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Упит dcterms_subject_txt:slabomagnetični minerali

475 items

  • Fragmentation Size Prediction of Blasted Material Using a Specialized Software for Drilling and Blasting

    Stefan Milanović, Nikola Simić, Lazar Kričak, Milanka Negovanović, Nikola Đokić, Miljan Gomilanović (2024)
    Design and optimizing the drilling and blasting parameters, should fill the requirements for the capacity, fragmentation size, and technical characteristics of loading and transport equipment, and enable a safe work at the open pit. Besides mentioned, it also achieves the minimal impact on the environment of the open pit and decreases the negative effects on the environment, especially in the blast vibration and flyrock. To obtain the best possible blasting effects and consider all the factors, a specialized software is ...
    optimization, O-Pitblast, drilling, blasting, fragmentation size

  • Arsenic in Tap Water of Serbia´s South Pannonian Basin and Arsenic Risk Assessment

    Petar Papić, Marina Ćuk, Maja Todorović, Jana Stojković, Bojan Hajdin, Nebojša Atanacković, Dušan Polomčić (2012)
    kvalitet podzemnih voda, arsen, analiza rizika, Panonski Basen
    ... researched the origin of arsenic and associated it with clay minerals. Goldberg, S. (1988) believe that arsenic can be absorbed on the surface layer of mineral clay and that in sediments with clay interbeds there is generally more arsenic than in sands and limestones [16, 17]. In most of the affected areas ...
    ... frequent causes of physicochemical non-compliance in Srem are concentra- tions of iron and manganese higher than MPC [19]. In the Srem District, the mineral content of groundwater was found to be lower than in other parts of Vojvodina. Total hardness measured from 5°dH to 17°dH. Concentrations of organic ...

  • Classification of mining waste landfills according to legislation in Serbia

    Dragana Nišić, Uroš Pantelić, Nikoleta Aleksić, Neda Nišić (2021)
    rudarski otpad, jalovina, uredba, deponija, kategorija A, klasifikacija
    ... jalovina koje sadrže opasne supstance“ (01 03 05*), „ostalih otpada iz fizičkog i hemijskog tretmana minerala za crnu metalurgiju koji sadrže opasne supstance“ i „otpada iz fizičke i hemi- jske obrade minerala za obojenu metalurgiju koji sadr- že opasne supstance“ (01 04 07*) se karakterizuju kao opasni ...

  • Underground loading-haulage equipment selection with application of topsis method with different weighting methods of criteria

    Vladimir Krivošić, Luka Crnogorac, Rade Tokalić (2024)
    The choice of adequate mining machines is one of the most complex problems in the underground exploitation of mineral raw materials. The weight of such a decision is reflected in the high prices of these machines and the occurrence of even greater costs during their use if their choice was wrongly conceived. There are numerous examples from practice in which such decisions were made solely on the basis of comparing the prices of machines, without considering any of the ...
    utovarno-transportna mehanizacija, izbor, TOPSIS, entropija, standardna devijacija, težina kriterijuma

  • Analiza obrazovnog sistema i kadrovskog potencijala Republike Srbije u oblasti rudarstva i geologije

    Dragan Ignjatović, Stevan Đenadić, Predrag Jovančić, Filip Miletić, Jovana Mitrović (2024)
    Adekvatno postavljen i kontinualno unapređivan sistem obrazovanja predstavlja jasan preduslov za razvoj pojedinca, društva i države u celini. Sistem obrazovanja u Republici Srbiji davno je postavljen, a reforme nisu do kraja sprovedene. Posebno je to izraženo u visokom obrazovanju gde reforma po bolonjskom sistemu nije do kraja sprovedena ili je negativno zloupotrebljena. Trenutno je sistem obrazovanja je pod velikim pritiskom usled oštrih zahteva tržišta rada. U ovom radu je izvršena analiza obrazovnog sistema u oblasti rudarstva i geologije u ...
    obrazovanje, rudarstvo, geologija
    ... the labor market. This paper analyzes the education system in the field of mining and geology in the Republic of Serbia. Given that mining and mineral resources are of vital importance to society, active participation from experts in the field is essential. Professionals, in addition to knowledge ...

  • 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
    ... 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 takes a ...
    ... Present in figure 3.3 is an enhanced oil recovery process. Figure 3.3 Enhanced oil recovery 3.3. Mineralization Mineralization of CO- results in mineral carbonates that are formed when CO- reacts with rocks rich in calcium and magnesium. Enhanced improvement in the carbonation kinetics can be achieved ...
    ... bicarbonate, hydrochloric acid, and bleach, is approaching the commercialization step. In another example, a pilot-scale demonstration of the mineral carbonation process based on the utilization of coal fly ash to reduce CO- emissions has been installed at a 2120 MW coal-fired power plant in ...

  • Poređenje rezultata interferometrijske analize za zemljotrese na istočnom anatolijskom rasedu od 2020. i 2023. godine

    Dragan Živković (2024)
    Ovaj rad se bavi analizom površinskih deformacija izazvanih zemljotresima u Turskoj iz 2020. i 2023. godine korišćenjem diferencijalne satelitske radarske interferometrije (DInSAR tehnike). Cilj istraživanja bio je da se kvantifikuju i uporede deformacije terena izazvane ovim seizmičkim događajima i da se razumeju mehanizmi koji stoje iza oslobađanja seizmičke energije u regionu. Analizom DInSAR snimaka, identifikovane su različite deformacije duž rasednih zona za svaki zemljotres. Dok je zemljotres iz 2020. godine (M 6,7) izazvao lokalizovane deformacije duž Istočno anatolijskog raseda, zemljotres ...
    DInSAR, Istočno anatolijski rased, Kahramanmaraški trostruki spoj

  • Terenska nastava iz geofizike: Arheološki lokaliteti na području Trstenika

    Dragana Đurić, Jelena Vukčević, Dejan Vučković, Ivana Vasiljević, Vesna Cvetkov (2020)
    geofizika, geofizička istraživanja u arheologiji, arheologija u okolini Trstenika
    ... boravku ljudi na jednom mestu (Богдановић, 2010). Elektrometrija je sprovedena na području Đurovače. Primenu ove meto- de opravdava činjenica da minerali koji sačinjavaju geološke formacije, kao i bilo koji drugi prirodni ili veštački ma- terijali koji se nalaze u ispitivanom po- luprostoru, poseduju ...

  • Arsenic in tape waters of the south Pannonian basin (Serbia) and arsenic risk assessment

    Petar Papić, Marina Ćuk, Maja Todorović, Jana Stojković, Bojan Hajdin, Nebojša Atanacković, Dušan Polomčić (2012)
    ... researched the origin of arsenic and associated it with clay minerals. Goldberg, S. (1988) believe that arsenic can be absorbed on the surface layer of mineral clay and that in sediments with clay interbeds there is generally more arsenic than in sands and limestones [16, 17]. In most of the affected areas ...
    ... frequent causes of physicochemical non-compliance in Srem are concentra- tions of iron and manganese higher than MPC [19]. In the Srem District, the mineral content of groundwater was found to be lower than in other parts of Vojvodina. Total hardness measured from 5°dH to 17°dH. Concentrations of organic ...

  • The use of biological markers in determination of origin and type of organic matter in the Tisza river sediments

    Snežana Štrbac, Gordana Gajica, Aleksandra Šajnović, Nebojša Vasić, Ksenija Stojanović, Branimir Jovančićević (2013)
    The objective of the study was to determine the origin and type of organic matter (OM) of the Tisza recent sediments along the distance of 153 km through the territory of Serbia. For this purpose group organic-geochemical parameters and biomarker compositions were used. All samples contain approximately same amount of OM, which was deposited under uniform, slightly reducing conditions. Based on the distribution of n-alkanes, the origin and type of OM could not be precisely estimated. However, n-alkane patterns ...
    sediments, Tisza River, organic matter, biomarkers, oil pollutants
    ... of biomarkers as a kind of “finger- print”, which depends on the origin, depositional environment, age, maturity, relative length of migration and mineral composition of the source and reservoir rocks.10,11 This feature of oil can be very useful in environmental chemistry for the determination of the ...
    ... kind of “fingerprint”, which in addition to maturity, depends on the origin, depositional environment, age, relative length of migration and the mineral composition of the source and reservoir rocks. Therefore, crude oils can significantly differ in values of source parameters, such as distribution ...

  • Trace elements and garnet formation in a distal skarn zone: a case study of the Rudnik deposit, Central Serbia

    Bojan Kostić, Pavle Tančić, Natalija Batoćanin (2024)
    geohemija granata, retke zemlje, fluidne inkluzije, skarnovsko ležište Rudnik

  • Polyhedral characteristics of the cosalite-type crystal structures

    Sabina Kovač, Predrag Dabić, Aleksandar Kremenović, Aleksandar Pačevski, Ljiljana Karanović, Marko V. Rodić, Martina Tribus (2019)
    kristalna struktura, kozalit, poliedarske karakteristike

  • Energetska efikasnost elektromotora na površinskim kopovima

    Snežana Aleksandrović, Ilija Jeftenić (2023)

  • Multi-Criteria Approach for Selecting Optimal Dozer Type in Open-Cast Coal Mining

    Ivan Janković, Stevan Đenadić , Dragan Ignjatović , Predrag Jovančić , Tomislav Šubaranović, Ivica Ristović (2019)
    Analitički hijererhijski proces (AHP), dozeri, eksploatacija uglja, površinski kopovi
    ... machines (bucket-wheel excavators, bucket-chain excavators, spreaders, conveyor-belt transporters, etc.) that provide an uninterrupted exploitation of mineral ores, the usage of auxiliary machinery is also necessary. The auxiliary machinery provides the possibility of using the capacities of basic machinery ...
    ... machines (bucket-wheel excavators, bucket-chain excavators, spreaders, conveyor-belt transporters, etc.) that provide an uninterrupted exploitation of mineral ores, the usage of auxiliary machinery is also necessary. The auxiliary machinery provides the possibility of using the capacities of basic machinery ...
    ... 104, 294–306. [CrossRef] 22. Sitorus, F.; Ciliers, J.J.; Brito-Parada, P.R. Multi-criteria decision making for the choice problem in mining and mineral processing: Applications and trends. Expert Syst. Appl. 2018, 121, 393–417. [CrossRef] 23. Shen, L.; Muduli, K.; Brave, A. Developing a sustainable ...

  • Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils

    Olja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov (2021)
    MICP process, kinetic study, calcite, vaterite, MALDI-TOF identification, Bacillus licheniformis, Sporosarcina pasteurii
    ... incubation. At each sample time, the pH values were measured, and the total volume of inoculated broth (100 mL) was centrifuged (10,000 rpm, 15 min). Any mineral deposits adhered to the bottle walls were removed by scraping with a sterile inoculated needle. The pellets were centrifuged to remove biomass and ...
    ... and B. subtilis, while Abdel Samad et al. [39] reported the identification of Virgibacillus sp., B. circulans, B. licheniformis, and B. cereus as mineral-forming bacterial isolates from sabkhas. 3.3. Examination of Metabolic Activities Relevant to the MICP Process Different physiological and ecological ...
    ... ; Al Disi, Z.; Mohammad Ashfaq, M.Y.; Wahib, S.M.; Zouari, N. The use of principle component analysis and MALDI-TOF MS for the differentiation of mineral forming Virgibacillus and Bacillus species isolated from sabkhas. RSC Adv. 2020, 10, 14606–14616. [CrossRef] 40. Whiffin, V.S. Microbial CaCO3 Pr ...

  • 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)
    ... gligoricorgf.bg.ac.rs, jelena.majstorovicorgf.bg.ac.rs, luka.crnogoracrgf.bg.ac.rs Abstract: In mining, explosives are primarily used to obtain mineral raw material from hard rocks. Explosive charges with hundreds of kilograms per a drillhol and blasting with dozens and even hundreds of tonnes of ...

  • Analysis and visualization of geophysical well-logging data from closely spaced boreholes

    Branislav Sretković, Ivana Vasiljević, Dimitry Sidorov - Biryukov (2024)
    Geophysical logging measurements for determining the condition of the rock mass on the dam profile and locating the predisposed directions of water circulation and loss from the reservoir were conducted in four boreholes distributed at a close distance. The survey was carried out in a typical karst terrain, which is an additional challenge for defining the geological model, especially in terms of water retention. That kind of data set provides an excellent opportunity for a new approach to analysis ...
    well-logging in karst, water loss, data correlation, data fusion
    ... ...... 78 ........................... % ........................... 90 SPATIAL AND GENETIC RELATIONSHIPS BETWEEN PORPHYRY AND EPITHERMAL MINERAL DEPOSITS IN WESTERN SREDNOGORIE, BULGARIA Stefan Pelev, Boris Krestev TeorekTonuKa, Crpykropo.toruja u ByaKanHojtoruja MAHMHOECTATLIHH HA ...

  • Mineragenija i potencijalnost karbonatnih sirovina rudnog reona Bjelopavlića (Crna Gora)

    Darko M. Božović (2016-09-28)
    Karbonatne sirovine, obzirom na geološku građu Crne Gore predstavljaju jednu od najznačajnijih nemetaličnih mineralnih sirovina. U Crnoj Gori postoje brojna leţišta karbonatnih sirovina (arhitektonsko - građevinskog i tehničko - građevinskog kamena) koja su istraţena ili su u eksploataciji, među kojima rudni reon Bjelopavlića zauzima najznačajnije mjesto.Dosadašnja istraţivanja karbonatnih sirovina na ovom području imala su, međutim, prevashodno uzak istraţivački cilj, utvrđivanje rezervi arhitektonsko - građevinskog i tehničko - građevinskog kamena određenog leţišta, ili preliminarna ispitivanja kvaliteta krečnjaka u njima, sa ...
    karbonatne mineralne sirovine, arhitektonsko - građevinski kamen, tehničko - građevinski kamen, karbonatna punila, rudni reon Bjelopavlića, potencijalnost.
    ... sadrţajima ispitivanih minerala i veoma sitnim česticama. Dobijeni rezultati (sl. 6.21 – 6.30) pokazali su da se u daleko najvećem broju slučaja od metaličnih minerala javljaju oksidi i hidroksidi gvoţđa, koji nisu razdvajani s obzirom na vrstu analize. Od ostalih metaličnih minerala utvrđeno je retko ...
    ... Osim toga, svojstva stijena koja najviše utiču na fizičko - mehanička svojstva kamena su: mineralni sastav i karakteristike minerala, sklop (prostorni raspored minerala, njihov oblik i dimenzije), stepen prorastanja zrna, stepen alterisanosti odnosno sveţina stijene, defekti u mineralnim zrnima ...
    ... utvrđeno je prisustvo neidentifikovanog Bi- minerala, što potvrđuje prethodna ispitivanja (Boţović i dr., 2015). Manje prisustvo silicije i aluminije u većini uzoraka posledica je kako semi- kvantitativne prirode analize, tako i verovatno tragova minerala glina koji se javljaju uz oksi/hidrokside ...

  • Развој геолошког терминолошког речника ГеолИССТерм

    Ranka Stanković, Branislav Trivić, Olivera Kitanović, Branislav Blagojević, Velizar Nikolić (2011)
    ... terms for the purpose of providing logically consistent description, interpretation and classification of geological units, geologic structure, mineral and hydrological resources and other geologic features in the domain of ap- plied disciplines by using geolISS. The development of the electronic ...
    ... kapilarno lebdeća voda, kapilarno podizuća voda Slobodna voda (samo taj čvor); voda u vidu leda (samo taj čvor); klasifikacija podzemnih voda na osnovu minerali- zacije (svi čvorovi ispod njega bez njega): malomine- ralizovana voda, mineralizovana voda, rasol; mineralna voda (samo prvi nivo ispod njega i ...

  • 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
    ... degradation is in accordance with the low content of OM (total organic carbon of 29.77% and hydrogen of 2.79%; Section 3.3), as well as a high content of mineral matter (ash content of 47.12%), which is relatively stable and not subjected to significant decomposition even at a temperature >800 ◦C. The TGA and ...
    ... the plastic residues morphology and prevents its melting [63]. Containing a relatively high amount of carbon (Table 3) and clay (from the lignite mineral matter [2]), the solid residues obtained by lignite/HDPE pyrolysis, in addition to direct combustion, may serve for adsorption of different pollutants ...
    ... zeolite catalysts (e.g., clinoptilolite, HZSM-5) showed a positive impact on HDPE pyrolysis [64], the certain influence of clays that prevail in lignite mineral matter [2] on thermal decomposition of HDPE cannot be excluded. Termination reactions between radicals formed from kerogen and HDPE also occur. Furthermore ...