Претрага

Упит dcterms_subject_txt:underground exploitation

218 items

  • Advantages and challenges in presenting mathematical content using EDX platform

    Marija Radojičić, Ivan Obradović, Ranka Stanković, Olivera Kitanović, Roberto Linzalone (2016)
    ... CONTENT USING EDX-BAEKTEL PLATFORM Over the last few years, mathematical content on the web is increasing, which means that production and exploitation of mathematical content using information technology (IT) is in progress [6]. Experts stress the importance of using TPACK framework (Image ...

  • The Importance of Geotechnical Investigations for the Construction of Transfer Station „Prelići“ on Landfill in Cacak – Serbia

    Dragoslav Rakić, Irena Basarić, Jovana Janković, Tina Đurić (2019)
    For the purpose of the facilities construction within the transfer station „Prelici“ in Cacak, specific geotechnical investigations were carried out based on which the technological project with the facilities schedule was developed. Significant deviations in relation to the presented results were determined during earthworks, so the additional geotechnical investigation works were carried out. Since the new investigation works have determined a different cross section of the terrain, it was proposed to move the planned facilities which led to the ...
    landfill, geotechnical investigations, transfer station
    ... the costs of preparing the terrain often exceed the costs of establishing a recycling yard, i.e. transfer station, • increasing investment and exploitation costs for equipment and labor. 3. PRESENTATION OF TRANSFER STATION „PRELICI“ WITH SELECTION AND RECYCLING CENTER As a part of the transfer ...

  • 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)
    ... pit Kovilovača Measurements of seismic shocks in the open pit Kovilovača were performed during blasting, conducted for the purpose of deposit exploitation [9]. Two blasting operations were performed. Balkanit 60/1500, detonex 65/1500 and ANFO 70/1500 were used as explosives. Activation of explosives ...

  • Synergy between the mineral deposit exploration and geothermal resources assessment on the example of "Valjevo" boron and lithium deposit in Serbia

    Nebojša Atanacković, Vladimir Živanović, Ana Vranješ, Sava Magazinović, Marinko Toljić, Ana Arifović, Branislav Potić (2023)
    Exploration of mineral deposits involves a collection of vast data sets on geological characteristics of the area. These data can largely contribute to the assessment of the geothermal potential, which can lead to an increase in the share of geothermal resources in the energy mix of the extractive industry and the local community. On the example of the "Valjevo" B-Li deposit, data on structural settings and previous hydrogeological investigations were combined with the results of resource drilling and geophysical ...
    Geothermal assessment, Mineral deposit exploration, Geothermal potential, Serbia
    ... [1]. Geological settings where mineral deposits and geothermal resources are co-located create opportunities for developing more sustainable exploitation scenarios by substituting the fossil fuels energy systems in the industry and the local community [2]. The "Valjevo" boron and lithium prospect ...

  • Nelinearno dinamičko modelovanje potresa izazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija

    Srđan D. Kostić (2013-11-04)
    U ovoj disertaciji, cilj istraživanja bio je određivanje dinamičkih svojstava potresaizazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija.Analiza potresa izvedena je sa dva aspekta – u prvom delu istraživanja izučavane suvremenske serije oscilovanja tla za vreme potresa, a u drugom delu vršena je analizastabilnosti fenomenološkog Baridž-Knopof modela bloka sa oprugom. Vremenske serijeoscilovanja tla proučavane su primenom postupka analize surogat podataka, kao ikorišćenjem metoda analize nelinearnih vremenskih serija (primena teoreme orazvijanju skalarne vremenske serije). Analiza vremenskih serija izvedena je ...
    potres, naponsko stanje, podzemne prostorije, bifurkacije, vremenskaserija, deterministički haos, stohastičnost, perturbacije, vremensko kašnjenje, jačina trenja
    ... STRESS CHANGE DUE TO EXCAVATION OF HORIZONTAL UNDERGROUND CHAMBERS ABSTRACT In this dissertation, the aim of the research was to determine the dynamics of seismic events induced by the stress change due to excavation of horizontal underground chambers. The conducted analysis was twofold ...
    ... izradi horizontalnih podzemnih prostorija;Nonlinear dynamical modeling of seismic events induced by stress change due to excavation of horizontal underground chambers Srđan D. Kostić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Nelinearno dinamičko modelovanje ...
    ... izradi horizontalnih podzemnih prostorija;Nonlinear dynamical modeling of seismic events induced by stress change due to excavation of horizontal underground chambers | Srđan D. Kostić | Универзитет у Београду | 2013-11-04 | | http://dr.rgf.bg.ac.rs/s/repo/item/0003939 Дигитални репозиторијум Рударс ...

  • Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention

    Milica Ješić, Bojan Martinović, Stefan Stančić, Miroslav Crnogorac, Dušan Danilović (2023)
    Gas wells, particularly those situated onshore, play a vital role in the global energy sector by supplying a significant portion of natural gas. However, operational challenges, notably gas hydrate formation, pose substantial issues, leading to complications such as flowline blockages and unexpected well shutdowns. Gas hydrates, crystalline structures resembling ice, ...
    Gas Well, Gas Hydrate Formation, Well Modeling, Well Performance Optimization, Choke Position Adjustments, Methanol Injection

  • Novel Hybrid MPSI–MARA Decision-Making Model for Support System Selection in an Underground Mine

    Miloš Gligorić, Zoran Gligorić, Suzana Lutovac, Milanka Negovanović, Zlatko Langović (2022)
    objektivne težine kriterijuma, MPSI metoda, višekriterijumsko odlučivanje, MARA metoda, izbor sistema podgrade, podzemna eksploatacija

  • Formative evaluation of e-learning projects with the logical framework approach

    Roberto Linzalone, Giovani Schiuma, Ivan Obradović, Ranka Stanković (2015)
    ... outputs, purposes / objectives), functions (social, technical, economic, environmental, etc.) that trigger the changes (assumptions), and the exploitation of the causal links, through a graphical-textual model that takes the form of a Matrix (Logical Framework Matrix). According to the Logical ...

  • Electronic Dictionaries - from File System to lemon Based Lexical Database

    Ranka Stanković, Cvetana Krstev, Biljana Lazić, Mihailo Škorić (2018)
    In this paper we discuss some well-known morphological descriptions used in various projects and applications (most notably MULTEXT-East and Unitex) and illustrate the encountered problems on Serbian. We have spotted four groups of problems: the lack of a value for an existing category, the lack of a category, the interdependence of values and categories lacking some description, and the lack of a support for some types of categories. At the same time, various descriptions often describe exactly the same ...
    ... functional and reusable electronic lexical databases. LeX- imir provided for export of e-dictionaries to XML files compliant to LMF model, but further exploitation of these files was not implemented, neither for lexical database development nor for further processing (Stanković et al., 2013). Finally we ...
    ... istencies were detected and resolved. However, the final evaluation report will be given once the application is fully developed and database exploitation stars. Given that language resources for more than 22 languages, cur- rently distributed with Unitex/GramLab, were developed in the same DELA ...

  • Application of stochastic models for mine planning and coal quality control

    Dejan Stevanović, Božo Kolonja, Ranka Stanković, Dinko Knežević, Mirjana Banković (2014)
    ... g. S %) and the variability of the outgoing coal from pile [11]: HE n n� � s s in out where is the number of layers05. , (5) By grouping exploitation mining blocks and forming a pile, the average grade of this pile is closer to the planned mean if compared to the grades of each individual block ...
    ... pile (e. g. S %) and the variability of the outgoing coal from pile [11]: HE =2it_ = 05Vn, where n is the number of layers (5) oO out By grouping exploitation mining blocks and forming a pile, the average grade of this pile is closer to the planned mean if compared to the grades of each individual block ...

  • Development of terminological resources for expert knowledge: a case study in mining

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Aleksandar Cvjetić (2015)

  • A Tel Platform Blending Academic And Entrepreneurial Knowledge

    Ivan Obradović, Ranka Stanković, Jelena Prodanović, Olivera Kitanović (2013)
    ... hardware and software infrastructure must operate flawlessly. In brief, a lot of work still needs to be done before BAEKTEL enters full exploitation to the benefit of future and current university students, as well as university graduates working in enterprises. LITERATURE [1] Longworth ...

  • Heavy metals in lignite and soil of Kostolac-Kovin coal basin, eastern Serbia - comparative analysis with selected cities in Serbia, region, Europe and world

    Bogoljub Vučković, Bojan Dimitrijević (2023)
    The Kostolac-Kovin coal basin with an area of 320 km2, with 5 separate layers of coal and with a total of about 5.7 Bt of geological resources and reserves represents an exceptional potential for coal production in Serbia. The coal resources listed in this way are not fully exploitable, but they represent potential for consideration. In this paper, we deal with the geochemical characteristics of coal seams and perform a comparative analysis of coal affectation on the environment. With ...
    lignite, heavy metals, concentrations
    ... in the underground pits of Stari Kostolac and Ćirikovac, after that in the surface mines of Klenovnik and Cirikovac, picture 2) and are not being excavated now; 177 2. Now in the excavation phase are some parts of 1, II and III layers (I and II layers in Kovin by underwater exploitation; II and ...

  • 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

  • SASA Dictionary as the Gold Standard for Good Dictionary Examples for Serbian

    Ranka Stanković, Branislava Šandrih, Rada Stijović, Cvetana Krstev, Duško Vitas, Aleksandra Marković (2019)
    У овом раду представљамо модел за избор добрих примера за речник српског језика и развој иницијалних компоненти модела. Метода која се користи заснива се на детаљној анализи различитих лексичких и синтактичких карактеристика у корпусу састављених од примера из пет дигитализованих свезака речника САНУ. Почетни скуп функција био је инспирисан сличним приступом и за друге језике. Дистрибуција карактеристика примера из овог корпуса упоређује се са карактеристиком дистрибуције узорака реченица ексцерпираних из корпуса који садрже различите текстове. Анализа је показала да ...
    Српски, добри примери из речника, аутоматизација израде речника, издвајање својстава, Машинско учење
    ... Serbian. In order to represent domain knowledge, two scientific journals (labelled SJ) were used: The Journal for Digital Humanities Infotheca10 and Underground Mining Engineering11. The sample labelled DP, with 17 issues of the daily 8 http://jerteh ...
    ... there have been several initiatives for its modernization and acceleration. Digitization of the published volumes began in 2016, and the first exploitation of two digitized volumes was reported in Stijović and Stanković (2017). Dictionary entries from five volumes were automatically parsed and stored ...
    ... selections of parameters and features to be calculated will be enabled. Full system integration will combine the use of a lexical database with corpora exploitation via the developed web service and software. Since the work on digitization of other volumes of the SASA dictionary is continuing, more data 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)
    ... not entirely homogeneous in composition. Limestones are the most important lithological members from both economic aspect and aspect of mining exploitation technology. Physical and mechanical properties of limestone in the deposit are spatially very uneven. Examination of physical and mechanical properties ...
    ... 08%–0.23% 4.2.2. Blasting Method Measurements of seismic shocks at the Nepričava open pit were performed during blasting, conducted for deposit exploitation [18]. Three blasting operations were performed. Balkanit 60/1000 and Videksil 65/2000 (Videks Company, Sofia, Bulgaria) were used as explosive ...

  • Characterization and Environmental Evaluation of Recycled Aggregates from Construction and Demolition Waste in Belgrade City Area (Serbia)

    Filip Abramović, Miroslav Popović, Vladimir Simić, Vesna Matović, Radmila Šerović (2024)
    General Materials Science

  • Bilingual lexical extraction based on word alignment for improving corpus search

    Jelena Andonovski, Branislava Šandrih, Olivera Kitanović (2019)
    Library and Information Sciences,Computer Science Applications

  • LRMI markup of OER content within the BAEKTEL project

    Ranka Stanković, Daniela Carlucci, Olivera Kitanović, Nikola Vulović, Bojan Zlatić (2015)
    ... create applications that make use of big data about resources. However, a lot of work still needs to be done before BAEKTEL enters full exploitation to the benefit of future and current university students, as well as university graduates working in enterprises. Namely, the population of ...

  • Approach to operational mine planning: Case study Tamnava West

    Dejan Stevanović, Mirjana Banković, Milica Pešić Georgiadis, Ranka Stanković (2014)
    ... Minex covers almost every part of geological modeling and mine planning process. It provides a fast and powerful set of modules for surface or underground mines, long or short term planning. Developing of technological model for operational planning and coal quality control in Minex for the Tamnava ...
    ... characterized by continuous worsening of production conditions. This is particularly evident when considering the fact that the deposits on which exploitation is carried out are often, small in size, with poor quality and with complex structure and geometry, often in locations that have unfavorable ...