Претрага

Упит dcterms_subject_txt:rock mass oscillation equation

334 items

  • 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

  • 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)
    ... 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, explosive ...
    ... characteristic of the rock mass oscillation equation as well as the values of parameter m , which is mostly in the interval from 1 to 2, we can accept that it is 1 =1.5, which means that rock mass oscillation equation is reduced to the relation [6]: v=K-R"" (8) From equation (8) for K we get: ...
    ... conditioned by } v characteristics of the rock mass and blasting conditions. Thus, V is a decreasing and convex function of the variable R. By applying the equation of rock mass oscillation while blasting, the determination of the rock mass oscillation velocity is made possible for each blast operation ...

  • 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)
    ... Thus, we have obtained the oscillation law of rock mass, i.e., the equation of Sadovskii. 3.2. The Property of the Rock Mass Oscillation Equation The rock mass oscillation equation, given in the Equation (1) may be written in the form: v(R) = K·R−n. (7) Then from the Equation (7) for the derivation v′(R) ...
    ... Thus, we have obtained the oscillation law of rock mass, i.e., the equation of Sadovskii. 3.2. The Property of the Rock Mass Oscillation Equation The rock mass oscillation equation, given in the Equation (1) may be written in the form: v(R) = K-R™. (7) Then from the Equation (7) for the derivation v’(R) ...
    ... from the rock mass oscillation equation, which will be shown cases [8]. Let v1, v2, . . . , vN be the rock mass oscillation velocity values obtained for corresponding reduced distances R1, R2, . . . , RN. Proceeding from the equation for the rock mass oscillation velocity, given by the Equation (1) we ...

  • 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)
    ... form: R “ r r0 . Thus, we have obtained the oscillation law of rock mass, i.e., the equation of Sadovskii. 2.1.2. Derivation of Equation of Rock Mass Oscillation—Second Mode Here we give one more mode to derive the equation for the rock mass oscillation. If, by blasting in the specific environment ...
    ... Q—amount of explosive (kg); and R—reduced distance, expressed as R “ r 3?Q . 2.1. Derivation of Equation of Rock Mass Oscillation Law 2.1.1. Derivation of Equation of Rock Mass Oscillation—First Mode The equation of Sadovskii has been derived from the condition that if the radius of charge and the distance ...
    ... that the curve of the oscillation velocity of rock mass passes through the point M1(R1, v1). In that case from (1) for R = R1 and v = v1 we obtain: v1 “ K ¨ R´n 1 , where is: K “ v1 ¨ Rn 1 (13) By replacing values for K from Equation (13) into Equation (1) we obtain the equation: v “ v1 ¨ ˆ R1 R ...

  • 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)
    ... monitoring point m, Q - amount of explosive kg. 2.1. Derivation of equation of rock mass oscillation law If, by blasting in the specific environment, the relative increase in the oscillation velocity of the rock mass and the relative increase of the reduced distance are monitored, then it ...
    ... establish the relationship between the oscillation velocity of the rock mass and basic parameters affecting its magnitude, being: the amount of explosive, the distance from the blast site, characteristics of the rock mass and the type of blasting, it is the equation of M. A. Sadovski that is used most ...
    ... form: log log nv k R  from where it is obtained: nv K R  (5) being the equation of rock mass oscillation of M. A. Sadovski. The equation of Sadovski is commonly shown in the form: n redv K Q  (6) where is Qred reduced amount of explosive: ...

  • 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)
    ... according to model 2 In the rock mass oscillation velocity law given by equation (4) in the form: n RKv (4) parameter n can be determined by succes- sive approximations applying the Lagran- ge’s theorem 8 . If rock mass oscillation velocity law giv- en in equation (4) we differentiate by R, the ...
    ... Derivation of equation of rock mass oscillation law The equation of Sadovski has been de- rived from the condition: if the radius of charge and the distance from the blast site to the monitoring point increase in the same or approximately the same ratio, the soil oscillation velocity remains ...
    ... Engineering Bor 55 Thus, it was obtained the oscillation law of rock mass, i.e. the equation of Sadovski in the form: n RKv (4) 2.2 Models of determination the soil oscillation law parameters There are two parameters K and n in the equation (4) which should be determined for the specific ...

  • Analysis of Method for Determination of the Rock Mass Oscillation Equation Parameters in the Nepričava open pit

    Lutovac Suzana, Gluščević Branko, Tokalić Rade, Majstorović Jelena, Beljić Čedomir (2017)

  • 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 particles ...
    ... 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 paper ...

  • 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

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

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

  • Determination of Mechanical Properties of Altered Dacite by Laboratory Methods

    Veljko Rupar, Vladimir Čebašek, Vladimir Milisavljević, Dejan Stevanović, Nikola Živanović (2021)
    This paper presents a methodology for determining the uniaxial and triaxial compressive strength of heterogeneous material composed of dacite (D) and altered dacite (AD). A zone of gradual transition from altered dacite to dacite was observed in the rock mass. The mechanical properties of the rock material in that zone were determined by laboratory tests of composite samples that consisted of rock material discs. However, the functional dependence on the strength parameter alteration of the rock material (UCS, intact ...
    Geology, Geotechnical Engineering, Engineering Geology
    ... percentage of 30% AD. Comparison of the obtained exponential equation with practical suggestions shows a good correspondence. The suggested methodology for determining heterogeneous rock mass strength parameters allows us to determine the influence of rock material heterogeneity on the values σci UCS, σci TX ...
    ... reliable rock material strength parameter values, which can be used, along with rock mass classification systems, as a basis for assessing rock mass parameters. Therefore, it is possible to predict the strength parameters of the heterogeneous rock mass at the transition of hard (D) and weak rock (AD) based ...
    ... Intact rock properties σci and mi for homogeneous rock mass should be carefully considered. Using the hard rock properties to determine the overall strength of the rock mass is not appropriate. On the other hand, using the intact properties of the weak rock is too conservative as the hard rock skeleton ...

  • A model for estimation of stress-dependent deformation modulus of rock mass

    Slavko Torbica, Veljko Lapčević (2019)
    Deformation modulus, Young’s modulus, Rock mass, Stress

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

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

  • Non-Detonating Chemical Mixture for Non-Invasive Methods of Rock Breaking

    Lazar Kričak, Milanka Negovanović, Nikola Simić, Stefan Milanović (2024)
    Within the Innovation developed several different non-detonating chemical mixtures for non-invasive methods of rock breaking. Laboratory and polygon tests gave the satisfactory results and knowledge enough to start the practical experiments in the field. The basis of this innovation is a theoretical assumption that certain chemical mixtures release a large quantity of gases during combustion. If these gases are found in the enclosed space a growing pressure on the walls of the chamber in which combustion takes place will ...
    non-detonating, chemical mixture, rock breaking, borehole pressure

  • Hydraulic impact of pressure transients from water conveyance tunnel on the complex hydrogeological system: A case study HPP

    Igor Jemcov, Maja Todorović, Aleksandar Jemcov, Marina Ćuk Đurović (2024)
    Tunel pod pritiskom, Unutrašnji pijezometri, Tranzijenti pritiska, Karstna izdan, Pukotinska izdan, Hidraulički odziv
    ... significant hydraulic transients in the pressure tunnel, creating two characteristic unsteady flow phenomena: water hammer – WH and water mass oscillation – WMO (Fig. 3). The elastic properties of Water lead to the appearance of a hydraulic transient – WH, in the zone of appearance of the hi ...
    ... zones Conclusion This study represents the first exploration of the dynamic behavior of pore pressure, particularly water mass oscillations (WMO), within the rock mass under the operational conditions of a hydropower plant along the entire tunnel length, spanning from the surge tank up to the ...
    ... of the karst conduit system highly influenced by WMO transients. The study highlights the significance of monitoring water pressure within the rock mass as a fundamental element in analyzing the interaction between Water pressure tunnels and the hydrogeological environment. Applying the presented ...

  • Sensitivity analysis of rock mass parameters estimate influence on decline support design using NATM

    Slavko Torbica, Veljko Lapčević, Wang Gang, Nemanja Đokić, Miodrag Duranović (2019)
    Rock mass, Tunneling, NATM, GSI, Stress, Cukaru Peki, Bor

  • Application of Expansive Mortars for the Formation of Artificial Screens During Blasting in Urban Areas

    Milanka Negovanović, Lazar Kričak, Stefan Milanović, Nikola Simić, Jelena Majstorović (2024)
    During construction of buildings in urban areas, sometimes there is a need to blast solid rock mass in the immediate vicinity of the surrounding buildings. In that case, the aim is not only to increase the efficiency of blasting, but also to reduce harmful effects of ground vibration induced by blasting. At the same time, it is very important to protect the buildings located in the safe zone from the blast site as well as remaining rock mass around ...
    expansive mortar, artificial screens, pressure, rock breaking, building foundation

  • 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)

  • Some examples of interactions between certain rare earth elements and soil

    Zlatko Nikolovski, Jelena Isailović, Dejan Jeremić, Sabina Kovač, Ilija Brčeski (2021)
    Freundlich adsorption isotherm, sequential extraction, metallic ions, ICP-OES
    ... metallic ion adsorbed mass per mass of adsorbent on the equilibrium concentration of that ion in the solution- Freundlich adsorption isotherm. Parameters for adsorption intensity (n) and Freundlich isotherm constant (kf) are determined in the equation of the line, according to the equation (3). Also, the ...
    ... thus the equation is obtained (3): log q = log kf + 1/n log c1, (3) where log kf in the diagram represents the intercept at y axis, and 1/n the line inclination.26 Table II presents the values of the initial mass of the metallic ion (x0) - the mass of ions in solutions divided by the mass of the ...
    ... to its saturation. Sorption capacity is represented by equation (1): q = (co - c1 /m)V (1) where q is sorption capacity (mg g-1), co initial metallic ions solution concentration (mg L-1), c1 equilibrium concentration (mg L-1), m adsorbent mass (g) and V the solution volume (L).19 Preparation of ...

  • Linear-motor plunger pump increases lifting efficiency

    Bojan Martinović, Dušan Đekić, Dušan Danilović, Pavel Isaev (2022)
    plunger, linear, motor, pumps