Претрага
304 items
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Simpson's rule application for experimental determining parameters of rock mass oscillation equation at limestone
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 ruleSuzana Lutovac, Miloš Gligorić, Jelena Majstorović, Branko Gluščević, Luka Crnogorac. "Simpson's rule application for experimental determining parameters of rock mass oscillation equation at limestone" in 8th International Conference Mining and Environmental Protection, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia (2021)
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Analysis of a simplified model for determining rock mass oscillation velocity at the Kovilovača open pit
... 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 ...Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Luka Crnogorac. "Analysis of a simplified model for determining rock mass oscillation velocity at the Kovilovača open pit" in 9th International Conference Mining and Environmental protection MEP, 24 – 27 May 2023, Sokobanja, Serbia, Belgrade : University of Belgrade-Faculty of mining and geology (2023)
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Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings
... 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 ...Suzana Lutovac, Branko Gluščević, Rade Tokalić, Jelena Majstorović, Čedomir Beljić. "Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings" in Minerals, Basel : MDPI AG, Basel, Switzerland (2018). https://doi.org/10.3390/min8020070
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Some models for determination of parameters of the soil oscillation law during blasting operations
... 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 ...Suzana Lutovac, Dragan Medenica, Branko Gluščević, Rade Tokalić, Čedomir Beljić. "Some models for determination of parameters of the soil oscillation law during blasting operations" in Energies, Basel, Switzerland : MDPI (2018). https://doi.org/10.3390/en9080617
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Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine
... 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 ...
... common model (Simeunović, 1985). Determination of parameters by model 2 Proceeding from the rock mass oscillation law from the equation (5): nv K R Parameter determination of soil oscillation law ... 13 ...Suzana Lutovac, Sanja Bajić, Marina Ravilić, Radmila Gaćina. "Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine" in Underground Mining Engineering, Belgrade : University of Belgrade, Faculty of Mining and Geology (2015). https://doi.org/10.5937/podrad1526009L
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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. "Analysis of Method for Determination of the Rock Mass Oscillation Equation Parameters in the Nepričava open pit" in 6th International Symposium MINING AND ENVIRONMENTAL PROTECTION, Vrdnik, Serbia, 21-24.06.2017, Belgrade:Faculty of Mining and Geology, CENTER FOR ENVIRONMENTAL INGENEERING (2017): 317-323
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Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit
... 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 ...Suzana Lutovac, Nebojša Vidanović, Čedomir Beljić, Zoran Gligorić. "Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit" in Mining and Metallurgy Engineering Bor, Bor : Mining and Metallurgy Institute Bor (2015). https://doi.org/10.5937/MMEB1503053L
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Primena programa UVSZ pri zaštiti od miniranja
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... 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 ...Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Luka Crnogorac, Rade Tokalić. "Primena programa UVSZ pri zaštiti od miniranja" in XIII skup privrednika i naučnika SPIN’21, Industrija 4.0 – mogu nosti, izazovi i rešenja za digitalnu transformaciju privrede, Univerzitet u Beogradu, Fakultet organizacionih nauka (2021)
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Analiza seizmičkog dejstva eksplozije pri miniranju na primeru izrade tunela Golubac kod Golupca
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 ...Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Luka Crnogorac. "Analiza seizmičkog dejstva eksplozije pri miniranju na primeru izrade tunela Golubac kod Golupca" in XV Međunarodna konferencija OMC 2022, Zlatibor, 12-15. oktobar 2022., Jugoslovenski komitet za površinsku eksploataciju (2022)
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Simplified model for determining rock mass oscillation velocity at limestone deposit
Suzana Lutovac, Branko Gluščević, Miloš Gligorić, Jelena Majstorović, Rade Tokalić. "Simplified model for determining rock mass oscillation velocity at limestone deposit" in Prospects for developing resource-saving technologies in mineral mining and processing, UNIVERSITAS Publishing - Petrosani, Romania (2022)
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Determination of Mechanical Properties of Altered Dacite by Laboratory Methods
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 ...... 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 ...Veljko Rupar, Vladimir Čebašek, Vladimir Milisavljević, Dejan Stevanović, Nikola Živanović. "Determination of Mechanical Properties of Altered Dacite by Laboratory Methods" in Minerals, MDPI AG (2021). https://doi.org/10.3390/min11080813
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A model for estimation of stress-dependent deformation modulus of rock mass
Slavko Torbica, Veljko Lapčević (2019)Slavko Torbica, Veljko Lapčević. "A model for estimation of stress-dependent deformation modulus of rock mass" in International Journal of Mining and Geo-Engineering (2019). https://doi.org/10.22059/IJMGE.2018.255295.594729
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Model for estimation of stress field in the earth's crust
Slavko Torbica, Veljko Lapčević (2016)Slavko Torbica, Veljko Lapčević. "Model for estimation of stress field in the earth's crust" in Podzemni radovi (2016). https://doi.org/10.5937/podrad1628009T
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Non-Detonating Chemical Mixture for Non-Invasive Methods of Rock Breaking
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 ...Lazar Kričak, Milanka Negovanović, Nikola Simić, Stefan Milanović. "Non-Detonating Chemical Mixture for Non-Invasive Methods of Rock Breaking" in X International Scientific Congress Innovations 2024, Varna, Bulgaria, 24-27. jun 2024, Scientific Technical Union of Mechanical Engineering "Industry 4.0" (2024)
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Sensitivity analysis of rock mass parameters estimate influence on decline support design using NATM
Slavko Torbica, Veljko Lapčević, Wang Gang, Nemanja Đokić, Miodrag Duranović. "Sensitivity analysis of rock mass parameters estimate influence on decline support design using NATM" in Podzemni radovi (2019). https://doi.org/10.5937/PodRad1934027T
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Application of Expansive Mortars for the Formation of Artificial Screens During Blasting in Urban Areas
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 ...Milanka Negovanović, Lazar Kričak, Stefan Milanović, Nikola Simić, Jelena Majstorović. "Application of Expansive Mortars for the Formation of Artificial Screens During Blasting in Urban Areas" in 31st International Conference Ecological Truth & Environmental Research-EcoTER'24, Sokobanja, 18-21. jun 2024, Bor : Tehnički fakultet u Boru (2024)
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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. "Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and redused distances at “Kovilovača“ surface mine" in 5th International Symposium MINING AND ENVIRONMENTAL PROTECTION, Vrdnik, Serbia, Belgrade:University of Belgrade, Faculty of Mining and Geology (2015): 376-384
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Some examples of interactions between certain rare earth elements and soil
... 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 ...Zlatko Nikolovski, Jelena Isailović, Dejan Jeremić, Sabina Kovač, Ilija Brčeski. "Some examples of interactions between certain rare earth elements and soil" in Journal of the Serbian Chemical Society, National Library of Serbia (2021). https://doi.org/10.2298/JSC211006095N
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Parameter determination of soil oscillation law in limestone
Lutovac Suzana, Trajković Slobodan, Katona Orsolja, Savić Ljubinko, Leković Branko. "Parameter determination of soil oscillation law in limestone" in Technics Technologies Education Management / TTEM 7 no. 1, Sarajevo:Drunpp (2012): 376-383
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Дефинисање механичких својстава алтерисаног стенског материјала лабораторијским методама
Вељко М. Рупар (2022)Основни циљ овог рада је да представи методологију одређивања механичких својстава хетерогеног стенског масива који изграђују дацит (Д) и алтерисани дацит (АД), где је уочена је зона постепеног преласка од алтерисаног дацита до дацита. Механичка својства стенског масива у тој зони утврђена су на основу лабораторијских испитивања једноосне и троосне чврстоће на притисак стенског материјала композитних узорака. Композитни узорци су се састојали од дискова стенског материјала, при чему је висина дискова h дефинисала различити процентуални удео појединог стенског материјала, ...дацит, алтерисани дацит, једноосна чврстоћа на притисак, троосна чврстоћа на притисак, композитни узорци, механика стена, стабилност косинаВељко М. Рупар. Дефинисање механичких својстава алтерисаног стенског материјала лабораторијским методама, Београд : [В. Рупар], 2022