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| Знайдено в інших БД: | Реферативна база даних (5) |
Список видань за алфавітом назв: Авторський покажчик Покажчик назв публікацій  |
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Загальна кількість знайдених документів : 6 Представлено документи з 1 до 6 |
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| 1. | 
Falshtynskyi V. S. Substantiation into "rock massive – underground gasifier” system adaptability of Solenovskyi site in the Donetsk coal basin [Електронний ресурс] / V. S. Falshtynskyi, R. O. Dychkovskyi, P. B. Saik, V. H. Lozynskyi, E. C. Cabana // Науковий вісник Національного гірничого університету. - 2018. - № 3. - С. 14–21. - Режим доступу: http://nbuv.gov.ua/UJRN/Nvngu_2018_3_4 | ||
| 2. |
Saik P. B. Efficiency of underground gas generator in consideration of the reverse mode [Електронний ресурс] / P. B. Saik, V. S. Falshtynskyi, V. H. Lozynskyi, E. C. Cabana, M. S. Demydov, R. O. Dychkovskyi // Науковий вісник Національного гірничого університету. - 2020. - № 4. - С. 39-46. - Режим доступу: http://nbuv.gov.ua/UJRN/Nvngu_2020_4_8 Purpose. Activation of the processes of well underground coal gasification with the consideration of the reverse mode of the underground gas generator based on the balanced state between the oxidizing and reducing zones of the fire face. Methodology. The underground gas generator efficiency was evaluated based on the analytical and laboratory studies. Analytical substantiation of the implementation of reverse operations in terms of the underground gas generator is based on the quantitative parameters of coal gasification in the oxidizing and reducing zones of the underground gas generator and their advance rates. Laboratory studies were carried out on a stand unit with the modeling of the coal gasification processes. Findings. Efficiency of the underground gas generator operation by reversing with blowing mixtures has been substantiated, which helps to maintain the balance between its oxidizing and reducing zones. Time periods for the reverse operations have been identified on the basis of the averaged value of concentrations of the combustible generator gases on the outlet from the modeled underground gas generator. Originality. Dependences of the changes in displacements of the active underground gas generator zones in terms of the implemented reverse of blowing mixture supply have been obtained with the consideration of mining and geological conditions of the occurrence of coal seam c | ||
| 3. | 
Babets D. Implementation of probabilistic approach to rock mass strength estimation while excavating through fault zones [Електронний ресурс] / D. Babets, O. Sdvyzhkova, O. Shashenko, K. Kravchenko, E. C. Cabana // Mining of mineral deposits. - 2019. - Vol. 13, Iss. 4. - С. 72-83. - Режим доступу: http://nbuv.gov.ua/UJRN/rr_2019_13_4_10 | ||
| 4. |
Vladyko O. Formation of the models of mining enterprise management [Електронний ресурс] / O. Vladyko, D. Maltsev, E. C. Cabana, Ia. Shavarskyi, R. Dychkovskyi // Naukovyi visnyk Natsionalnoho Hirnychoho Universytetu. - 2022. - № 3. - С. 30-36. - Режим доступу: http://nbuv.gov.ua/UJRN/Nvngu_2022_3_7 Purpose. To develop a comprehensive model of a mining enterprise, to define types of models for mathematical modelling at all management levels, and to determine principles and approaches to the formation of new input data concerning both technologies and their subsystems while combining the technologies. Methodology. To achieve the goal, a systems approach is used, which allows selecting the types of models for modelling the enterprise activities in terms of technologies and subsystems and determining the method of generating own input data for them. For this purpose, the following was completed: the available literature and patent sources were processed and generalized; scientific and technical papers on the selection and application of the varieties of models in mining were analyzed; the principles and individual approaches to the input data formation for mathematical modelling were considered. That makes it possible to select a software mechanism and create simulation models for effective management of a mining enterprise. Findings. Types of models for mathematical modelling at the operational, tactical, and strategic levels of enterprise management were determined and substantiated. Connection between the types of models used by management levels was specified. An expert survey for modelling at the operational level, simulation modelling at the tactical level, and dynamic programming at the strategic level of management were selected. A schematic diagram of modelling of a mining enterprise, whose structure included technologies and their subsystems at various management levels, were developed. The principles of input data formation to model all subsystems, either operating or being prepared for their implementation, were studied. The authors' own approaches to the input data formation at the levels of management and technological subsystems were defined. Originality. While performing a particular solution of the discrete problem by Bellman method, dependences of minimizing the operations for enterprise management while forming a technological chain of a mine, provided meeting the requirements of production process continuity, were obtained. These studies are aimed at establishing a complex information system with its division into elements, each of which is then used to simulate the whole mining enterprise. Practical value. It means developing a comprehensive model of a mining enterprise, determining the types of models for mathematical modelling at all management levels, establishing a new way of input data formation in terms of both technologies and their subsystems with the implementation of additional mineral-mining technologies. | ||
| 5. |
Moshynskyi V. S. Simulation of amber extraction processes from sandy and clay rocks with stope filling [Електронний ресурс] / V. S. Moshynskyi, V. Ya. Korniienko, Ye. Z. Malanchuk, A. O. Khrystyuk, V. H. Lozynskyi, E. C. Cabana // Naukovyi visnyk Natsionalnoho Hirnychoho Universytetu. - 2021. - № 6. - С. 35-41. - Режим доступу: http://nbuv.gov.ua/UJRN/Nvngu_2021_6_8 Purpose. To develop a mathematical model for a system of amber extraction based upon physical cumulation and deflation effects under the conditions of turbulent flows. Methodology. Theoretical simulation of the extraction processes took into consideration use of a basic aggregate, converting processes, compounding processes, modification processes, aggregating processes, processes of rotation series development involving practices of design and operation of the available similar facilities, design solutions, and widespread unification of both components and assembly units. Analysis of the gained theoretical and practical experiences helped simulate processes of amber extraction from sandy and clay rocks with stope filling. Findings. Rock mass loosening by means of hydromonitor jets, operating tangentially in a casing while developing swirling pulp flows, has been simulated mathematically. A procedure to prepare filling material from mine tailing by means of a preparator, located within a settling pond, has been substantiated. The research, concerning mineral disintegration, has helped identify that the average value of the maximum deflector radius, shaped as a result of counter jetting action, is R | ||
| 6. |
Nikolsky V. Thermodynamics of the developing contact heating of a process liquid [Електронний ресурс] / V. Nikolsky, R. Dychkovskyi, A. Lobodenko, H. Ivanova, E. C. Cabana, Ja. Shavarskyi // Naukovyi visnyk Natsionalnoho Hirnychoho Universytetu. - 2022. - № 2. - С. 48-53. - Режим доступу: http://nbuv.gov.ua/UJRN/Nvngu_2022_2_10 Purpose. To study development of contact heating of a process liquid basing on the main principles of thermodynamics in terms of specially developed equipment. Methodology. The research of efficient operation of plants for contact heating of process liquids was based on analytical and laboratory studies. The analytical studies relied on determining heat and material balance of the process on the basis of quantitative parameters of the obtained heat, basing on contact heating of water (process liquid) as the end (intermediate) heat carrier. Test studies were carried out in terms of special plants for modelling thermodynamic processes of contact liquid heating. Findings. The efficiency of operation of the special equipment was substantiated by improving its design that makes it possible to preserve the balance between temperatures of liquids on the inlet and outlet of a special heating plant. Basing on the averaged value of the parameters characterizing thermodynamic transformations, time periods of the process liquid heating were identified. Originality. Dependences and numerical values of changes in maximum equilibrium temperature (boiling temperature) and relative amount of the evaporated water on the specified excess-air coefficient during the natural gas combustion in the submerged combustion devices were obtained. Parameters of the temperature field distribution in the heating system were obtained basing on the design features of a heating plant. The research data were aimed at identifying the efficiency of system operation depending on water consumption at the device inlet. The research was carried out in terms of one-stage and two-stage heating of a process liquid. Practical value. Design of a test plant for thermochemical water heating was improved; that helped simplify a process of the heating plant control to get maximum amount of heat energy. The efficiency of its operation was substantiated by controlling the temperature field distribution in the heating devices. | ||
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