Претрага

Упит dcterms_subject_txt:inverse velocity

95 items

  • Failure Estimation of the Majdanpek Open Pit East Face Based on Inverse Velocity Model

    Miloš Marjanović, Stefan Milanović, Nikola Simić, Lazar Kričak (2024)
    The Majdanpek open pit mine south district is currently active mining prospect of copper ore exploitation in eastern Serbia. Its depth is approaching the termination depth and occurrences of large-scale instabilities and global instability of the final pit slope is possible. These can generate catastrophic mass movement inside an area that encloses a regional road route and the Pek River bed which is channelled along the outer contour of the pit. The displacements that were noted in early 2023, in the ...
    displacement, survey, inverse velocity, open pit

  • Analysis of a simplified model for determining rock mass oscillation velocity at the Kovilovača open pit

    Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Luka Crnogorac (2023)
    ... oscillation velocity components can be recorded in directions X , } and Z from the rectangular coordination system, as follows: • YV, —rock mass oscillation velocity horizontal transversal component, • V, — rock mass oscillation velocity vertical component, • Y, — rock mass oscillation velocity horizontal ...
    ... on that, maximum, i.e., resulting rock mass oscillation velocity V, can be determined using following equation: 2 2 2 V,OS NM +V TV 3 Q) 3. ROCK MASS OSCILLATION VELOCITY EQUATION Rock mass oscillation velocity equation defines velocity alteration of rock mass oscillation depending on distance ...
    ... commonly used, represents the rock mass oscillation velocity. As the relation between rock mass oscillation velocity and the basic parameters that influence its magnitude, most often is used the M.A. Sadovskii equation where oscillation velocity V is given in the form of: v=K-R"; (D where R is ...

  • Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings

    Suzana Lutovac, Branko Gluščević, Rade Tokalić, Jelena Majstorović, Čedomir Beljić (2018)
    ... component vv. Based on three oscillation velocity components resulting rock mass oscillation velocity may be determined vrez = √ v2 t + v2 l + v2 v, in the equation of Sadovskii: oscillation velocity. In Figure 1 is shown the recording of oscillation velocity of the ground intended for blasting No ...
    ... vertical component vp. Based on three oscillation velocity components resulting rock mass oscillation velocity may be determined v;¢z = /v? + vf + v2, in the equation of Sadovskii: oscillation velocity. In Figure 1 is shown the recording of oscillation velocity of the ground intended for blasting No. I—measuring ...
    ... Rock Mass Oscillation Velocity Intensity of the shock is measured by instruments—seismographs, in the field. The main parts of a seismograph are sensors—geophones by way of which rock mass oscillation velocity is being recorded. Measuring of the rock mass oscillation velocity needed for this paper has ...

  • Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine

    Suzana Lutovac, Sanja Bajić, Marina Ravilić, Radmila Gaćina (2015)
    ... applied. Thereby, it has been stated that both models can be used to calculate the oscillation velocity of the rock mass. Key words: working environment, blasting, seismic effect, oscillation velocity, soil oscillation law 1 University of Belgrade – Faculty of Minig ...
    ... between the soil oscillation velocity and basic parameters affecting its magnitude, being: the amount of explosive, a distance from the blast site, characteristics of the rock material and a type of blasting, the equation of M.A. Sadovski, where the oscillation velocity v is given in the form of the ...
    ... whereby the connection, between the velocity of soil oscillation and consequences that can affect facilities, is used. The equation of M.A. Sadovski is given in the form: 3 n r v K Q           (1) where there are: v - velocity of soil oscillation [cm/s], K - ...

  • Correlation of uniaxial compressive strength with the dynamic elastic modulus, p –wave velocity and s –wave velocity of different rock types

    Jelena Majstorović, Miloš Gligorić, Suzana Lutovac, Milanka Negovanović, Luka Crnogorac (2019)
    Knowing mechanical properties of rocks incorporated with ultrasonic waves velocities investigations provide a secure basis for mine modelling. Uniaxial compressive strength, dynamic elastic modulus and ultrasonic waves velocities are just some of the rock properties that indicate on presence of discontinuities, stratification and fissures of rocks. Determining the relationship of these rock properties testing the rock samples that are corresponding to different rock types extracted from different mineral deposits represents the core of this study. In this paper, we ...
    линеарна регресија, метода најмањих квадрата, динамички модул еластиности, брзина уздужних таласа

  • Some models for determination of parameters of the soil oscillation law during blasting operations

    Suzana Lutovac, Dragan Medenica, Branko Gluščević, Rade Tokalić, Čedomir Beljić (2018)
    ... three models can be used to calculate the oscillation velocity of the rock mass. Keywords: working environment; blasting; seismic effect; oscillation velocity; soil oscillation law 1. Introduction As the relation between the soil oscillation velocity and basic parameters affecting its magnitude, being: ...
    ... the oscillation velocity and three basic parameters affecting its size, the explosive quantity, properties of rock material, and the distance, several mathematical models have been developed. One of the most frequently used models is the equation of Sadovskii defining the law on velocity alteration of ...
    ... settlement, whereby the connection, between the velocity of soil oscillation and consequences that can affect facilities, is used. The equation of M.A. Sadovskii is given in the form: v “ K ¨ R´n “ K ¨ ˆ r 3 ? Q ˙´n (2) where we have: v—velocity of soil oscillation (m/s); K—coefficient conditioned ...

  • Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit

    Suzana Lutovac, Nebojša Vidanović, Čedomir Beljić, Zoran Gligorić (2015)
    ... theorem. Thereby, it has been stated that both models can be used to calculate the oscillation velocity of the rock mass. Keywords: working environment, blasting, seismic effect, oscillation velocity, soil oscillation law * University ...
    ... between the soil oscilla- tion velocity and basic parameters affecting its magnitude, being: the amount of explo- sive, a distance from the blast site, character- istics of the rock material and a type of blast- ing, the equation of M.A. Sadovski, where the oscillation velocity v is given in the form of ...
    ... facility or a settlement, whereby the connection, between the velocity of soil os- cillation and consequences that can affect facilities, is used. The equation of M.A Sadovski is given in the form: n 3 Q r Kv (1) where: v - velocity of soil oscillation [cm/s] K - coefficient conditioned by ...

  • Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and redused distances at “Kovilovača“ surface mine

    Lutovac Suzana, Beljić Čedomir, Gligorić Zoran, Gluščević Branko (2015)

  • Simplified model for determining rock mass oscillation velocity at limestone deposit

    Suzana Lutovac, Branko Gluščević, Miloš Gligorić, Jelena Majstorović, Rade Tokalić (2022)

  • Numerical modeling of Selanac debris flow propagation using SPH code

    Jelka Krušić, Biljana Abolmasov, Miloš Marjanović, Manuel Pastor, Saeid M. Tayyebi (2021)
    The Selanac debris flow is a very huge event triggered after extreme rainfall caused by Cyclone Tamara activity in the Republic of Serbia in May 2014. The Selanac case study was already modelling in different programs using Voellmy rheology assumptions like RAMMS software. In this paper research are focusing particularly on the process of debris flowing from initiation zone to main deposition area using Geoflow SPH two-phase model considering frictional rheology law. Main rheological parameters are back-calculated using also ...
    debris flow, modelling, SPH code, DEM
    ... time derivative of the ground surface elevation, which is supposed equal the product of velocity (v), propagation height (h) and “landslide grow rate” (Er). The latter is independent to the flow velocity and is related by Hungr (1995) to the initial and final landslide volume as well as to the ...
    ... both the height and velocity of the propagating mass at each point of the landslide path. The er and Er are related by the equation (5) The erosion rate can be modelled as proportional to the product of velocity (v) and propagation height ...
    ... in absence of numerical grid, and while mass is presented with particles of solid and fluid phase. Each particle has information about height, velocity as well as pore water pressure if coupled model is included. Geoflow SPH proposed by Pastor 2009, already has been used on different cases in the ...

  • 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)

  • Correlability of Solar Wind with Seismic Events in the Balkan Peninsula Zone

    Filip Arnaut, Dejan Vučković, Ivana Vasiljević, Vesna Cvetkov (2021)
    The Solar Heliospheric Observatory (SOHO) satellite was launched on the 2nd of December 1995 at L1 Lagrange point (1.5×106 km from Earth) with the purpose of gathering data for helioseismology, remote sensing of the solar atmosphere, and solar wind in situ. The satellite was positioned into orbit in early 1996, with data acquisition expected to commence on January 20th. The correlation between increased values of solar wind parameters and earthquakes in the Balkan peninsula zone between 1996 and 2018 ...
    предвиђање потреса, соларни ветар, статистичка валидација узрочника потреса

  • Simpson's rule application for experimental determining parameters of rock mass oscillation equation at limestone

    Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Branko Gluščević, Luka Crnogorac (2021)
    By its form, the use of explosives has a destructive character. However, energy of chemical explosives is tamed and perfected in many effects, so that is developed a series of activities which work is unthinkable without the use of explosives. In mining industry, explosives are most commonly used for exploitation in hard rock mass. Thereby, large amounts of explosives can be used, especially for mass blasting. The application of large amounts of explosives gives auspicious techno – economic indicators ...
    working environment, seismic effects of blasting, oscillation velocity, rock mass oscillation equation, Simpson’s rule

  • Модел миграције нитрата у епикарсту: лабораторијски експеримент

    Бранислав Петровић (2022)
    Епикарст је део карстног изданског система који се налази у зони аерације и представља сложену област додира и мешања неконсолидованог материјала са површине терена, остатака карбонатних стена измењених корозивном водом, флоре и фауне и њихових остатака, који је делимично и повремено засићен подземном водом. Подручје истраживања примењених мултидисциплинарних истраживања био је карстни масив Суве планине (ЈИ Србија), односно подручје око мале пећине Печ, настале у епикарсту. Између осталих истраживања, опит трасирања (На-флуоресцеин) у пећини Печ помогао је у одређивању ...
    епикарст, модел, нитрати, специфична електрична проводљивост

  • 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

  • Numerical modelling of the roughly simultaneous emplacement of two distinct ophiolite belts

    Nikola Stanković, Vesna Cvetkov, Vladica Cvetković (2024)

  • Investigation of quantitative indicators of anisotropy based on longitudinal elastic waves propagation velocities with uncertainty

    Miloš Gligorić, Jelena Majstorović, Suzana Lutovac (2018)
    ... and dry P-wave velocity of rocks. Ultrasonics, 46, pp. 341–348. KILIC O. (2006) The influence of high temperatures on limestone P-wave velocity and Schmidt hammer strength. International Journal of Rock Mechanics and Mining Sciences, 43, pp. 980–986. MELAKU M. T. (2007) Velocity Anisotropy of ...
    ... treatment of Gotland sandstone by use of ultrasound pulse velocity measurements. In: Heritage, weathering and conservation. 2nd ed. London: Taylor and Francis Group plc; pp. 749-756 PETRUŽÁLEK M. et al. (2008) Changes of anisotropy of p-wave velocity propagation during deformation process of rock samples ...
    ... and Malaga, 2006; Sousa et al., 2005; Valdelon et al., 1996; Vasanelli et al., 2015; Yavuz et al., 2006). Measuring method of ultrasonic waves velocity propagation is based on the modelling of the wave propagation process. The process of induction and wave emission is repeated ...

  • Groundwater gravitational circulation of Karst Veliko Vrelo and Malo Vrelo springs by isotope and the noble gas method: case study of the Beljanica Massif

    Ljiljana Vasić, Laszlo Palcsu, Huang Fen (2019)
    Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry

  • Numerical simulation of the Late Jurassic closure of the Vardar Tethys

    Nikola Stanković, Vesna Cvetkov, Vladica Cvetković (2021)
    ... amid-oceanic ridge. Intraoceanic subduction is initiated along the ridge by assigning a weak zonebeneath the ridge. Time-dependent boundary conditions for velocity are imposed on thesimulation in order to model a transient spreading period. The change of sign in plate velocities isfound to be useful for both ...
    ... emplacement [Duretz et al., 2016] andcausing back-arc extension. Changes in velocities are linear in time. Simulations follow a three-phase evolution of velocity boundary conditions consisting of two convergent phases separated bya single divergent phase where spreading regime is dominant. Effect of duration ...

  • 2D Numerical Simulation of Intraoceanic Subduction during the Upper Jurassic Closure of the Vardar Tethys

    Nikola Stanković, Vesna Cvetkov, Vladica Cvetković (2020)
    ... amid-oceanic ridge. Intraoceanic subduction is initiated along the ridge by assigning a weak zonebeneath the ridge. Time-dependent boundary conditions for velocity are imposed on thesimulation in order to model a transient spreading period. The change of sign in plate velocities isfound to be useful for both ...
    ... emplacement [Duretz et al., 2016] andcausing back-arc extension. Changes in velocities are linear in time. Simulations follow a three-phase evolution of velocity boundary conditions consisting of two convergent phases separated bya single divergent phase where spreading regime is dominant. Effect of duration ...