Претрага
910 items
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Multi-Criteria Fuzzy-Stochastic Diffusion Model of Groundwater Control System Selection
When considering data and parameters in hydrogeology, there are often questions of uncertainty, vagueness, and imprecision in terms of the quantity of spatial distribution. To overcome such problems, certain data may be subjectively expressed in the form of expert judgment, whereby a heuristic approach and the use of fuzzy logic are required. In this way, decision-making criteria relating to an optimal groundwater control system do not always have a numerical value. Groundwater control scenarios (alternatives) are identified through hydrodynamic ...expert judgment, linguistic variables, fuzzy dynamic TOPSIS, hydrogeology, groundwater control system, open-cast mine, geometric Brownian motionDušan Polomčić, Zoran Gligorić, Dragoljub Bajić, Miloš Gligorić, Milanka Negovanović. "Multi-Criteria Fuzzy-Stochastic Diffusion Model of Groundwater Control System Selection" in Symmetry, MDPI AG (2019). https://doi.org/10.3390/sym11050705
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Hybrid Stochastic-Grey Model to Forecast the Behavior of Metal Price in the Mining Industry
Zoran Gligorić, Miloš Gligorić, Dževdet Halilović, Čedomir Beljić, Katarina Urošević. "Hybrid Stochastic-Grey Model to Forecast the Behavior of Metal Price in the Mining Industry" in Sustainability (2020). https://doi.org/10.3390/su12166533
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Improving efficiency of thermal power plants through mine coal quality planning and control
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 ...Mirjana Banković, Dejan Stevanović, Milica Pešić, Aleksandra Tomašević, Ljiljana Kolonja. "Improving efficiency of thermal power plants through mine coal quality planning and control" in Thermal Science, Vinča Institute of Nuclear Sciences (2018). https://doi.org/10.2298/TSCI170605209B
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Hydrogeochemical distribution of Ca and Mg in groundwater in Serbia
Petar Papić, Jovana Milosavljević, Marina Ćuk, Rastko Petrović . "Hydrogeochemical distribution of Ca and Mg in groundwater in Serbia" in Groundwater: Occurrence and Significance for Human Health, CRC Press, Balkema - Taylor & Francis Group (2014)
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Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)
A groundwater flow model was developed to simulate groundwater extraction from the public water supply source of the City of Kikinda. The hydrodynamic model includes the municipal groundwater source of Kikinda (Šumice and the Jezero Well), but also an extended area where there are groundwater sources that provide water supply to three factories: (MSK, TM and LŽT - Kikinda). Hydrodynamic modeling, based on the numerical method of finite differences will show the groundwater balance of the sources in the ...... in the extended area of the groundwater source of Šumice (August 20, 2009), at maximum capacity Figure 11. Groundwater levels in piezometer P-1 Žaba and Masarikova Well acting as an observation well, registered and calculated during the model calibration process GROUNDWATER BALANCE Assessment ...
... STEF92 Technology Ltd., Sofia, Bulgaria, pp 599-606, 2011, http://dx.doi.org/10.5593/sgem2011/s02.136 7. Polomčić, D., Stevanović, Z., Dokmanović, P., Ristić-Vakanjac, V., Hajdin, D., Milanović, S., Bajić, D., Optimization of Groundwater Supply in Serbia, Proceedings of http://dx.doi.org/10.10 ...
... Issue 3, pp 217-229 229 Ground Water, Vol. 30, No. 6, 873-884, 1992, http://dx.doi.org/10.1111/j.1745-6584.1992.tb01570.x 23. Anderson, M. P. and Woessner, W. W., Applied Groundwater Modeling: Simulation of Flow and Advective Transport, Academic Press, San Diego, CA, 381p, 1992. 24. Rehm ...Dušan Polomčić, Dragoljub Bajić, Jelena Zarić. "Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)" in Journal of Sustainable Development of Energy, Water and Environment Systems (2015). https://doi.org/10.13044/j.sdewes.2015.03.0017
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Uticaj geološke neizvesnosti u razvoju rudarskih projekata
Rudarstvo je industrija koja se nosi sa različitim vrstama neizvesnosti i rizika zbog svoje prirode i specifičnosti. Neizvesnost u rudarstvu može poticati iz različitih izvora i uticati na različite aspekte rudarskih projekata. Kao jedan od dominantnih faktora, ističe se geološka neizvesnost. Geološka neizvesnost igra ključnu ulogu u rudarstvu i može značajno uticati na procenu resursa i rezervi, planiranje eksploatacije, ekonomsku isplativost i upravljanje rizicima. Ova neizvesnost se ne može eliminisati, ali se uz primenu adekvatnih standarda i zakona može ...... NPV-a rudarskog projekta u odnosu na neizvesnost procene sadržaja 25,000,000 160 143 21,957,815 22,500,000 7_ w 20,000,000 - – P 120 17,500,000 PR a5781297 102 P 100 15,000,000 F-i i - i „ 12,500,000 7 11,321,415 LON 8 - 10,357,255 š 10,000,000 5 . L .1 “ di 79090 ı46,142 iii 7,500 ...
... 2023 UTICAJ GEOLOŠKE NEIZVESNOSTI U RAZVOJU RUDARSKIH PROJEKATA IMPACT OF GEOLOGICAL UNCERTAINTY IN THE DEVELOPMENT OF MINING PROJECTS Marković P.!, Stevanović D.?, Banković M.* Apstrakt Rudarstvo je industrija koja se nosi sa različitim vrstama ncizvesnosti i rizika zbog svoje prirode i s ...Petar Marković, Dejan Stevanović, Mirjana Banković. "Uticaj geološke neizvesnosti u razvoju rudarskih projekata" in XI Međunarodna konferencija "Ugalj i kritični minerali 2023", CCM 2023, Zlatibor, 11-14. oktobar 2023., Beograd : Jugoslovenski komitet za površinsku eksploataciju (2023)
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Synthesis, characterization and photocatalytic examination of Co0.9Ho0.1MoO4 nanopowders
Milena Rosić, Maja Milošević, Maria Čebela, Vladimir Dodevski, Vesna Lojpur, Radomir Ljupković, Aleksandra Zarubica (2023)... different positions in the KGa-l structure). A sharp intense peak near g = 2.002 is assigned to defects that are always present in the clays [3]. P-2 SYNTHESIS, CHARACTERIZATION AND PHOTOCATALYTIC EXAMINATION OF Cop„Hoo,, MOOs NANOPOWDERS Milena Rosićl, Maja Miloševićz, Maria Čebela!, Vladimir ...Milena Rosić, Maja Milošević, Maria Čebela, Vladimir Dodevski, Vesna Lojpur, Radomir Ljupković, Aleksandra Zarubica. "Synthesis, characterization and photocatalytic examination of Co0.9Ho0.1MoO4 nanopowders" in Programme and the book of abstracts 7th Conference of The Serbian Society for Ceramic Materials 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia , Beograd : Institut za multidisciplinarna istraživanja (2023)
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Laboratory testing of fly ash
Fly ash is one of the most common waste materials created by burning of coal. It is composed of smaller particles, consisting mainly of aluminosilicate glass, mullite and quartz, which are collected by electrostatic separators (filter) of gaseous products arising from the combustion of coal. This paper presents the pozzolanic properties, mechanical properties, chemical and mineral composition of fly ash obtained in the combustion process in a power plant Nikola Tesla A (PPNT A) with the addition of a ...chemical composition, fly ash, mechanical properties, mineral properties, pozzolanic properties, X-ray diffraction... (MI) Ca2MgSi2O7- Ca2Al2SiO7 2,86 Anhydrite (An) CaSO4 3,50 Cristobalite (Kr) SiO2 4,06 Hematite (He) Fe2O3 2,70 Free CaO CaO 2,40 Portlandite (P) Ca(OH)2 4,90 Gypsum (G) CaSO42H2O 7,58 Calcium (C) CaCO3 3,04 Alite (C3S) Ca3SiO5 2,78 Belite (C2S) Ca2SiO4 2,88 Tricalcium aluminate (C3A) ...
... 2,69 Brown millerite (C4AF) Ca4Al2Fe2O10 2,64 3.2.1 The sample exposed to 7 days in a humidified environment without addition of binder (TA-P-7) X-ray examination has shown that the fly ash is mainly amorphous, but there are also present crystal phase feldspar, melilite, mulit, very little ...
... addition of cement binder: a) 6%, b) 4%, c) 2% 3.2.4 The sample exposed for 28 days in a humid environment without the addition of binders (TA-P-28) A sample of the mixture of fly ash and water after 28 days of exposure was very similar to the sample after 7 days exposure. Apart from the ...Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić. "Laboratory testing of fly ash" in Tehnički vijesnik (2016). https://doi.org/10.17559/TV-20150317171035
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Utilizing sewage wastewater heat in district heating systems in Serbia: effects on sustainability
Marija Živković, Dejan Ivezić (2021)Transformation of the heating sector is recognized as being essential for ensuring reliable and afordable energy services provided with reduced consumption of energy sources and diminished impact on the environment and less import dependency. The possibility of utilizing energy sources that otherwise would be wasted needs to be considered and treated as a big advantage of district heating systems. Despite many advantages, sewage wastewater heat is still a mostly unused resource at the global level and a totally unused ...рекуперација топлоте из отпадних вода, систем даљинског грејања, топлотне пумпе, енергетске уштеде, емисија угљендиоксида, енергетска безбедност, Србија... Energy security · Serbia Nomenclature DH District heating GHG Greenhouse gases HP Heat pump f p Primary energy factor E i Energy content of input to the system of the ith energy carrier f p,i Primary energy factor of the ith energy carrier Q ext Externally supplied heat fp,ext Primary ...
... 15316-4-5 2017). Thus, the primary energy factor is calculated by: where E i [JMWh] Energy content of input to the system of the ith energy carrier, f p,i [ ∕ ] Primary energy factor of the ith energy carrier, Q ext [MWh] Externally supplied heat, fp,ext [ ∕ ] Primary energy factor of the ...
... (2018) Data overview for 2017. https:// www. topla nesrb ije. org. rs/ sr/ publi kacije. Accessed 2 Aug 2019 (In Serbian) Averfalk H, Ingvarsson P, Persson U, Gong M, Werner S (2017) Large heat pumps in Swedish district heating systems. Renew Sustain Energ Rev 79:1275–1284. https:// doi. org/ 10 ...Marija Živković, Dejan Ivezić. "Utilizing sewage wastewater heat in district heating systems in Serbia: effects on sustainability" in Clean Technologies and Environmental Policy, Springer Science and Business Media LLC (2021). https://doi.org/10.1007/s10098-021-02063-6
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Hidrogeohemijska valorizacija esencijalnih mikroelemenata mineralnih voda Srbije
Jana S. Stojković (2013-09-25)Mineralne vode još od davnina privlače pažnju ljudi i to kako u pogledu istraživanja iproučavanja, tako i u pogledu njihovog iskorišćavanja. Naročito je važno poznavanjesadržaja mikroelemenata u njima, jer su to komponente njihovog hemijskog sastavakoje ih odvajaju od tzv. „običnih“ malomineralizovanih voda.U ovom radu proučavani su odabrani esencijalni mikroelementi (fluor, bor, litijum,kalijum, stroncijum i silicijum), u mineralnim vodama Srbije, pri čemu je analiziranopreko 130 uzoraka mineralnih voda iz različitih geoloških sredina, to jest hidrogeološkihrejona. Cilj ovog istraživanja bio je ...esencijalni mikroelementi, faktori migracije, zakonomernosti rasprostranjenja, hidrogeohemijski procesi, multivarijantna statistička analiza, mineralne vode Srbije... 2 . K o ef ic ij en ti k o re la ci je 1 4 p ar am et ar a h em ij sk o g s as ta v a is p it iv an ih m in er al n ih v o d a. T p H C a M g N a K C l H C O 3 S O 4 S i F B L i S r T 1 .0 0 0 p H 0 .3 2 2 1 .0 0 0 C a -0 .3 5 0 -0 .7 0 6 ...
... opisanim uslovima) B(OH)4 ‒ pH > 10 d o b ro r as tv o rl ji v i jo n i p o li b o ra ta B3O3(OH)4 ‒, B4O5(OH)4 2‒, B5O6(OH)4 ‒, BO2 ‒, B4O7 2‒ visoke konc. B, povišena M, pH 6–11 k o m p le k sn i o b li ci BF4 ‒, BF3(OH)‒, BF2(OH) kisele vode ...
... Press. 8. Box, G. E. P. and Cox, D. R. (1964) “An analysis of transformations.” Journal of the Royal Statistical Society B 26, Pp. 211-234. 9. Brand, U., Morrison, J. O. and Campbell, I. T. (1999) “Strontium in sedimentary rocks.” In: Encyclopedia of Geochemistry, by Clare P. Marshall and Rhodes ...Jana S. Stojković. "Hidrogeohemijska valorizacija esencijalnih mikroelemenata mineralnih voda Srbije" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2013-09-25)
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Стање квалитета амбијенталног ваздуха на подручју града Панчева
Александар Маринковић (2024)Квалитет ваздуха је кључни фактор за здравље људи и очување животне средине. У овом завршном раду анализирано је стање амбијенталног ваздуха на територији града Панчева како би се сагледали извори загађења, ПЛН мониторинга и изазови у погледу квалитета ваздуха са којима се суочавају сви становници. Кроз примену савремених метода праћења, идентификовани су главни извори загађења и анализирана је дистрибуција загађујућих материја у урбаном окружењу.Праћењем концентрације загађивача као што су честице PM10, PM2.5, сумпор-диоксид (SO2), азот-диоксид (NO2) и други, ...... ja <85 Makcuanma |-uacopna 72,3 134 108 99,4 og,l | 76,6 | 89,9 95,7 119 115 101 110 KoHIIeHTpauuja <150 49 K o H u e H T p a u u j a NO , K o H u e H T p a u u j a NO , MakcuMa;nHa 24-uacoBHa KoHueHTpauMija NO, 3a 2023. ronMHy “ \I “ Average of CrapueBo « KO ?e, 30 20 ...
... ((a)- aymoamcko Mepe!be) Bpoj Hayunu epnux cranuma (MC) u 3aralyyjyha Marepuja MepHux Mecra (MM) 1. Ilapa /[ymara SO»>, BeH3eH, ToyeH, KcMJeH, NO)p, NO, NOx, Osx, CO 2. BarporacHH OM SO:>, BT, NO»>, NO, NOx, NHx, H»S, PMno, PM:5, PMuio 3. Bojnonana SO, BeHnegH, TonyegH, KcHeg, PMio 4. CrapueBo ...
... 2023. ronWMHy 250 200 150 100 M — Average of BaTporacHM nOM ——— Average of I || II II BojnoBMua —— Average of Ulapa K o H u e H T p a u y u j a PM y, u e c r M u a jaH eG mapranpMn Maj jyH OMT HOB mneu A\yulaHa MECELLI/I Average of CrapueBo Cnnuka 8.1.1 Makcuannia 24-uacoeHa ...Александар Маринковић. Стање квалитета амбијенталног ваздуха на подручју града Панчева, 2024
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GIS Application Improvement with Multilingual Lexical and Terminological Resources
... Geologic Map Database, in Soller, David R., ed., Digital Mapping Techniques ‘03—Workshop Proceedings, U. S. Geological Survey Open-File Report 03-471, p. 157-167. SEE (Solid Earth and Environment) Grid, (2009). GeoSciML - the CGI Datamodel and Encoding http://www.seegrid.csiro.au/twiki/bin/vi ...
... Project, Romanian Journal on Information Science and Technology. Bucureşti: Publishing house of the Romanian academy, Vol. 7, No.1-2. Vossen, P. (ed.) (1998). EuroWordNet: A Multilingual Database with Lexical Semantic Networks. Dordrecht: Kluwer Academic Publishers ISO (2000). 1087-1, T ...Ranka Stanković, Ivan Obradović, Olivera Kitanović. "GIS Application Improvement with Multilingual Lexical and Terminological Resources" in Proceedings of the 5th International Conference on Language Resources and Evaluation, LREC 2010, Valetta, Malta, May 2010, Valetta, Malta : European Language Resources Association (2010)
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OER obrazovni sadržaji kao spona između akademskog i preduzetničkog znanja
... Learning, 2011. [2] C.J. Bonk. The world is open: How web technology is revolutionizing education,Wiley, 2009. [3] D. Millard, K. Borthwhick, Y. Howard, P. McSweeny, C. Hargood. The HumBox:Changing educational practice around a learning resource repository. In: Computers & Education 69, 2013, 287–302. ...
... Learning objects: resources for distance education worldwide. The International Review of Research in Open and Distance Learning 2(1), 2001. [7] P. McAndrew, A. Santos, S. Godwin. Opening up for OpenLearn: issues in providing open educational resources. In Proceedings of CAL07: Development, disruption ...Ivan Obradović, Ranka Stanković, Marija Radojičić. "OER obrazovni sadržaji kao spona između akademskog i preduzetničkog znanja" in The fifth Symposium Mathematics and Applications 2014,17-18 October 2014, Belgrade V no. 1, Beograd : Matematički fakultet Univerziteta u Beogradu (2014)
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Formative evaluation of e-learning projects with the logical framework approach
... , Valutare gli interventi formativi, Carocci, Roma, 2004. [3] Bezzi C., Il disegno della ricerca valutativa, Angeli, Milano, 2001. [4] Rossi P. H., Lipsey M. W., Freeman H. E., Evaluation: A Systematic Approach, SAGE publications, Thousand Oaks, CA, 2003. [5] Palumbo M., Il processo di ...
... thinking approaches for program evaluation illustrated using the Indiana Interdisciplinary GK-12, Evaluation and Program Planning, Vol. 32 No. 3, p. 187-196, 2009. [23] Chen, H., Practical program evaluation: Assessing and improving planning, implementation, and effectiveness, Thousand Oaks ...Roberto Linzalone, Giovani Schiuma, Ivan Obradović, Ranka Stanković. "Formative evaluation of e-learning projects with the logical framework approach" in The Sixth International Conference on e-Learning (eLearning-2015), September 2015, Belgrade, Serbia, Belgrade Metropolitan Univesity (2015)
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Утицај соларне активности на здравље човека
... (2016). Space Weather Effects on Humans in Tabuk City, KSA. International J. of App. Sci. and Tech., 6(1), 47-57. [13] Papathanasopoulosa, P., Preka-Papademab, P. et. al.(2016). The possible effects of the solar and geomagnetic activity on multiplesclerosis. Clinical Neurology and Neurosurgery, 146 ...Каролина Ђукић, Весна Цветков, Весна Дамњановић. "Утицај соларне активности на здравље човека" in VII Меморијални научни скуп из заштите животне средине доцент др Милена Далмација Нови Сад, 01-02. април 2019, Природно-математички факултет, Департман за хемију, биохемију и заштиту животне средине (2019)
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Terminological and lexical resources used to provide open multilingual educational resources
Open educational resources (OER) within BAEKTEL (Blending Academic and Entrepreneurial Knowledge in Technology enhanced learning) network will be available in different languages, mostly in the languages of Western Balkans, Russian and English. University of Belgrade (UB) hosts a central repository based on: BAEKTEL Metadata Portal (BMP), terminological web application for management, browse and search of terminological resources, web services for linguistic support (query expansion, information retrieval, OER indexing, etc.), annotation of selected resources and OER repository on local edX ...... Management, 1 st ed., M. Hepp, P. DeLeenheer, A. De Moor and Y.Sure, Ed. Springer US, 2008, pp. 3-22. [11] M. Uschhold and M. Gruninger, “Ontologies: Principles, methods and applications,” Knowledge engineering review, vol. 11, No. 2, pp. 93–136, June. 1996. [12] P. Pantel and L. Dekang, “A statistical ...Biljana Lazić, Danica Seničić, Aleksandra Tomašević, Bojan Zlatić. "Terminological and lexical resources used to provide open multilingual educational resources" in The Seventh International Conference on eLearning (eLearning-2016), 29-30 September 2016, Belgrade, Serbia, Belgrade : Belgrade Metropolitan University (2016)
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Development of integrated fuzzy model for mine management optimization
Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić (2023)... Analytic Hierarchy Process to Underground Mining, Method Selection, Sym- metry, 12(2), 192, DOI: https://doi.org/10.3390/sym12020192. Š| NAMIN P. S., A. GHApI, P. SAK (2022) A literature review of Multi Criteria Decision-Making (MCDM) towards mining; method selection (MMS), Resources Pol- icy, 77, 102676 ...Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić. "Development of integrated fuzzy model for mine management optimization" in Comptes rendus de l'Académie Bulgare des Sciences (2023)
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Conversion of land areas after coal mine closure and reclamation
Otkopavanje uglja površinski i podzemno praćeno je degradacijom zemljišta, promenom formiranja predela i izmenom flore i faune. Od velikog značaja je razvoj novih naučno utemeljenih pristupa obnovljanje antropogeno poremećenih predela zasnovanih na formiranju rekultivacionih i rudarskih tehnologija. Apsolutno je neophodno obezbediti sveobuhvatno kvalitetno očuvanje zemljišnih i vodnih resursa i odrediti rekultivisano zemljište za novu namenu. U ovom članku je dat pregled najpopularnijih metoda rekultivacije zemljišta i mogućnosti rekultivacije zemljišta nakon završetka rekultivacije i zatvaranja rudnika uglja.... positive ideal : : . :. : in a simple mathematical form. | removed from the decision solution problem. Logical Use simple diagrams to Framework P d Clarify the cause and Greatly affected by analyze complex · : : · Approach : effect in the project. important assumptions. (LPA) relations. Figure ...
... Australian Goverment (2016) Mine rehabilitation - Leading practice sustainable development program for the mining industry.1-68. Doley, D., Audet, P. What part of mining are ecosystems? Defining success for the "restoration" of highly disturbed landscapes. In: SQUIES, V.R. (ed.) Ecological restoration: ...Radmila Gaćina, Bojan Dimitrijević, Sanja Bajić. "Conversion of land areas after coal mine closure and reclamation" in 9th International conference mining and environmental protection MEP 23 Proceedings, Sokobanja, 24-27.05.2023., Belgrade : University of Belgrade - Faculty of mining and geology (2023)
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Influence of Ag doping on the morphological and magnetic properties in CuO nanopowders
Maria Čebela, Uroš Čakar, Vesna Lojpur, Maja Milošević, Sanja Krstić, Vladimir Dodevski, Milena Rosić (2023)... University of Belgrade, Serbia Dr. Dejan Zagorac, INN Vinca, University of Belgrade, Serbia 7 Conference of The Serbian Society for Ceramic Materials P-43 INFLUENCE OF Ag DOPING ON THE MORPHOLOGICAL AND MAGNETIC PROPERTIES IN CUO NANOPOWDERS Maria Čebela!?, Uroš Čakar", Vesna Lojpurl,Maja Milošević“ ...Maria Čebela, Uroš Čakar, Vesna Lojpur, Maja Milošević, Sanja Krstić, Vladimir Dodevski, Milena Rosić. "Influence of Ag doping on the morphological and magnetic properties in CuO nanopowders" in Programme ; and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia , Beograd : Institut za multidisciplinarna istraživanja, (2023)
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Valorization of non-balanced coal reserves in Serbia for underground coal gasification
David Petrović, Lazar Kričak, Milanka Negovanović, Stefan Milanović, Jovan Marković, Nikola Simić, Ljubisav Stamenić (2019)In the name of a better and safer energy future, it is our responsibility to focus our knowledge and activities to save on imported liquid and gas fossil fuels, as well as coal on which energy security of Serbia is based. The rationalization in the use of available energy resources certainly positively affects economy and the environment of a country. This paper indicates motivations for the application of the underground coal gasification process, as well as surface gasification for ...... Milanka N. NEGOVANOVIĆ”, Stefan V. MILANOVIĆ”, Jovan R. MARKOVIĆ”, Nikola Z. SIMIĆ”, and Ljubisav S. STAMENIĆĆ" 2 4D Konsalting, Belgrade, Serbia P Faculty of Mining and Geology, University of Belgrade, Belgrade, Serbia *Institute of Nuclear Sciences “Vinča”, University of Belgrade, Belgrade, Serbia ...
... 6B, pp. 4067-4081 The connection between drilled boreholes can be accomplished in following ways: — by connecting them to the compressed air line (p = 50 bar), or even nitrogen, — by water pressure with a pump set, and — by establishing a link with hydraulic fracturing, by means of high-pressure ...
... Oxygen, Steam CO,CO, H„ CH, |- —— Oxidation zone. —— j- Reduction zone +| -- Drying and Pyrolysis zone Oxidation Reduction Drying and pyrolysis P CYO, + CO,+ 3938MI / kmol C+CO,—- 2CO – 162.4 MI / kmol Coal — CH, +H,0 +CO. 2C+O, — 2CO + 231.4 MJ / kmol -+H,O ) » CO +H,- 131.5 MJ / kmo +CO, +H ...David Petrović, Lazar Kričak, Milanka Negovanović, Stefan Milanović, Jovan Marković, Nikola Simić, Ljubisav Stamenić. "Valorization of non-balanced coal reserves in Serbia for underground coal gasification" in Thermal Science (2019). https://doi.org/10.2298/TSCI190725390P