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Упит dcterms_subject_txt:rock breakage by explosives

1113 items

  • Improving efficiency of thermal power plants through mine coal quality planning and control

    Mirjana Banković, Dejan Stevanović, Milica Pešić, Aleksandra Tomašević, Ljiljana Kolonja (2018)
    Главни циљ контроле квалитета угља у рудницима лигнита је снабдевање термоелектрана угљем чији квалитет мора да се креће унутар одређених квалитативних ограничења. Карактеристике угља могу да утичу на ефикасност, поузданост и расположивост како котла тако и јединица за контролу емисије. У овом раду аутори су презентовали интегрисану симулацију рударског процеса као нови приступ у истраживању променљивости калоричне вредности угља приликом експлоатације комплексног лежишта лигнита. Резултати таквог приступа омогућавају драгоцен увид у перформансе континуалног рударског система у смислу контроле променљивости ...
    mine planning, variability of coal quality, simulation, coal blending

  • Effects of Energy Production and Consumption on Air Pollution in Serbia

    Marija Živković (2019)
    Energy production and combustion, mostly from unregulated or inefficient fuel combustion, are the single most important anthropogenic sources of air pollutant emissions. Energy sector in Serbia is highly fossil fuel intensive: 87.88% of energy consumed in Serbia is related to fossil fuels, while almost 95% of energy sources are combusted. In 2017. energy related carbon dioxide emission in Serbia is was 47.95 million tones. The main source of carbon dioxide emission was coal, responsible for almost 70% of energy ...
    energy related emissions, Serbia
    ... great number of uncontrolled or poorly controlled combustion processes. 2.ENERGY CONSUMPTION AND PRODUCTION IN SERBIA Data on energy consumption: by fuel and by activity are the bases for determination of pollutants emissions. For the case of Serbia data can be found in energy balances of the country 7 ...
    ... thermal power plants or CHPs. Structure of electricity generation by source is presented in Figure 3. In average about ¾ of electricity in Serbia is generated in TPPs, with average efficiency of 34.2% 8. Figure 3. Electricity generation by source Final energy consumption in Serbia in 2017 was 365047 TJ ...
    ... the Figures 4.1.a and 4.1.b. a) b) Figure 4. Final energy consumption a) by sector b) by fuel Households and public and commercial sector (the buildings sector) account 44.45% of final energy consumption, so they need to receive special ...

  • Analysis Of the Process Of Carbon Capture Utilization And Storage In Underground Reservoirs

    John Nyame (2024)
    The importance of mitigating the effects of global climate change has necessitated an in-depth exploration of innovative strategies to reduce carbon dioxide (CO2) emissions. Among these strategies, Carbon Capture, Utilization, and Storage (CCUS) has emerged as a promising and transformative solution. This master thesis delves into the diverse realm of CCUS processes, aiming to unravel the positives challenges, and opportunities within this dynamic field. The analysis begins with a systematic examination of carbon capture technologies, encompassing post-combustion, pre-combustion, and oxy-fuel combustion ...
    Carbon Capture, Utilization and Storage
    ... reservoir. Heterogeneity with rock and fluid properties between formation and drilled wells reduces the effective performance of CO» flooding. EOR currently contributes to only 3 % of CO- utilization. [20] Although advances in this field have been retarded by the price of CO, its use is steadily ...
    ... (CC BY) AyropcTBo — HekoMepiujazmHo (CC BY-NC) AyTopcTBo — HeKoMocpiHjazHo — 6e3 ripepanta (CC BY-NC-ND) AyTOpcTBO — HeEKOMCPIIHJAJIHO — JIeJTIHTH HOJI HCTHM yCJIOBHMa (CC BY-NC-SA) Ayropcrno – 0e3 npepajta (CC BY-ND) P A 0 G A i AyTOpcTBO — eJIHTH HOJI HCTHM yCJIOBHMa (CC BY-SA) ...
    ... injected CO2 will dissolve into the saline fluid that is present in the pore spaces within the rock and mineral trapping: where dissolved CO- in the saline fluid reacts with the minerals in the rock. Mineral trapping is deemed the most secure form of CO» storage however it is a slow process and ...

  • Tectonic evolution of the Circum-Moesian orocline of the Carpatho-Balkanides: Paleomagnetic constraints

    Emő Márton, Vesna Cvetkov, Miodrag Banješević, Gábor Imre, Aleksandar Pačevski (2024)
    Apuseni-Banat-Timok-Srednogorie belt, danubicum, paleomagnetism, oroclinal bending

  • Stratigraphy and microfossils (radiolarians and planktonic foraminifers) of the Upper Cretaceous (upper Santonian–lower Campanian) Struganik limestone (Western Serbia)

    Liubov G. Bragina, Nikita Yu. Bragin, Ludmila F. Kopayevich, Nevenka Đerić, Nataša Gerzina Spajić (2019)
    Paleontology, Stratigraphy, Ecology, Evolution, Behavior and Systematics

  • Investigation of Co0.9Ho0.1MoO4 Nanopowders Obtained by Glycine Nitrate Procedure

    Milena Rosić, Maja Milošević, Maria Čebela, Vladimir Dodevski, Vesna Lojpur, Radomir Ljupković, Aleksandra Zarubica (2023)
    ... Obtained by Glycine Nitrate Procedure Milena Rosić, Maja Milošević, Maria Čebela, Vladimir Dodevski, Vesna Lojpur, Radomir Ljupković, Aleksandra Zarubica Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Investigation of Co0.9Ho0.1MoO4 Nanopowders Obtained by Glycine ...
    ... Fišegradska 33, 18000 Niš, Serbia *mrosic(ovinca.rs Nanometric size CoooHooiMoO+ powder particles were obtained by applying glycine nitrate procedure (GNP). Powder properties have been studied by DTA, X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra, Spectroscopy, Field emission scanning ...
    ... Keywords: Alkali activated materials, kaolin, fly ash, XPS, HR-TEM, natural radioactivity ICTM P-3 Investigation of CoooHoo. MoOu Nanopowders Obtained by Glycine Nitrate Procedure M. Rosić" , M. Milošević?, M. Čebela", V. Dodevski", V. Lojpur*, R. Ljupkovićiand A. Zarubicad “ Laboratory for Material ...

  • Critical disorder and critical magnetic field of the nonequilibrium athermal random-field Ising model in thin systems

    Svetislav Mijatović, Dragutin Jovković, Sanja Janićević, Đorđe Spasojević (2019)
    Изингов модел, критично понашање, танки системи

  • State and perspective of individual household heating in Serbia: A survey-based study

    Boban Pavlović, Dejan Ivezić, Marija Živković (2021)
    This paper presents the results of the household survey on individual household heating systems in Serbia. The survey was conducted in the period October to December 2020 with the participation of 1100 households with individual household heating systems. The information collected in the questionnaire can be separated into three main parts: basic household data, current heating system characteristics, and households’ perceptions and attitudes. The survey results provide unique and comprehensive information concerning individual household heating systems and the main ...
    Domaćinstva, Individualni sistemi grejanja, Korišćenje energije, Stavovi potrošača, Anketa, Srbija

  • A survey of greenhouse gases production in central European lignites

    Anna Pytlak, Anna Szafranek-Nakonieczna, Weronika Goraj, Izabela Śnieżyńska, Aleksandra Krążała, Artur Banach, Ivica Ristović, Mirosław Słowakiewicz, Zofia Stępniewska (2021)
    Lignit, Gasovi sa efektom staklene bašte, Ugljen dioksid, Metan, Azotni oksid
    ... gases released by xylitic lignite was lowest among the samples. Preferen- tial extraction of the detritic lignites is suggested as ameans to reduce GHG emissions from the abandoned lignite mines. © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license ...
    ... https://doi.org/10.1016/j.scitotenv.2021.149551 0048-9697/© 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Contents lists available at ScienceDirect Science of the Total Environment j ...
    ... methanol, and methylated compounds. Methanogenesis is in fact a multistage process in which exact CH4 formation by methanogenic Archaea is preceded by the degradation of complex organic molecules by a consortium of vari- ous microorganisms, mostly bacteria. Degradation of the lignin-derived xylites could ...

  • Preliminary regional landslide susceptibility assessment using limited data

    Igor Peshevski, Milorad Jovanovski, Biljana Abolmasov, Jovan Papic, Uroš Đurić, Miloš Marjanović, Ubydul Haque, Natasha Nedelkovska (2019)
    In this paper a heuristic approach for preliminary regional landslide susceptibility assessment using limited amount of data is presented. It is called arbitrary polynomial method and takes into account 5 landslide conditioning parameters: lithology, slope inclination, average annual rainfall, land use and maximum expected seismic intensity. According to the method, in the first stage, a gradation is performed for each of the carefully selected conditioning parameters by assigning so called rating points to the grid cells on which the ...
    klizišta, podložnost
    ... accompanied by 167 km of service roads. In a geological context, the study area belongs to a larger re- gional tectonic unit called the Western Macedonian Zone (WMZ). In this unit rock masses from the Palaeozoic, Mesozoic, Pliocene and Quaternary periods are represented. Igneous rock masses include ...
    ... Rockfalls are usually classified as shallow slides. Almost 70% of the re- ported landslides in Macedonia have been caused by heavy rain- fall (PESHEVSKI, 2013). Due to rock falls and debris flows, there have even been several fatalities (PESHEVSKI et al., 2015b; HAQUE et al., 2016; PESHEVSKI et ...
    ... in the modelling have by far the greatest impact in any particular landslide susceptibility method. In practice vari- ous conditioning parameters are in use when performing land- slide susceptibility or hazard zoning: lithology, engineering-geo- logical characteristics of the rock masses, DEM derivatives ...

  • Groundwater resources for drinking water supply in Serbia´s Southeast Pannonian basin

    Dušan Polomčić, Bojan Hajdin, Marina Ćuk, Petar Papić, Zoran Stevanović (2014)
    menadžment podzemnih voda, monitoring, kvalitet podzemnih voda, bilans, baza podataka

  • An Integrated Environment for Management and Exploitation of Linguistic Resources

    Ranka Stanković, Ivan Obradović (2009)
    ... the ratio of relevant documents obtained by the query to the total number of available relevant docu- ments in the textual resources being searched. At first glance, this problem could easily be solved by expanding the query, namely by adding the words the user failed to use ...
    ... connects these forms by logical “or” relations. In the same way the user chooses whether he/she wants the query to be in Cyrillic or Latin alphabet, or in both, by selecting the corresponding checkboxes. WS4QE realizes semantic expansion of a query using SWN, namely, by selecting all synsets ...
    ... subsequently emerged, based on WS4LR, followed by corresponding web services. Its goal was to make some of the functions related to the develop- ment and use of linguistic resources available on the web as well. As the majority of functions preformed by WS4LR and WS4QE overlap, in this section ...

  • Application of Lignite Combustion Waste Slag Generated in Heating Plants as a Partial Replacement for Cement. Part II: Physical–Mechanical and Physical–Chemical Characterization of Mortar and Concrete

    Milan Kragović, Nenad Ristić , Jelena Gulicovski, Andrijana Nedeljković, Snežana Pašalić, Ivica Ristović, Marija Stojmenović (2021)
    sagorevanje lignita, otpadna šljaka, zamena cementa, proizvodnja maltera i betona, fizičko-mehanička i fizičko-hemijska karakterizacija
    ... affil- iations. Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/). 1 “Vinča” Institute of ...
    ... affil- iations. Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by / 4.0/). , Nenad Risti¢ 7, Jelena Gulicovski ...
    ... loss of ignition, may be overcome by the thermal treatment of the slag prior to use, up to 650 ◦C. Results also showed that other physical– chemical characteristics of slag (crystal, structural, and textural properties) completely satisfied the criteria prescribed by the standard EN 450-1:2012. The p ...

  • Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal

    Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović (2021)
    Polimeri i plastika, opšta hemija
    ... Initial pre-extracted lignite; HDPE; and solid residues obtained by pyrolysis of lignite, HDPE, and their mixtures (Section 2.4.) were characterized by Rock-Eval and elemental analysis. Rock-Eval pyrolysis [48] was performed using TOC/Rock-Eval-6 apparatus (Vinci Technologies, Nanterre, France). The sample ...
    ... and solid products obtained by co-pyrolysis, specific analyses (GC–MS, Rock-Eval, carbon isotope measurements) were performed on products obtained at 400, 450, and 500 ◦C. Polymers 2021, 13, 759 10 of 25 3.3. Rock Eval Data and Elemental Analysis The results of Rock-Eval pyrolysis comprising S1 ...
    ... and 600 ◦C. Initial substrates and pyrolysis products were characterized by thermogravimetric analysis (TGA), gas chromatography–mass spectrometry (GC–MS), specific carbon isotope analysis of individual hydrocarbons (δ13C), Rock-Eval pyrolysis, and elemental analysis. The positive synergetic effect during ...

  • Quantitative landslide risk assessment in the city of Tuzla

    Miloš Marjanović, Biljana Abolmasov, Cvjetko Sandić, Miralem Mulać, Petar Begović (2021)
    In the climate-changing conditions, geological environment interacts more dramatically with the urban fabric than before. The urbanization is expansive and more aggressive than before, but so are the weather extremes and long-term climate trends. In effect, many processes which can be triggered by either side, nature or engineering, are becoming more pervasive than before, and such is the case with landslides. Dealing and managing landslides requires few crucial steps, starting from collecting data on landslide location and typology – ...
    "landslides", "risk assessment"
    ... and Doboj” funded by UNDP Office in Bosnia and Herzegovina and implemented by HEIS Sarajevo, URBIS Banja Luka and IBIS Engineering, Banja Luka. We are very grateful to Mrs. Aida Hadžič Hurem for her great support. This research results are part of the Project TR36009 funded by the Ministry of Education ...
    ... papers published under the Auspices of the ISSMGE and maintained by the Innovation and Development Committee of ISSMGE. The paper was published in the proceedings of the 13th International Symposium on Landslides and was edited by Miguel Angel Cabrera, Luis Felipe Prada-Sarmiento and Juan Montero ...
    ... can be violent from both sides. For instance, the fragile balance of the natural slopes is undermined by slope cuts and de-vegetation for infrastructure and construction, which is compensated by intensifying erosional and landslide processes, subsidence etc. On top of that, unstable or extreme weather ...

  • Spatial assessment of the areas sensitive to degradation in the rural area of the municipality Čukarica

    Natalija Momirović, Ratko Kadović, Veljko Perović, Miloš Marjanović, Aleksandar Baumgertel (2019)
    Nature and Landscape Conservation, Soil Science, Agronomy and Crop Science, Water Science and Technology

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

    Nikola Stanković, Vesna Cvetkov, Vladica Cvetković (2024)

  • An Approach to Development of Bilingual Lexical Resources

    Stanković Ranka, Obradović Ivan, Trtovac Aleksandra (2012)
    ... system uses other BCI’12, September 16–20, 2012, Novi Sad, Serbia. Copyright © 2012 by the paper’s authors. Copying permitted only for private and academic purposes. This volume is published and copyrighted by its editors. Local Proceedings also appeared in ISBN 978-86-7031-200-5, Faculty of Sciences ...
    ... query for further morphological and semantic expansion, This is essentially handled by a web service (wsQueryExpand.asmx), which is part of the LeXimir software package, a multipurpose tool also developed by the HLT Group [Stanković et al., 2011]. The web service invokes LeXimir’s function library ...
    ... had to be used on an “as is” basis. But even the development of SrpWN is restricted to a certain extent by the fact that Serbian synsets have to be linked to corresponding English synsets by the interlingual index (ILI) [Tufiş, 2004]. Another reason is the assessment that a bilingual resource in ...

  • Improvement of geodatabase queries within GeolISS

    Ranka Stanković (2008)
    ... present the results of all these operations. Data modeling is inspired by different geological models [1], [2], interchange schemes [3], and standards proposed by ISO TC211 [4]. The design is also significantly influenced by the Ontology Web Language (OWL). GeolISS is implemented using ESRI ArcGIS ...
    ... resource handled by WS4LR is the Serbian wordnet [11]. A wordnet is composed of synsets, or sets of synonymous words representing a concept, with basic semantic relations between them forming a semantic network. Each synset word or “literal” is denoted by a “literal string” followed by a “sense tag” ...
    ... in view of the diversity and amount of archived data, which is of paramount importance for the quality of results obtained by the query, can be substantially improved by using various lexical resources, such as morphological dictionaries and a geological dictionary. These lexical resources used ...

  • Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering

    Josip Išek, Lazar Kaluđerović, Nikola Vuković, Maja Milošević, Ivana Vukašinović, Zorica Tomić (2020)
    γ-spectrometry, brushite, chukhrovite, phosphogypsum, radionuclides, recrystallization
    ... originating from the parent phosphate rock, as well as being precipitated by acid digestion of natural silicates and aluminosilicates. A relatively sig- nificant amount of phosphorus in raw phosphogypsum is present in the form of brushite, as was confirmed by XRD patterns (Roode & Strydom, 1999) ...
    ... Th in raw materials and by-products. Jourmal of Radioanalytical and Nuclear Chemistry, 311(2), 1163–1168. Jung Y., Lim J.M., Ji Y.Y., Chung K.H. & Kang M.J. (2017) The transport char- acteristics of _*U, Th, ' Ra, and “K in the production cycle of phos- phate rock. Journal of Radiation Protection ...
    ... knowledge of the phosphoric acid production process, the most significant impurities identified in raw phosphogypsum were detrital quartz (by volume), RaSO, (by radioactivity) and ferric oxyhydroxides affecting the colour (e.g. Pćrez-Lopez et al, 2016; Jung et al., 2017). As all of these components ...