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Упит dcterms_subject_txt:hard rock

327 items

  • 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

  • Jointed rock mass characterization using field and point-cloud data

    Marjanović Miloš, Pejić Marko, Đurić Uroš, Krušić Jelka, Abolmasov Biljana (2018)

  • Развој модела конструкције просторија отварања рудника са подземном експлоатацијом

    Dražana M. Tošić (2016-08-26)
    Приликом израде подземних просторија у стјенској маси долази до нарушавања природне равнотеже напонских стања стијенског масива који су владали прије израде тих просторија, при чему долази до појаве прертасподјеле напона и његове концентрације у појединим правцима и тачкама, односно долази до појаве пластичних деформација које су праћене ломљењем стијенске масе и кретањима материјала према откопаном простору...
    модел, метод коначних елемената, просторија отварања, напон, дефеормација стијенског масива, алгоритам функционалних зависности

  • 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

  • Composition of organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in East Herzegovina (External Dinarides, Bosnia and Herzegovina)

    Nikoleta Aleksić, Aleksandar Kostić, Miloš Radonjić (2021)
    This paper presents the first data on the organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in the East Herzegovina region of the External Dinarides. Representative, organic-rich samples from outcropping sedimentary rocks of different ages in the area (Triassic to Neogene) were selected and analysed. The organic matter was studied by Rock-Eval pyrolysis and under the microscope in reflected non-polarized light and incident blue light. The results obtained show the presence of different types of organic ...
    nafta i gas, Rock-Eval, refleksija vitrinita, maceral, termička zrelost
    ... fraction (< 2 mm) was used for preparing petrographic “whole rock” specimens (polished block), and the pulverized rock (0.10–0.25 mm) was used for Rock-Eval pyrolysis. Methods In this study, common analytical methods were used: Rock-Eval pyrolysis and organic petrographic investiga- tions, including ...
    ... crushed fraction (< 2 mm) was used for preparing petrographic “whole rock” specimens (polished block), and the pulverized rock (0.10-0.25 mm) was used for Rock-Eval pyrolysis. Methods In this study, common analytical methods were used: Rock-Eval pyrolysis and organic petrographic investiga- tions, including ...
    ... parameters of the Rock-Eval pyrolysis of the samples analysed. T – Triassic; J – Jurassic, K – Cretaceous, E – Eocene, M – Miocene; TOC – total organic carbon (wt.%), HC – hydrocarbons, S1 – free HC (mg HC/g rock) released at 300 ºC; S2 – HC generated during pyrolysis (mg HC/g rock) from 300 to 650 ...

  • 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)
    ... crushes rock mass, a bit further creates cracks and permanent deformations in the rock mass, and even further it is being transformed into elastic deformations. The effect of elastic seismic wave is movement of particles of the rock mass from its equilibrium position. Such oscillation of the rock mass ...
    ... 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 can ...
    ... To 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 ...

  • 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
    ... depends on various factors, including the permeability of rock masses in the immediate tunnel zone and groundwater pressure (Schleiss, 1997, Fernandez and Moon, 2010, Moon and jeong, 2011 ). Usually, in complex geological conditions in hard rocks, tunnels with a large diameter are made of unreinforced ...
    ... emphasized in highly fractured rock masses, where the number of cracks in the lining is directly related to fracture density (Ponimatkin, 1977). Regarding high-pressure tunnels in solid rock, the critical design emphasis should be placed on the surrounding rock instead of the lining, making the ...
    ... Introduction Hydraulic runnels for hydropower plant (HPP) operation passing through rock masses represent challenges not only in design and construction but also in long-term operation. The heterogeneity of rock masses, particularly the spatial variability of hydraulic conductivity, is a key factor ...

  • Rock excavation methods in urban areas

    Stefan Milanović, Lazar Kričak, Milanka Negovanović, Nikola Simić, Jovan Marković, Nikola Đokić (2023)
    Povećan obim građevinskih radova, koji podrazumevaju izgradnju novih stambenih i poslovnih objekata, hotela, garaža, tržnih centara i slično, sve je češći u urbanim sredinama. Ovakvi radovi sve više dolaze u kontakt sa različitom vrstom problema prilikom izgradnje, kao jedan od tih problema izdvajamo pojavu čvrste stenske mase prilikom otkopavanja na lokacijama izgradnje budućih objekata predviđenih građevinskim projektom. Prilikom izgradnje objekata tj. dela objekta koji podrazumeva podzemne prostorije nekog objekta, potrebno je vršiti iskop materijala na lokaciji, međutim taj materijal ...
    urbana sredina, iskopavanje, ekspanzione smeše, kontrolisano miniranje, izgradnja

  • Blasting mats for the protection of people, structures and the environment in proximity to the blast site

    Milanka Negovanović, Lazar Kričak, Stefan Milanović, Jovan Marković, Nikola Simić, Snežana Ignjatović (2023)
    Енергија експлозије која се ослобађа током процеса детонације минских пуњења у бушотинама користи се за дробљење чврсте стенске масе на комаде различитих облика и величина, у зависности од карактеристика стене и оптимизације параметара бушења и минирања. Поред позитивних ефеката минирања, постоје и одређени нежељени ефекти сваког процеса минирања који се могу јавити, а то су: потреси тла, разлетање комада одминираног материјала, ваздушни удари, загушљиви и отровни гасови и прашина. Разлетање комада је неконтролисано избацивање комада одминиране стенске масе и ...
    mecevi za miniranje, pokrivanje, razletanje komada, miniranje

  • Probabilistic analysis of anisotropic rock slope with reinforcement measures

    Zoran Berisavljević, Dušan Berisavljević, Miloš Marjanović, Svetlana Melentijević (2023)
    During the construction of E75 highway through Grdelica gorge in Serbia, a major failure occurred in the zone of reinforced rock slope. Excavation was performed in highly anisotropic Paleozoic schist rock formation. The reinforcement consisted of the two rows of micropile wall with pre-stressed anchors. Forces in anchors were monitored with load cells while benchmarks were installed for superficial displacement measurements. The aim of the study is to investigate possible causes of instability considering different probability distributions of the ...
    povratna analiza, tehnika optimizacije, verovatnoća loma, anizotropija čvrstoće

  • Rift sequence stratigraphy and its contribution to source rock understanding – Serbian part of Pannonian Basin

    Filip Anđelković, Dejan Radivojević (2018)
    ... and its contribution to source rock understanding – Serbian part of Pannonian Basin Filip Anđelković, Dejan Radivojević Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Rift sequence stratigraphy and its contribution to source rock understanding – Serbian part ...
    ... XXI International Congress of the CBGA, Salzburg, Austria, September 10–13, 2018, Abstracts Rift sequence stratigraphy and its contribution to source rock understanding – Serbian part of Pannonian Basin Filip Anđelković, Dejan Radivojević University of Belgrade, Faculty of Mining and Geology, Department ...
    ... to the biggest oil and gas fields in Serbia (Ivanišević and Radivojević, 2018; Radivojević and Rundić, 2016) one can conclude that the main source rock is of Pannonian age. Those rocks correspond to the Endrőd formation hemipelagic marls, one of the source rocks at the largest hydrocarbon field in ...

  • Paleomagnetisam of Tertiaty igneous rocks from the Varda Zone. New Trends in Geomagnetism: Paleo, Rock and Environmental Magnetisam

    Lesić Vesna, Márton Emo, Cvetkov Vesna, Tomić Dragana (2010)

  • Influence of rock mass blastability on explosive energy distribution

    Mitrović Stojan, Kričak Lazar, Negovanović Milanka, Janković Ivan, Zeković Dario (2009)

  • Basic kinematic analysis of rock slope using terrestrial 3D laser scanning on the M-22 highroad pilot site

    Marjanović Miloš, Abolmasov Biljana, Đurić Uroš, Zečević Snežana, Šušić Vladimir (2013)

  • 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, ...
    ... point (m); 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 ...
    ... Conclusions To 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, is the equation of M. A. Sadovskii that is used ...

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

    Miloš Gligorić, Jelena Majstorović, Suzana Lutovac (2018)
    ... , Suzana Lutovac1 Received: May 11, 2018 Accepted: June 15, 2018 Abstract: Almost all of rock masses are more or less anisotropic medium. Foliation, layering, cracking and cleavage are some of the rock attributes that indicate to anisotropy presence. Due to the existence of these discontinuities ...
    ... quantitative indicators of anisotropy; interval numbers 1 INTRODUCTION Anisotropy is the property of rock sample showing different physical characteristics along different directions. Rock masses anisotropy is especially manifested on their following properties: mechanical resistance, elasticity ...
    ... The benefits of using ultrasonic in rock mass investigations are numerous and become necessary part of testing program more and more. This is especially significantly due to the fact that ultrasonic investigation is the way of testing without fracture of rock samples. Measuring longitudinal ...

  • Rock breakage by explosives

    Torbica Slavko, Lapčević Veljko (2014)

  • Rock fracturing mechanisms by blasting

    Torbica Slavko, Lapčević Veljko (2018)

  • Applying Terrestrial Laser Scanning Technology on Rock Slope-A Case Study

    Abolmasov Biljana, Šušić Vladimir, Zečević Snežana (2011)

  • Development of dynamic phenomena in the rock mass

    Ljubojev Milenko, Popović Ratomir, Rakić Dragoslav (2011)