This page has only limited features, please log in for full access.
Technical University of Kosice Faculty BERG 042 00 Kosice Slovak Republic
Crushing is one of the most energy-consuming technological processes. The purpose of grinding is to achieve the desired grain size of mineral raw materials. The process of grinding consists of many factors, for example, the size and form of crushed grains, as well as their mutual arrangement inside the crushing machine chamber, the technological parameters of the crusher, the material properties, and the speed of the moving grains. One of the key parameters of the aggregate is its resistance to grinding. Resistance to grinding is related to the strength of the products made from aggregates subjected to grinding, which affects the overall quality of these products. Therefore, the aim of this study is to analyze the impact of the crushing of natural aggregate on the LA crumbling strength index. Two types of aggregates were analyzed—natural gravel and natural pebbles crushed in a crusher. Aggregates were acquired from two mines belonging to the plant Kruszgeo S.A. in Rzeszów, i.e., ZEK (Zakład Eksploatacji Kruszywa) Ostrów and ZEK Strzegocice II. The aggregate crushing process was carried out for 4–8 mm and 10–14 mm fractions using cone crushers of the 1044 type. Aggregate crushing was carried out in a Los Angeles drum, in accordance with the requirements of EN 1097-2:2020. The analysis showed that for grits of the 10–14 mm fraction, the lower values of the LA indices were obtained, which allows for obtaining a bigger index of crushing strength than in the case of crushing using the 4–8 mm fraction. This analysis showed how important the process of grinding aggregates is and, thus, the appropriate selection of fractions for the grit crushing process for the aggregate strength on grinding. Subjecting the aggregate to the grinding process results in an improvement in the crushing strength indicator, thus obtaining better strength parameters of the products manufactured from the aggregates subjected to the process of crushing (for example, concrete). The originality of the study is an analysis of key Polish aggregates and the crushing strength index.
Andrzej Pacana; Dominika Siwiec; Lucia Bednarova; Marian Sofranko; Olga Vegsoova; Martin Cvoliga. Influence of Natural Aggregate Crushing Process on Crushing Strength Index. Sustainability 2021, 13, 8353 .
AMA StyleAndrzej Pacana, Dominika Siwiec, Lucia Bednarova, Marian Sofranko, Olga Vegsoova, Martin Cvoliga. Influence of Natural Aggregate Crushing Process on Crushing Strength Index. Sustainability. 2021; 13 (15):8353.
Chicago/Turabian StyleAndrzej Pacana; Dominika Siwiec; Lucia Bednarova; Marian Sofranko; Olga Vegsoova; Martin Cvoliga. 2021. "Influence of Natural Aggregate Crushing Process on Crushing Strength Index." Sustainability 13, no. 15: 8353.
This paper presents a comprehensive view of mine surveying and proposes standards of how to address this issue. The problem is related to the worn-out system for creating mining mapwork, which no longer meets the requirements of the present age. The aim of the research is to devise and propose a new functional system of standardization of map works (STAMAP) for the needs of the practice and the environment, which is being developed at FBERG. The creation of mine surveying documentation contains information relating to the environment and therefore it is necessary to harmonize the creation of a specific group of spatial information with current European legislation represented by the INSPIRE directive. The new system developed, STAMAP, uses a new classification of map symbols, the CMY (Cyan, Magenta, Yellow) colour scale and systematization of graphic files. The paper also includes practical and functional verification of the usability/functionality of the proposed standards using the example of creating digital mine surveying documentation for the Brestov quarry. The new scientific approach for standardizing map work, the STAMAP system, has up to 50% better results in terms of creating and identifying mine surveying documentation compared to the current situation.
Kamil Kyšeľa; Peter Blišťan; Oľga Végsöová. The Importance of Standardizing the Mapping of Surface Mining Operations for the Purpose of Minimizing Errors and Impacts on the Environment. Polish Journal of Environmental Studies 2021, 30, 1227 -1235.
AMA StyleKamil Kyšeľa, Peter Blišťan, Oľga Végsöová. The Importance of Standardizing the Mapping of Surface Mining Operations for the Purpose of Minimizing Errors and Impacts on the Environment. Polish Journal of Environmental Studies. 2021; 30 (2):1227-1235.
Chicago/Turabian StyleKamil Kyšeľa; Peter Blišťan; Oľga Végsöová. 2021. "The Importance of Standardizing the Mapping of Surface Mining Operations for the Purpose of Minimizing Errors and Impacts on the Environment." Polish Journal of Environmental Studies 30, no. 2: 1227-1235.
Uranium is one of the strategic minerals used mainly in energetics. The main purpose of uranium mining is to achieve maximum production to meet the rapidly growing demand for energies. It needs to become aware that technological progress in mining processes could significantly reduce the negative impacts associated with environmental, economic, and social risks. Uranium mining is one of the most controversial topics. It is dealt with by many experts and scientists around the world. Various methods and technologies of uranium mining are encountered in professional journals, as well as political or socio-economic decisions based on the impact and importance of the energy potential of uranium deposits, or the environmental impacts of uranium mining. The deposit of Kuriskova is one of the most perspective deposits not only in Slovakia but also in the world. The deposit is located near the town of Kosice (with near 240,000 inhabitants) and near the recreational area of Jahodna in the east of the Slovak Republic. The analysis and determination of the energy potential of the deposit of Kuriskova shows that uranium reserves from this deposit would be able to fully cover the needs for nuclear power plants for the production of nuclear fuel, in the Slovak Republic, even in the longer term. With the above-mentioned energy potential of the deposit of Kuriskova at the level of 600 TWh, nuclear power plants in the Slovak Republic are able to be supplied with raw materials from the deposit of Kuriskova for about 40 years with the current amount of electricity produced (approx. 15 TWh). Therefore, for the purposes of this research, a proposal for the extraction of uranium reserves at the deposit of Kuriskova was made. Based on it, it is possible to determine the amount of recoverable uranium reserves from the deposit. A methodology has been determined with mining this proposal, which takes into account the basic criteria of uranium deposit mining, which was used for the selection of a suitable mining technology for the uranium deposit of Kuriskova.
Marian Sofranko; Samer Khouri; Olga Vegsoova; Peter Kacmary; Tawfik Mudarri; Martin Koncek; Maxim Tyulenev; Zuzana Simkova. Possibilities of Uranium Deposit Kuriskova Mining and Its Influence on the Energy Potential of Slovakia from Own Resources. Energies 2020, 13, 4209 .
AMA StyleMarian Sofranko, Samer Khouri, Olga Vegsoova, Peter Kacmary, Tawfik Mudarri, Martin Koncek, Maxim Tyulenev, Zuzana Simkova. Possibilities of Uranium Deposit Kuriskova Mining and Its Influence on the Energy Potential of Slovakia from Own Resources. Energies. 2020; 13 (16):4209.
Chicago/Turabian StyleMarian Sofranko; Samer Khouri; Olga Vegsoova; Peter Kacmary; Tawfik Mudarri; Martin Koncek; Maxim Tyulenev; Zuzana Simkova. 2020. "Possibilities of Uranium Deposit Kuriskova Mining and Its Influence on the Energy Potential of Slovakia from Own Resources." Energies 13, no. 16: 4209.
Our paper is devoted to the reclamation of the environment degraded by mining activities. Specifically, it is about an andesite quarry in Vihorlat mountain range. The results show that stabilization of slopes is important from the point of view of technical reclamation of the environment. For mining purposes, the slope angle was defined as 60°. During the opening, preparation and realization of the extraction, the parameters of the operation were influenced by the cohesion in the rock mass c = 14.29 MPa, bulk mass γ = 2.646 kg, m-3 and internal friction angle φ = 50-75°. As part of the reclamation of the degraded area, it is also necessary to perform biochemical reclamation to increase the biodiversity of the area. One possibility is to build a water tank with a bottom area of 8,700 m2. The project results in the following dam parameters: 26 m heel thickness, 5 m thickness on the top, 12 m width, 11 m height, water slope angle 42° and air slope angle 51°. The possibilities of the reclaimed environment of the Zemplínske Hámre quarry are various.
Marian Šofranko; Oľga Végsöová; Tomáš Kalász; Vladimír Sulovec; Ján Beca; Martin Šuver. Effect of Reclamation on an Environment Impaired by Mining Activity: A Case Study. Polish Journal of Environmental Studies 2020, 29, 3329 -3337.
AMA StyleMarian Šofranko, Oľga Végsöová, Tomáš Kalász, Vladimír Sulovec, Ján Beca, Martin Šuver. Effect of Reclamation on an Environment Impaired by Mining Activity: A Case Study. Polish Journal of Environmental Studies. 2020; 29 (5):3329-3337.
Chicago/Turabian StyleMarian Šofranko; Oľga Végsöová; Tomáš Kalász; Vladimír Sulovec; Ján Beca; Martin Šuver. 2020. "Effect of Reclamation on an Environment Impaired by Mining Activity: A Case Study." Polish Journal of Environmental Studies 29, no. 5: 3329-3337.
Our paper deals with the solution of ecological flood-type accidents and the mitigation of their impacts during their occurrence. The main task is to defeat an accident on a watercourse as soon as possible, efficiently and economically, by arranging a floating boom. Closer specifications of the paper involve the technical use of floating booms and the calculation of the resistance force, which influences the application of a floating boom at a given current velocity. The calculations show that flow and size of a river flow has a direct effect on the size of the force that impinges on a barrage. The maximum river flows are in the time of January and February. The smallest river has flow of about 2.346 m3s-1 in this time, and the biggest river has a flow of 28.88 m3s-1 in defined time.
Oľga Végsöová; Samer Khouri; Martin Straka; Andrea Rosova; Peter Kačmáry; Miroslav Betuš. Using Technical Means and Logistics Principle Applications to Solve Ecological Water Course Accidents. Polish Journal of Environmental Studies 2019, 28, 3875 -3883.
AMA StyleOľga Végsöová, Samer Khouri, Martin Straka, Andrea Rosova, Peter Kačmáry, Miroslav Betuš. Using Technical Means and Logistics Principle Applications to Solve Ecological Water Course Accidents. Polish Journal of Environmental Studies. 2019; 28 (5):3875-3883.
Chicago/Turabian StyleOľga Végsöová; Samer Khouri; Martin Straka; Andrea Rosova; Peter Kačmáry; Miroslav Betuš. 2019. "Using Technical Means and Logistics Principle Applications to Solve Ecological Water Course Accidents." Polish Journal of Environmental Studies 28, no. 5: 3875-3883.
Dušan Malindžák; Ján Spišák; Oľga Végsoová. Approaches to designing OF logistics systems in terms of relationship of knowledge level and solution efficiency and their application in metallurgy. METAL 2019 Conference Proeedings 2019, 1 .
AMA StyleDušan Malindžák, Ján Spišák, Oľga Végsoová. Approaches to designing OF logistics systems in terms of relationship of knowledge level and solution efficiency and their application in metallurgy. METAL 2019 Conference Proeedings. 2019; ():1.
Chicago/Turabian StyleDušan Malindžák; Ján Spišák; Oľga Végsoová. 2019. "Approaches to designing OF logistics systems in terms of relationship of knowledge level and solution efficiency and their application in metallurgy." METAL 2019 Conference Proeedings , no. : 1.
Among all biomass resources the work concentrates on one of the most important fuel source - dendromass. This paper focuses on comparison of some energy woody species for process of combustion from the aspect of amount of produced emissions, lower calorific value, humidity and presence of solid pollutants. The measured results compare which woody species are more suitable in terms of influence on the environment and surroundings.
Olga Vegsoova. Energy Utilization of Selected Woody Species in Terms of their Impact on the Environment. Advanced Materials Research 2014, 1001, 38 -44.
AMA StyleOlga Vegsoova. Energy Utilization of Selected Woody Species in Terms of their Impact on the Environment. Advanced Materials Research. 2014; 1001 ():38-44.
Chicago/Turabian StyleOlga Vegsoova. 2014. "Energy Utilization of Selected Woody Species in Terms of their Impact on the Environment." Advanced Materials Research 1001, no. : 38-44.
The submitted article is dealing with very delicate problem, how to supply with energy the whole system for polymetallic nodules mining. The whole mining system requires almost 6 megawatts. The environmental impact should be enormous at every level of the seabed mining, so it has to be taken in consider choosing the best way how to supply the mining system with energy. The article deals with renewable energy and its possible utilization at the sea.
Lucia Domaracká; Olga Vegsoova. Ecological Energy Systems Suitable for Polymetallic Nodules Mining from the Seabed. Advanced Materials Research 2014, 1001, 33 -37.
AMA StyleLucia Domaracká, Olga Vegsoova. Ecological Energy Systems Suitable for Polymetallic Nodules Mining from the Seabed. Advanced Materials Research. 2014; 1001 ():33-37.
Chicago/Turabian StyleLucia Domaracká; Olga Vegsoova. 2014. "Ecological Energy Systems Suitable for Polymetallic Nodules Mining from the Seabed." Advanced Materials Research 1001, no. : 33-37.