Faculty of Mining, Geology and Petroleum Engineering Repository
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Model of the potentional crushed stone open pit mine Krndija-Gradac development : master's thesis
No full textU ovom diplomskom radu prikazan je prijedlog rješenja eksploatacije tehničko-građevnog kamena na eksploatacijskom polju „Krndija-Gradac“ i razvoj rudarskih radova kroz faze rada. Razvoj eksploatacijskog polja odvijati će se kroz tri faze. Napravljena je analiza značajki okoline eksploatacijskog polja te su pomoću programa „OpenRoads Designer 2023“ napravljeni trodimenzionalni modeli ležišta. Pomoću 3D modela dobiveni su podaci za proračun volumena pomoću metode paralelnih presjeka i metode računalnog modeliranja. Provedena je i Tehno-ekonomska analiza ležišta.This master thesis presents a proposal for a solution for the exploitation of crushed stone in the exploitation field "Krndija-Gradac" and the development of mining works through its stages. The development of the exploitation field will take place through three phases. An analysis of the features of the exploitation field environment was made, and three-dimensional models of the deposit were made using the "OpenRoads Designer 2023" program. Using the 3D models, data was obtained for volume calculation using the method of parallel sections and the computer modeling method. A techno-economic analysis of the deposit was also carried out
The Alps as the main source of sand for the Late Miocene Lake Pannon (Pannonian Basin, Croatia)
No full textThe provenance of the Upper Miocene sandstones from the Sava and Drava depressions of the North Croatian Basin was investigated using petrographic, geochemical, and heavy mineral analyses, including Raman spectroscopy. The study of these sandstones, which represent important oil and gas reservoirs in Croatia, allowed reconstruction of the Late Miocene source-to-sink model of the Lake Pannon drainage system and the evolution of the southwestern Pannonian Basin. The studied feldspatho-litho-quartzose sandstones consist of a mixture of sedimentary, metamorphic, and igneous detritus. Heavy-mineral assemblages are dominated by almandine-rich garnet with apatite, epidote, tourmaline, rutile, zircon, staurolite, and zoisite, indicative of low to medium-grade metamorphic source rocks. Higher concentrations of Ca and Mg than in the Upper Continental Crust standard (UCC) additionally reflect the abundance of limestone and dolostone rock fragments as well as carbonate cement. Geochemical compositional variations between sandstone samples from the Sava and Drava depressions primarily stem from diagenetic processes. CIX and alpha values indicate only minor weathering. Compositional features indicate an orogenic source located in the Eastern Alps and primarily represented by Austroalpine and Penninic nappes. This research offers a novel perspective to distinguish the Upper Miocene reservoirs from other sedimentary units within the basin, contributing to a more comprehensive understanding of the regional geological dynamics and supporting future exploration projects also related to energy transition
Development, accreditation and implementation of doctoral school on social licence to operate (SLO)
No full textThe European raw materials sector is crucial for the continent's green and digital transformation. However, many raw materials projects face significant delays or cancellations due to community opposition, rooted in concerns over social, environmental, and ethical issues. This resistance underscores the importance of Social Licence to Operate (SLO), a concept that involves obtaining and maintaining community approval for projects. Currently, European engineering education lacks specialized content to address these SLO challenges, which hampers the sector’s ability to operate sustainably and effectively engage with local communities. The EIT funded PRO-SLO project aims to bridge this educational gap by developing a specialized PhD school dedicated to Social Licence to Operate. The project’s core objectives include: (1) Designing and accrediting a comprehensive PhD curriculum on SLO; (2) Implementing the course through two pilot schools in Bosnia and Herzegovina (2025) and Greece (2026); (3) Ensuring long-term sustainability of the program by integrating it with SLO conferences and adapting based on feedback. The expected outcomes include enhanced competence among future industry leaders to manage SLO challenges, ultimately leading to more sustainable and community-oriented raw materials projects. This work is presented on behalf of the entire PRO-SLO team, which includes experts from various institutions who have made significant contributions to the development and forthcoming implementation of the PhD School. The team's collective expertise in Social Licence to Operate and raw materials management has been crucial in shaping the PhD School
Tracing the origin of raw materials used for the production of ancient ceramics: a case study of multi-period archaeological sites in the Turopolje area (Continental Croatia)
No full textThe selection of raw materials for ancient pottery production was influenced by a variety of technological and cultural factors, underscoring the importance of characterising these materials to understand the technology of ancient societies. This research examines ancient ceramics from two multi-period archaeological sites: Staro Čiče-Gradišće (Neolithic, Copper Age, Copper/Early Bronze Age, Early Bronze Age, Late Bronze Age, Roman period, and Late Mediaeval period) and Kurilovec-Belinščica (Early Bronze Age and Middle/Late Bronze Age), alongside potential clayey raw materials collected near these settlements. Using a multi-analytical approach (optical microscopy, X-ray powder diffraction, mass and emission spectrometry, and laser granulometry), the research aims to determine the characteristics of the paste recipes (raw clay and tempers) and to examine the type and provenience of the raw materials used for ancient pottery production over different periods of the past (from the Neolithic to the Late Mediaeval period). The results showed that ancient potters preferred to use moderately plastic, sandy clay, while Bronze Age potters often used highly plastic clay. Potters utilised various non-plastic tempering materials, such as sands and gravels, grog, and mollusc shells, with their choice being influenced by the need to enhance technological properties as well as by regional and culturally determined pottery traditions. Most of the ceramics are of local origin, made from easily available raw materials that represent flood sediments of the nearby Sava River. However, non-local materials were detected in Neolithic samples, indicating the presence of exchange networks among those communities
Bauxites: from records of long-lasting warm-humid conditions in subaerially exposed areas to strategic raw materials
No full textOnline workshop Western Istrian Anticline as an Ideal Natural Laboratory for the Study of the Regional Unconformities in Carbonate Rocks, Friday, April 12, 2024
Introduction: schedule, instructions and certifications
No full textOnline workshop Western Istrian Anticline as an Ideal Natural Laboratory for the Study of the Regional Unconformities in Carbonate Rocks, Friday, April 12, 2024
Prezentacija novog sveučilišnog diplomskog studijskog programa RGN fakulteta Primijenjena geologija i geološko inženjerstvo : modul Hidrogeologija
No full textDodaci eksplozivima smanjene gustoće : završni rad
No full textEksplozivi smanjene gustoće su smjese eksploziva s određenim dodacima kako bi im se smanjila gustoća. Dodavanjem različitih materijala se mijenjaju fizikalna svojstva eksploziva poput povećanja volumena ili smanjenja osjetljivosti na trenje i udare. Prilikom ispitivanja takvih eksploziva najviše se obraća pažnja na brzinu detonacije koja je usko povezana s tlakom detonacije kao i brizantošću. U ovom radu su se dodavali staklo, vapno, sijeno, piljevina, papir i plastika
Comparison of specific energies for cutting, drilling and sawing Plano dimension stones : master's thesis
No full textZa eksploataciju mineralnih sirovina koriste se razni procesi razrušavanja stijene među koje spadaju rezanje, bušenje i piljenje. Sva tri procesa se javljaju u nekom obliku u kamenolomima arhitektonsko – građevnog kamena, gdje se primarni blokovi dobivaju kombinacijom lančane sjekačice, hidraulične rotacijske bušilice i dijamantne žične pile. Navedeni strojevi imaju različite radne veličine ali im je mehanika razrušavanja stijene gotova ista, pa je temeljem toga postavljena hipoteza kako su i specifične energije rezanja, bušenja i piljenja iste, jedina razlike je u putanji reznog elementa. U literaturi su pronađeni znanstveni radovi i doktorske disertacije u kojima su izvedena ispitivanja u kojima su se odredile specifične energije rezanja, bušenja i piljenja ali nije pronađen nijedan rad koji pokušava usporediti specifične energije sva tri procesa. U disertaciji Antoljak (2019) provedeno je terensko ispitivanje na kamenolomu Redi pored mjesta Plano u kojem su uz fizikalno-mehanička svojstva stijenskih uzoraka dobiveni i iznosi specifičnih energija rezanja i bušenja u ovisnosti o CERCHAR indeksu abrazivnosti. U znanstvenom radu Bagherpour i dr. (2020) izvedeno je ispitivanje specifične energije piljenja te je dobivena relacija u kojoj je abrazivnost izražena preko Schimazekovog faktora abrazivnosti. U literaturi su pronađena ispitivanja u kojima se iskazuju ovisnost CERCHAR i Schimazekovog faktora abrazivnosti, pomoću tih radova iznosi svih triju specifičnih energija se mogu izraziti preko Schimazekovog faktora abrazivnosti, preko tih relacija i podataka o svojstvima stijenskih uzoraka sa kamenoloma Redi iznosi za sve tri specifične energije se mogu uspoređivati.In order to excavate mineral resources some sort of rock disintegration process has to be utilized, for example cutting, drilling or sawing. All three of the processes are present in some way, shape, or form in a dimension stone quarry, where the primary blocks are obtained through the usage of chainsaws, hydraulic rotary drills and diamond wire saws. These machines have vastly different work parameters, but the way they operate on a basic level is similar, so based on that a hypothesis can be made that the specific energies of cutting, drilling, and sawing are also similar, the only difference being in the trajectories of the cutting element. Scientific papers, in which the specific energies of cutting, drilling and sawing were individually being experimented on, were observed but no scientific paper was found where an author tried to compare all three of these specific energies at once. In a doctoral thesis by Antoljak (2019.) extensive laboratory tests and field measurements were carried out at a dimension stone quarry Redi near Plano, the result of which was data about the physical and mechanical properties of rock samples from the same quarry along with equations describing the relation between cutting and drilling specific energies as a function of CERCHAR factor of abrasivity. In a scientific paper by Bagherpour and others (2020) similar laboratory tests were carried out and the result was an equation that describes the relation between specific energy for sawing with various rock characteristics including Schimazek's factor of abrasivity. Papers made by other various authors which detail the relation between CERCHAR and Schimazek’s factors of abrasivity were observed. All three specific energies were expressed as a function of Schimazek's factor of abrasivity and together with the field data from Redi quarry can be further compared
Važnost povećanja kapaciteta UPP terminala na tržište plina zemalja Srednje Europe : završni rad
No full textOvaj rad istražuje važnost povećanja kapaciteta terminala za ukapljeni prirodni plin (UPP) na otoku Krku na tržište plina zemalja Srednje Europe. UPP terminal je ključna infrastruktura koja omogućuje prihvat, uplinjavanje i otpremu UPP u regiji. Povećanje kapaciteta terminala može značajno utjecati na energetsku sigurnost i diversifikaciju opskrbe plinom u zemljama Srednje Europe što doprinosi stabilnosti tržišta. U radu se analizira trenutno stanje kapaciteta UPP terminala u Republici Hrvatskoj. Također se analiziraju infrastrukturna i tehnička unaprjeđenja koja su potrebna za povećanje kapaciteta terminala