of the stone and assess degradation rate over the past 7 years. Documentation ...
    ... South facade (%) North facade (%) East half (%) West half (%) fagade and related to (he gate's 2007 2014 2007 2084 2007 2014 2007 2014 2007 2004 orientation || 71 7 8 8 3 ı 7 6 7 7 2 2 21 20 19 27 27 21 22 24 19 3 4 4 4 42 44 42 40 38 47 4 4 19 I8 20 18 16 18 21 200 - I6 16 5 0 208 13 10 12 u 4 6 ...
    ... index Dark gate”s facade damage index for 2007 and 2014 for the whole facade and Total South North East half West half related to the gate”s orientation 2007 20814 2007 20814 2007 20814 2007 2014 2007 2014 DiLin 3.01 307 5%300 309 ᒷ 5313 308 3104 290 3.05% Diprog 3.18 325 3107 328 3148 328 ...

  • Fault type assessment based on vertical gravity gradient anomalies – advantages and limitations

    Ivana Vasiljević, Snežana Ignjatović, Branislav Sretković (2024)
    The type of dip-slip faults can be assessed based on the analysis of vertical gravity gradients. Theoretically, just a simple comparation of the gradient extreme values can give us an answer whether the fault is normal or reverse (thrust). Practical application of this method is far more complicated and the results depend on a number of parameters, such as a complexity of geological setting, the quality of gravity data, dip angle and displacement of the fault, density contrast, etc. ...
    dip-slip faults, vertical gravity gradients, field data analysis
    ... line (dashed lines on the graphs on Fig. 1 and Fig. 2) is sharper and narrower, while the other extreme has more rounded shape. The general orientation of the fault dip can be determined casily — the dip is always orientated from sharper towards the more rounded extreme of the VGG curve (from ...
    ... position of the faults FIb and F2b (orange dashed lines on Fig. 2b) from the position of the faults Fla and F2a on the geological map, while the orientation of faults dip is the same. [] ? 4 6 8 10 12 14 South Morava x [km] Fla FIb F2a F2b River F3 F4 i i vi < VOA - K i (b) s VOA V X V ...
    ... relative magnitude of the VGG extremes can be used to determine the disposition of lower and higher density block of the fault, as well as the dip orientation of an interface. On the other hand, the layout of the fault blocks of different density, and hence the VVG, cannot be associated unambiguously ...

  • Tectonic evolution of the Vršac Mts. (NE Serbia): Inferences from field kinematic and microstructural investigations

    Uroš Stojadinović, Nemanja Krstekanić, Bojan Kostić, Marija Ružić, Aleksa Luković (2021)
    The Vršac Mts. in NE Serbia represent the key area to investigate structural relations between the Northern Serbo-Macedonian Subunit and Supragetic Unit of the Dacia Mega-Unit. The geodynamic events during the Variscan orogeny in the Late Paleozoic colligated the two units and led to their metamorphic differentiation. The Late Cretaceous extension exhumed the medium-grade Serbo-Macedonian metamorphic rocks and structurally juxtaposed them against the low-grade metamorphosed basement of the Supragetic Unit along an E-dipping shear zone, which outcrops in the ...
    severna srpsko-makedonska subjedinica, supragetikum, kinematska analiza, multifazna ekstenzionalna deformacija
    ... Subunit and the Supragetic Unit, we conducted structural analyses across various scales. On the map scale we statisti- cally analysed foliation orientation measurements obtained during the geological mapping of the Vršac Mts. (Vuković et al. 1965, 1970). Foliation dip direction/dip and stretching ...
    ... Pre-Alpine granite C ity of Vršac 399TECTONIC EVOLUTION OF THE VRŠAC MTS. (NE SERBIA) GEOLOGICA CARPATHICA, 2021, 72, 5, 395–405 foliation orientation (SMM-F in Fig. 3) that changes from northward- and north-eastward-dipping in the west to more eastward-dipping closer to the contact with the ...
    ... zone which is demon- strated by a retrograde greenschist metamorphic overprint associated with pervasive stretching lineation that has uniform orientation on both sides and even at higher distances to the detachment and is irrespective to the pre-existing foliation 401TECTONIC EVOLUTION OF THE ...

  • Pre-failure deformation monitoring as rockfall prediction tool

    Miloš Marjanović, Biljana Abolmasov, Zoran Berisavljević, Marko Pejić, Petko Vranić (2021)
    General Engineering
    ... become entirely systematic. Slope kinematic potential and joint distribution were reported in [7,8]. One set of bedding (orientation 39/44°) and two conjugated joint sets (orientation 187/62° and 148/79°) were established, appointing to the block and wedge failure potential. Rock block size and volumes ...
    ... activity highlighting the two top block detachments, each of about 1x1x0.5 m in size. Detachment occurs along one of the slope-forming joint sets (orientation 187/62°) that daylights locally across the slope. The tensile strength of arguably 30 MPa that holds the blocks in such daylighting setting is ...

  • Characterization of Natural Clay from Bogovina (Serbia) and Possible Utilization in Sorption of the Herbicides

    Lazar Kaluđerović, Zorica Tomić, Rada Đurović-Pejčev, Maja Milošević (2021)
    ... degree of saturation, the long-chain organic complex can exhibit different arrangements in the interlayer space, from monolayer to paraffin orientation. On the other hand, montmorillonite modified with PTMA complex exhibited monolayer arrangement of cations on the surface of montmorillonite ...