{"title":"Analysis of the influence of the с8н coal seam thickness of Dniprovska mine on the content of germanium","authors":"V. Ishkov, Ye.S. Kozii, O. Chernobuk","doi":"10.33271/crpnmu/70.076","DOIUrl":"https://doi.org/10.33271/crpnmu/70.076","url":null,"abstract":"","PeriodicalId":10466,"journal":{"name":"Collection of Research Papers of the National Mining University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84290694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Research of the process of crushing graphite grinding in a central mill","authors":"I. Ostashko, V. Karpenko","doi":"10.33271/crpnmu/70.126","DOIUrl":"https://doi.org/10.33271/crpnmu/70.126","url":null,"abstract":"","PeriodicalId":10466,"journal":{"name":"Collection of Research Papers of the National Mining University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74988455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Bublikov, M. Isakova, V. Nadtochyi, D. Zybalov, Yuliya Halchenko, M. Khoroshailov
{"title":"Modified algorithm of automatic temperature control in an electric resistance furnace for metal heat treatment","authors":"A. Bublikov, M. Isakova, V. Nadtochyi, D. Zybalov, Yuliya Halchenko, M. Khoroshailov","doi":"10.33271/crpnmu/70.134","DOIUrl":"https://doi.org/10.33271/crpnmu/70.134","url":null,"abstract":"","PeriodicalId":10466,"journal":{"name":"Collection of Research Papers of the National Mining University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88642608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Purpose. To carry out a comprehensive analysis of the problems of forensic gemological examination arising from the study of industrial and semi-industrial batches of amber in raw materials weighing more than 100 kg for further study in the laboratory, to formulate appropriate recommendations. Method. The work uses general scientific research methods - empirical and theoretical (analysis, generalization, comparison, explanation). Part of the work is based on the results of previous studies. Results. It is shown that the proposed method for reducing large lots of amber makes it possible to create a representative (analytical) sample that maximally corresponds to the composition of the entire amber batch and repeats all its properties. The proposed guidelines use the classical approach to sample quartering, adapted to the legal environment in which the forensic scientist works. The аuthenticity and reliability of the methodology is confirmed by the convergence of the obtained analytical sample with the results of the study of the original batch of amber. The correlation coefficient of the Pearson calculation ensures the objectivity of the technique. The proposed method for reducing and obtaining representative samples is focused on obtaining objective results and, which is very important, ensures the invulnerability of an expert in his professional activities when conducting a gemological examination. Scientific novelty. The algorithm for reducing large lots of amber is based on a hierarchical model, including weighing and reconciling data with accompanying documents, determining the number of fractions in the ratio in the original samples, grouping samples according to the convergence of fractions, quartering as a process of forming a representative sample, determining the number of fractions, assessing the reliability of the results obtained . The proposed methodology in the future will expand and improve the scientific and methodological base of the Expert Services of the Ministry of Internal Affairs of Ukraine and other organizations of a related profile. Practical significance. The use of the considered method of forming a representative sample of amber from large lots weighing more than 100 kg will allow specialists to select the necessary set of methods and actions for this type of raw material and, thereby, ensure the maximum compliance of the analytical sample with the composition of the entire amber batch, fully repeating its qualitative properties.
{"title":"Reduction of batches of large quantities of amber","authors":"P. Baranov, O. Slyvna, B. Zhuk","doi":"10.33271/crpnmu/69.133","DOIUrl":"https://doi.org/10.33271/crpnmu/69.133","url":null,"abstract":"Purpose. To carry out a comprehensive analysis of the problems of forensic gemological examination arising from the study of industrial and semi-industrial batches of amber in raw materials weighing more than 100 kg for further study in the laboratory, to formulate appropriate recommendations. Method. The work uses general scientific research methods - empirical and theoretical (analysis, generalization, comparison, explanation). Part of the work is based on the results of previous studies. Results. It is shown that the proposed method for reducing large lots of amber makes it possible to create a representative (analytical) sample that maximally corresponds to the composition of the entire amber batch and repeats all its properties. The proposed guidelines use the classical approach to sample quartering, adapted to the legal environment in which the forensic scientist works. The аuthenticity and reliability of the methodology is confirmed by the convergence of the obtained analytical sample with the results of the study of the original batch of amber. The correlation coefficient of the Pearson calculation ensures the objectivity of the technique. The proposed method for reducing and obtaining representative samples is focused on obtaining objective results and, which is very important, ensures the invulnerability of an expert in his professional activities when conducting a gemological examination. Scientific novelty. The algorithm for reducing large lots of amber is based on a hierarchical model, including weighing and reconciling data with accompanying documents, determining the number of fractions in the ratio in the original samples, grouping samples according to the convergence of fractions, quartering as a process of forming a representative sample, determining the number of fractions, assessing the reliability of the results obtained . The proposed methodology in the future will expand and improve the scientific and methodological base of the Expert Services of the Ministry of Internal Affairs of Ukraine and other organizations of a related profile. Practical significance. The use of the considered method of forming a representative sample of amber from large lots weighing more than 100 kg will allow specialists to select the necessary set of methods and actions for this type of raw material and, thereby, ensure the maximum compliance of the analytical sample with the composition of the entire amber batch, fully repeating its qualitative properties.","PeriodicalId":10466,"journal":{"name":"Collection of Research Papers of the National Mining University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84790991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Purpose. To establish the analytical regularity of the calculation of the maximum value of the line of least resistance (LLR) of the explosive (E), taking into account the physical and mechanical properties of the rock mass and the detonation characteristics of the explosive. The methodology of research. Numerical modeling by the finite element method (FEM) to change the stress-strain state of the model established the value of the LLR at different diameters of the charge cavity, the pressure of explosion products and the tensile strength of rocks. Regression analysis obtained an empirical pattern of changes in the LLR depending on the physical and mechanical properties of the rock mass and the detonation characteristics of explosives. Mathematical modeling establishes analytical regularities of LLR calculation for zones of crack formation and intensive fragmentation. Findings. According to the change in the stress state of the model material around the charging cavity, the empirical regularity of changing the maximum value of the LLR depending on the diameter of the charging cavity and the diameter of the explosive charge, the density and rate of detonation of explosives, the compressive and shear strength. According to the developed calculation scheme, analytical regularities of LLR calculation for zones of crack formation and intensive fragmentation are obtained. By comparing the results of LLR calculation according to the obtained regularities, the most correct formula for LLR calculation was chosen, which turned out to be the analytical regularity of LLR calculation for the zone of intensive fragmentation. The originality. The power law is established for determining the LLR of an E, which comprehensively takes into account the radius of the crush zone, the diameter of the charging cavity and charge, the density and detonation velocity of E, the compressive strength of rocks, their fracturing and compaction under the action of rock pressure, which makes it possible to calculate the parameters of drilling and blasting (D&B) for breaking massif along the zone of intensive fragmentation. Practical implications. According to the results of the research, an analytical regularity of the calculation of the LLR of the explosive charge in the zone of intensive fragmentation was obtained, the use of which will allow to rationalize the D&B parameters in ore mining with the help of industrial explosives.
{"title":"Numerical simulation of the line of least resistanceduring the explosion of charges","authors":"M. Kononenko, O. Khomenko, A. Kosenko","doi":"10.33271/crpnmu/69.043","DOIUrl":"https://doi.org/10.33271/crpnmu/69.043","url":null,"abstract":"Purpose. To establish the analytical regularity of the calculation of the maximum value of the line of least resistance (LLR) of the explosive (E), taking into account the physical and mechanical properties of the rock mass and the detonation characteristics of the explosive. The methodology of research. Numerical modeling by the finite element method (FEM) to change the stress-strain state of the model established the value of the LLR at different diameters of the charge cavity, the pressure of explosion products and the tensile strength of rocks. Regression analysis obtained an empirical pattern of changes in the LLR depending on the physical and mechanical properties of the rock mass and the detonation characteristics of explosives. Mathematical modeling establishes analytical regularities of LLR calculation for zones of crack formation and intensive fragmentation. Findings. According to the change in the stress state of the model material around the charging cavity, the empirical regularity of changing the maximum value of the LLR depending on the diameter of the charging cavity and the diameter of the explosive charge, the density and rate of detonation of explosives, the compressive and shear strength. According to the developed calculation scheme, analytical regularities of LLR calculation for zones of crack formation and intensive fragmentation are obtained. By comparing the results of LLR calculation according to the obtained regularities, the most correct formula for LLR calculation was chosen, which turned out to be the analytical regularity of LLR calculation for the zone of intensive fragmentation. The originality. The power law is established for determining the LLR of an E, which comprehensively takes into account the radius of the crush zone, the diameter of the charging cavity and charge, the density and detonation velocity of E, the compressive strength of rocks, their fracturing and compaction under the action of rock pressure, which makes it possible to calculate the parameters of drilling and blasting (D&B) for breaking massif along the zone of intensive fragmentation. Practical implications. According to the results of the research, an analytical regularity of the calculation of the LLR of the explosive charge in the zone of intensive fragmentation was obtained, the use of which will allow to rationalize the D&B parameters in ore mining with the help of industrial explosives.","PeriodicalId":10466,"journal":{"name":"Collection of Research Papers of the National Mining University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90277029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Purpose. The purpose of study is a predictive assessment of stress-strain state of the "DTEK Ladyzhynska TPP" ash dump and changes in the hydrodynamic and hydrogeochemical modes within its location area in conditions of the designed reconstruction. The methodology. Comprehensive assessment of changes in hydrodynamic and hydrogeochemical modes around the ash dump site and defining the hydrogeomechanical stability of enclosing dams is performed based on the results of numerical modeling of groundwater flow and transport, and stress-strain state using the MODFLOW, PHASE2, and GEOSTUDIO software. Findings. The forecast of changes in hydrodynamic and hydrogeochemical modes around the ash dump site in accordance with the accepted ash dump reconstruction scheme is carried out based on the identified regularities of their formation. An assessment of the hydrogeomechanical stability of the enclosing dams in conditions of designed building up the third storey of the ash dump was performed based on the results of numerical simulation of the stress-strain state. Measures to increase the stability of the ash dump's enclosing dams under reconstruction are justified. The originality. New data were obtained regarding the nature of changes in hydrodynamic and hydrogeochemical modes around the ash dump under the conditions of its reconstruction. Measures to ensure stability of the hydrotechnical construction are substantiated in consequence of a comprehensive study of the stress-strain state of the material making up the enclosing dams, considering the predicted moisturizing of dam massif and the seismicity of the territory. Practical implications. The results of the performed research form the basis for substantiating technical decisions regarding ensuring the stability of hydrotechnical constructions of energy-generating enterprises.
{"title":"Comprehensive assessment the conditionsof Ladyzhynska TPP hydrotechnical constructions inaccordancewith theirreconstruction","authors":"V. Tymoshchuk, Y. Sherstiuk","doi":"10.33271/crpnmu/69.120","DOIUrl":"https://doi.org/10.33271/crpnmu/69.120","url":null,"abstract":"Purpose. The purpose of study is a predictive assessment of stress-strain state of the \"DTEK Ladyzhynska TPP\" ash dump and changes in the hydrodynamic and hydrogeochemical modes within its location area in conditions of the designed reconstruction. The methodology. Comprehensive assessment of changes in hydrodynamic and hydrogeochemical modes around the ash dump site and defining the hydrogeomechanical stability of enclosing dams is performed based on the results of numerical modeling of groundwater flow and transport, and stress-strain state using the MODFLOW, PHASE2, and GEOSTUDIO software. Findings. The forecast of changes in hydrodynamic and hydrogeochemical modes around the ash dump site in accordance with the accepted ash dump reconstruction scheme is carried out based on the identified regularities of their formation. An assessment of the hydrogeomechanical stability of the enclosing dams in conditions of designed building up the third storey of the ash dump was performed based on the results of numerical simulation of the stress-strain state. Measures to increase the stability of the ash dump's enclosing dams under reconstruction are justified. The originality. New data were obtained regarding the nature of changes in hydrodynamic and hydrogeochemical modes around the ash dump under the conditions of its reconstruction. Measures to ensure stability of the hydrotechnical construction are substantiated in consequence of a comprehensive study of the stress-strain state of the material making up the enclosing dams, considering the predicted moisturizing of dam massif and the seismicity of the territory. Practical implications. The results of the performed research form the basis for substantiating technical decisions regarding ensuring the stability of hydrotechnical constructions of energy-generating enterprises.","PeriodicalId":10466,"journal":{"name":"Collection of Research Papers of the National Mining University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78326960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
O. Kamyshatskyi, Y. Koroviaka, V. Rastsvietaiev, V. Yavorska, O. Dmytruk, T. Kaliuzhna
Purpose is to improve the technology of drilling mud by applying hydrodynamic cavitation. Research methodology is represented by the theoretical and experimental studies of hydrodynamic cavitation, performed with the help of modern methods of analytical analysis and experimental studies, i.e. by using general principles of mathematical and physical modeling, methods of processing research results in EXCEL, SolidWorks for further analysis. Research results. Frequency of cavitation oscillations according to the parameters of a device for creating hydrodynamic cavitation has been calculated. The formula for determining the dispersion time of the washing liquid material by the frequency of cavitation oscillations has been theoretically substantiated and obtained. A process of moving drilling fluid in the device using the appropriate software in the SolidWorks package has been studied. The results of theoretical research have been confirmed by practical research and chosen as a basis for substantiation and development of the methods for preparing drilling fluids. Originality is represented by modeling and research of the process of hydrodynamic cavitation in a cavitation device using flow visualization using SolidWorks software. This approach helped substantiate and predict the pressure and flow velocity at each point of transition of the diameters of a cavitation dispersant. This, in turn, has made it possible to reduce hydraulic resistance and improve the device design to implement a technology of preparation of drilling fluids due to hydrodynamic cavitation. This approach has allowed substantiating and performing virtual experiments on the technology of preparation of drilling fluids; that has helped select rational design parameters of the cavitation disperser and save a lot of money and time on the production of bench samples of the device, including various design features. Practical implications. Basing on the results of both theoretical and experimental studies, the development of advanced technology for the preparation of stable drilling fluids be applying rational indicators of hydrodynamic cavitation has been substantiated and proposed.
{"title":"On the issue concerning improvement of a mud preparation technology at the expense of hydrodynamic cavitation","authors":"O. Kamyshatskyi, Y. Koroviaka, V. Rastsvietaiev, V. Yavorska, O. Dmytruk, T. Kaliuzhna","doi":"10.33271/crpnmu/69.231","DOIUrl":"https://doi.org/10.33271/crpnmu/69.231","url":null,"abstract":"Purpose is to improve the technology of drilling mud by applying hydrodynamic cavitation. Research methodology is represented by the theoretical and experimental studies of hydrodynamic cavitation, performed with the help of modern methods of analytical analysis and experimental studies, i.e. by using general principles of mathematical and physical modeling, methods of processing research results in EXCEL, SolidWorks for further analysis. Research results. Frequency of cavitation oscillations according to the parameters of a device for creating hydrodynamic cavitation has been calculated. The formula for determining the dispersion time of the washing liquid material by the frequency of cavitation oscillations has been theoretically substantiated and obtained. A process of moving drilling fluid in the device using the appropriate software in the SolidWorks package has been studied. The results of theoretical research have been confirmed by practical research and chosen as a basis for substantiation and development of the methods for preparing drilling fluids. Originality is represented by modeling and research of the process of hydrodynamic cavitation in a cavitation device using flow visualization using SolidWorks software. This approach helped substantiate and predict the pressure and flow velocity at each point of transition of the diameters of a cavitation dispersant. This, in turn, has made it possible to reduce hydraulic resistance and improve the device design to implement a technology of preparation of drilling fluids due to hydrodynamic cavitation. This approach has allowed substantiating and performing virtual experiments on the technology of preparation of drilling fluids; that has helped select rational design parameters of the cavitation disperser and save a lot of money and time on the production of bench samples of the device, including various design features. Practical implications. Basing on the results of both theoretical and experimental studies, the development of advanced technology for the preparation of stable drilling fluids be applying rational indicators of hydrodynamic cavitation has been substantiated and proposed.","PeriodicalId":10466,"journal":{"name":"Collection of Research Papers of the National Mining University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87417219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Y. Rudniev, M. Antoshchenko, E. Filatieva, M. Filatiev
Purpose. To improve the regulatory framework for the safe conduct of mining operations, to establish the effect of mineral impurities and moisture on the accuracy of determining the oxygen content, under conditions close to those of coal seams. Methodology is based on the fact that practically for all coal seams of Donbass and the Lvov-Volyn basin indicators of consumer qualities of solid fuels have been established, but they characterize only one organic (combustible) part per dry ash-free state. In this case, the effect of mineral impurities (their content for many reservoirs exceeds 30-40%) and moisture on the change in oxygen content is not taken into account. The manifestation of many hazardous properties of coal seams depends on the ratio of oxygen content with other components of the organic mass and mineral impurities. To bring the quality indicators of coals to a state close to the conditions of mining operations, they were recalculated for each coal seams, taking into account the actual yield of ash and total moisture. Findings. The indicator of the release of volatile substances used in the normative documents for the safe conduct of mining operations for assessing the metamorphic transformations of coal seams does not determine the type of coal by their reduction. Restorability determines the properties of the organic mass based on the ratio of oxygen to its other main components. In addition to the organic mass in the dry ash-free state, the composition of solid fuels includes mineral impurities and moisture. They significantly affect the change in the ratio between the main components. The carbon content in the organic (combustible) mass is more informative in comparison with the yield of volatile substances, an indicator. It functionally controls the sum of the remaining components - hydrogen, nitrogen, sulfur and oxygen. To a lesser extent, but rather high, the closeness of the correlation interdependence was established between the content of oxygen and carbon in the dry ash-free state of the fuel. Such interdependence is completely eliminated when considering the fuel for its working condition, which indicates the random nature of the relationship between the main components of the organic mass and mineral impurities, including moisture, for each considered coal seams. Originality. For the first time, on the basis of statistical processing of experimental data on the quality of coals for almost all coal seams of the Donbass and the Lviv-Volyn basins, the possible limits of the oxygen content for the working state of the fuel were established, which makes it possible to individually consider for each coal seam the ratio between the main components of the organic mass and mineral impurities, including the presence of moisture. Practical implications. The research results make it possible to develop proposals for improving the regulatory framework in terms of predicting the hazardous properties of coal seams during mining operation
{"title":"Influence of oxygen content on the manifestation of hazardous properties of coal seams","authors":"Y. Rudniev, M. Antoshchenko, E. Filatieva, M. Filatiev","doi":"10.33271/crpnmu/69.071","DOIUrl":"https://doi.org/10.33271/crpnmu/69.071","url":null,"abstract":"Purpose. To improve the regulatory framework for the safe conduct of mining operations, to establish the effect of mineral impurities and moisture on the accuracy of determining the oxygen content, under conditions close to those of coal seams. Methodology is based on the fact that practically for all coal seams of Donbass and the Lvov-Volyn basin indicators of consumer qualities of solid fuels have been established, but they characterize only one organic (combustible) part per dry ash-free state. In this case, the effect of mineral impurities (their content for many reservoirs exceeds 30-40%) and moisture on the change in oxygen content is not taken into account. The manifestation of many hazardous properties of coal seams depends on the ratio of oxygen content with other components of the organic mass and mineral impurities. To bring the quality indicators of coals to a state close to the conditions of mining operations, they were recalculated for each coal seams, taking into account the actual yield of ash and total moisture. Findings. The indicator of the release of volatile substances used in the normative documents for the safe conduct of mining operations for assessing the metamorphic transformations of coal seams does not determine the type of coal by their reduction. Restorability determines the properties of the organic mass based on the ratio of oxygen to its other main components. In addition to the organic mass in the dry ash-free state, the composition of solid fuels includes mineral impurities and moisture. They significantly affect the change in the ratio between the main components. The carbon content in the organic (combustible) mass is more informative in comparison with the yield of volatile substances, an indicator. It functionally controls the sum of the remaining components - hydrogen, nitrogen, sulfur and oxygen. To a lesser extent, but rather high, the closeness of the correlation interdependence was established between the content of oxygen and carbon in the dry ash-free state of the fuel. Such interdependence is completely eliminated when considering the fuel for its working condition, which indicates the random nature of the relationship between the main components of the organic mass and mineral impurities, including moisture, for each considered coal seams. Originality. For the first time, on the basis of statistical processing of experimental data on the quality of coals for almost all coal seams of the Donbass and the Lviv-Volyn basins, the possible limits of the oxygen content for the working state of the fuel were established, which makes it possible to individually consider for each coal seam the ratio between the main components of the organic mass and mineral impurities, including the presence of moisture. Practical implications. The research results make it possible to develop proposals for improving the regulatory framework in terms of predicting the hazardous properties of coal seams during mining operation","PeriodicalId":10466,"journal":{"name":"Collection of Research Papers of the National Mining University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74369974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Purpose. Creation of operational determination methodology of mechanical and liquid deposit zones in deformed sections of mine degassing gas pipelines to prevent the process of hydrate formation and increase their throughput. Research methodology. The peculiarities of monitoring the technical condition of mine degassing systems (MDS), as well as a methodical support for operational control of their formation zones in the mine environment real conditions, are considered. Approaches to assessment, control and forecasting methods of gas hydrate formation zones under the influence of mine environment specific factors were determined and innovative technical solutions were developed to increase the degassing system throughput. Findings. Based on the results of modern trends assessment in the field of monitoring and forecasting gas hydrate formation zones, it was established that a fundamentally new approach to ensuring the accident-free operation of pipeline transport is being implemented in foreign practice. Originality. Grounded innovative technical solutions for existing degassing systems modernization to increase the throughput capacity of mine pipelines and predict the formation zones of crystalline gas hydrates during transporting methane-air mixture from wells to vacuum pumping stations. Practical implications. A program and methodology for monitoring and diagnosing mine degassing gas pipelines have been developed using innovative technical solutions to promptly determine the gas hydrate formation places and increase throughput during the current operation.
{"title":"Monitoring and operational control of the gas hydrates formation in gas degassing pipelines","authors":"L. Shyrin, R. Yehorchenko, V. Taran","doi":"10.33271/crpnmu/69.243","DOIUrl":"https://doi.org/10.33271/crpnmu/69.243","url":null,"abstract":"Purpose. Creation of operational determination methodology of mechanical and liquid deposit zones in deformed sections of mine degassing gas pipelines to prevent the process of hydrate formation and increase their throughput. Research methodology. The peculiarities of monitoring the technical condition of mine degassing systems (MDS), as well as a methodical support for operational control of their formation zones in the mine environment real conditions, are considered. Approaches to assessment, control and forecasting methods of gas hydrate formation zones under the influence of mine environment specific factors were determined and innovative technical solutions were developed to increase the degassing system throughput. Findings. Based on the results of modern trends assessment in the field of monitoring and forecasting gas hydrate formation zones, it was established that a fundamentally new approach to ensuring the accident-free operation of pipeline transport is being implemented in foreign practice. Originality. Grounded innovative technical solutions for existing degassing systems modernization to increase the throughput capacity of mine pipelines and predict the formation zones of crystalline gas hydrates during transporting methane-air mixture from wells to vacuum pumping stations. Practical implications. A program and methodology for monitoring and diagnosing mine degassing gas pipelines have been developed using innovative technical solutions to promptly determine the gas hydrate formation places and increase throughput during the current operation.","PeriodicalId":10466,"journal":{"name":"Collection of Research Papers of the National Mining University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88858988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Purpose. The purpose of the work is to carry out an analytical review of the state of the electricity system of Ukraine and its structure by types of generation from the point of view of its balancing. Research methodology. To establish the dependence of the Ukrainian energy market on constant loads and maneuverability, an empirical method of analyzing the indicators of the energy system was used. The results. The analysis of the state of the electric power system of Ukraine, taking into account its changes during the military aggression, was carried out. The structure of the electric power sector of the economy by types of generation is shown, the disadvantages and advantages from the point of view of balancing the electric power system of Ukraine are revealed. According to the results, the need for additional maneuvering of the power system was revealed, which can also be performed due to the accumulation of electricity generated at non-traditional energy facilities. Scientific novelty. Analysis of the state of Ukraine's electric power industry in modern conditions allows us to distinguish the main directions of research on increasing the maneuverability of the electric power system when renewable energy sources are connected to this system. Practical value. The last 10 years have seen a large-scale increase in demand for the integration of information technologies into society. The development of industry, large-scale automation, cybernetic technologies and others make it possible to use a large number of technological gifts in general use - gadgets, computers, electric cars, industrial objects, etc. Which in turn are consumers of electricity. Electricity consumption increases every year by an average of 2-5%, and the outdated approach to taking the necessary measures to re-equip the power grid in Ukraine may lead to a collapse in the energy sector in the next 3-5 years. Also, the search for a solution to this problem led initially to the widespread use of renewable energy sources, such as solar power plants, and only later to the transformation of the energy sector, the introduction of decentralization, etc. In order to maintain the balancing of the energy system, along with the development of renewable energy, the task of developing accumulative systems, in particular hydro and pneumatic accumulative stations, which can play an important role in the permanent energy system of Ukraine as a type of fast-maneuvering power, arises.
{"title":"Overview of the state of electrical energy in Ukraine","authors":"Ya Yaroshenko, O. Bobrov, D. Tsyplenkov","doi":"10.33271/crpnmu/69.193","DOIUrl":"https://doi.org/10.33271/crpnmu/69.193","url":null,"abstract":"Purpose. The purpose of the work is to carry out an analytical review of the state of the electricity system of Ukraine and its structure by types of generation from the point of view of its balancing. Research methodology. To establish the dependence of the Ukrainian energy market on constant loads and maneuverability, an empirical method of analyzing the indicators of the energy system was used. The results. The analysis of the state of the electric power system of Ukraine, taking into account its changes during the military aggression, was carried out. The structure of the electric power sector of the economy by types of generation is shown, the disadvantages and advantages from the point of view of balancing the electric power system of Ukraine are revealed. According to the results, the need for additional maneuvering of the power system was revealed, which can also be performed due to the accumulation of electricity generated at non-traditional energy facilities. Scientific novelty. Analysis of the state of Ukraine's electric power industry in modern conditions allows us to distinguish the main directions of research on increasing the maneuverability of the electric power system when renewable energy sources are connected to this system. Practical value. The last 10 years have seen a large-scale increase in demand for the integration of information technologies into society. The development of industry, large-scale automation, cybernetic technologies and others make it possible to use a large number of technological gifts in general use - gadgets, computers, electric cars, industrial objects, etc. Which in turn are consumers of electricity. Electricity consumption increases every year by an average of 2-5%, and the outdated approach to taking the necessary measures to re-equip the power grid in Ukraine may lead to a collapse in the energy sector in the next 3-5 years. Also, the search for a solution to this problem led initially to the widespread use of renewable energy sources, such as solar power plants, and only later to the transformation of the energy sector, the introduction of decentralization, etc. In order to maintain the balancing of the energy system, along with the development of renewable energy, the task of developing accumulative systems, in particular hydro and pneumatic accumulative stations, which can play an important role in the permanent energy system of Ukraine as a type of fast-maneuvering power, arises.","PeriodicalId":10466,"journal":{"name":"Collection of Research Papers of the National Mining University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79496465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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