Collection of Research Papers of the National Mining University最新文献

{"title":"Problems of waste rock formation during mining of Western Donbass coal reserves: state-of-the-art and solutions","authors":"M. Petlovanyi, K. Sai, O. Stoliarska","doi":"10.33271/crpnmu/71.079","DOIUrl":"https://doi.org/10.33271/crpnmu/71.079","url":null,"abstract":"Purpose. The research purpose is to analyze and generalize the problems of waste rock accumulation, as well as to determine the directions for their possible solution in order to improve the ecological-economic conditions for mining coal reserves in the Western Donbass. Methods. A comprehensive scientific-methodological approach is used, which consists in studying regional accounts on the state of the environment, data from the register of waste disposal sites in the Dnipropetrovsk Oblast, peculiarities of placement of dumps according to the Google Earth program and collected mine data. To study the feasibility of processing dumps, a SWOT-analysis is used, as well as the analysis of existing technologies for processing the rock mass from waste dumps, based on foreign and domestic experience. Findings. Nine rock dumps have been identified, formed as a result of the functioning of the Western Donbass coal mines, where almost 130 million tons of waste rocks have been accumulated on an area of about 190 hectares. It is noted that the reclamation of disturbed lands as the main means of rock utilization is insufficient. Based on a thorough analysis of the SWOT-analysis results, a strategic direction for processing has been determined – the use of rock mass as a raw material for construction (materials and roads) with accompanying extraction of coal, aluminum and iron. The existing technologies for the processing of waste rocks have been systematized. It has been determined that the largest scaling of waste dump processing in the Western Donbass mines can be achieved with a combination of mechanical-chemical methods, among which gravity and magnetic beneficiation methods, mechanical grinding and chemical leaching are priority. Originality. The mechanisms for handling coal waste from coal mines in the Western Donbass have been determined to solve ecological-economic problems associated with their accumulation. Practical implications. The research results reveal possible ways of solving the problems of waste rock accumulation in the Western Donbass mines, which makes ecological and economic sense.","PeriodicalId":10466,"journal":{"name":"Collection of Research Papers of the National Mining University","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90499132","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":"Methods of creating a conveyor lift route in a deep pit","authors":"O. Аnisimov, O. Ivanyk","doi":"10.33271/crpnmu/71.029","DOIUrl":"https://doi.org/10.33271/crpnmu/71.029","url":null,"abstract":"Purpose. Improving the technology of stripping and schemes for creating a steep trench in a deep pit makes it possible to create new cargo flows and develop mining operations. The purpose of the research work is to determine a more attractive scheme for the formation of the conveyor route. The paper compares two technological schemes: the creation of a steep half-trench to the lower horizons with the hilling of rocks and the formation of a working in the rocks in the form of a trench. The above purpose of the work is to substantiate an effective scheme for creating a steep trench for the subsequent placement of a conveyor stack on its base. This will allow moving the rock mass from the lower horizons to the upper ones at a lower cost. The considered schemes for creating the steep trench allowed it possible to determine the volume of preparatory work, the most attractive scheme for creating an inclined working during opening lower horizons in the conditions of the operating open pit of Poltava GOK, which makes it possible to reduce the use of dump trucks inside the open pit. The methods. The method of vertical sections was used for the calculation of the volumes of run-off-mine during the formation of the trench. A geographic information system (GIS), and a software package K-MINE was used for research. The method of comparing the scope of work and creating a conveyor route by options allowed to determine the most appropriate way of doing work. Findings. The parameters of a steep trench and half-trench were studied, including the established scope of work within the steep layers of the western side of the PGOK open pit. Opening with steep trenches allows for the placement of an existing elevator with the placement of a crushing and transfer station containing a mobile crusher from KRUPP. Implementing the scheme with a steep trench in the rocks, the scope of work is 79.555 thousand m3. For the construction of a half-trench, the amount of work is 733,887 thousand m3. Building capital trenches and semi-tranches in the conditions of the open pit of the Poltava Mining and Processing Plant, preference is given to semi-trenches, which are created from rocks (without drilling and blasting). The originality. The options and parameters for creating steep trenches for further placement of a conveyor stack on its base are considered. The scheme for moving the rock mass from the lower horizons to the upper ones has been improved, graphical dependencies of the scope of work have been established, and a comparison of technical indicators has been made for creating a steep trench and a half-trench. Practical implimintation. The considered schemes for creating a steep trench allowed to determine the volume of preparatory work, to establish the most attractive scheme for the creation of an inclined work in opening the lower horizons in the conditions of the active open pit of the Poltava GOK, what makes it possible to reduce the use of dump trucks inside the open p","PeriodicalId":10466,"journal":{"name":"Collection of Research Papers of the National Mining University","volume":"934 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77563176","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":"Analysis of technological approaches and development experience of Kryvbass tailings","authors":"S. Joukov, Ju Hryhoriev, S. Lutsenko","doi":"10.33271/crpnmu/71.053","DOIUrl":"https://doi.org/10.33271/crpnmu/71.053","url":null,"abstract":"Purpose. Complication of the conditions of conducting open-pit mining operations and complex external factors will certainly lead to the deterioration of technical and economic indicators of deposit development in the future. The complex development of deposits is one of the promising options for correcting this situation, and the purposeful formation and development of man-made deposits is the main way of expanding the mineral and raw material base of Kryvbas. The purpose of this work is to generalize the experience of developing Kryvbas tailings and theoretical approaches to the formation of schemes for complex mechanization of their processing for the further creation of a scientific basis for the expansion of the raw material base of the Kryvorizka mining complex. Methodology. The work uses the methods of analysis and synthesis of literary sources of information when assessing the state of complex development of deposits in the Kryvyi Rih region, retrospective analysis of project decisions regarding PRJSC \"Central GZK\", engineering analysis - when assessing the schemes of complex mechanization of tailings storage facility. Results. The analysis of scientific sources was carried out and the state of complex development of deposits of Kryvbas was assessed. Accumulated volumes of magnetite quartzite dressing waste have been determined. The experience of the development of man-made deposits of the alluvial type was analyzed, during the design analysis the most appropriate schemes of complex mechanization and the parameters of the tailings storage development system were identified. Scientific novelty. The conducted retrospective and engineering analysis of design solutions made it possible to identify the most effective schemes for complex mechanization of tailings disposal. As the most expedient in the conditions of PRSC \"Central GZK\" was chosen a scheme using a dredger with subsequent transportation of man-made raw materials to the pulp farm. Practical significance. The results of the performed research can be used by design organizations and mining enterprises when designing the formation and development of tailings storage facilities.","PeriodicalId":10466,"journal":{"name":"Collection of Research Papers of the National Mining University","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84958975","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":"Study of colour change factors for some varieties of gems","authors":"S. Shevchenko, I. Tkachuk","doi":"10.33271/crpnmu/71.170","DOIUrl":"https://doi.org/10.33271/crpnmu/71.170","url":null,"abstract":"Purpose. To explain the main factors of color transformations on specific samples of precious stones with a change in color, as well as their synthetic analogues and imitations. Methods. The work uses X-ray fluorescence analysis, as well as general scientific methods of research –empirical and theoretical (analysis, generalization, comparison, explanation). During the research, lamps with different light spectra (different color temperatures) were used: an incandescent lamp, a yellow diode lamp, a special gemological lamp. Findings. The content and concentration of chromophore ions were determined for samples of precious stones and their imitations with color changes, namely alexandrite, chrysoberyl, sultanite, Malaya garnet, garnets with color changes, as well as synthetic corundum and alexite (glass). The influence of the concentration ratio of chromophore ions on the color of alexandrites and garnets with color change is shown. Color change for anisotropic stones with pleochroism is shown. The colors of anisotropic stones along the crystallographic axes were studied –two colors for uniaxial stones and three – for biaxial stones. The originality. The change in color of the studied samples from the department's collection under the influence of four sources of illumination: daylight, an incandescent lamp, a yellow diode lamp, and a special gemological lamp was demonstrated. Chromatic charts are constructed with different color temperatures and wavelengths for each light source. It is shown that when the color temperature of light sources increases, the wavelengths of light in all samples, except for alexandrite, decrease. Practical implementation. The data presented in the article demonstrate specific examples of the influence of factors on the change in the color of precious stones and provide an opportunity for additional explanations of this phenomenon for specialists, as well as expand its understanding by direct consumers of relevant services on the market. It is shown that with the gradual replacement of incandescent lamps with modern diode lamps, garnets with color changes and synthetic corundum \"under alexandrite\" will be in the most \"losing\" situation - their colors will be closer to each other and will hardly show strong changes. At the same time, such an artificial material as alexite (which is passed off as sultanite, in particular) will attract the attention of even uninformed buyers due to a sharp change in color, while the colors will almost match under such opposite sources as daylight and an incandescent lamp.","PeriodicalId":10466,"journal":{"name":"Collection of Research Papers of the National Mining University","volume":"76 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91393343","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":"To the issue of underground gasification of low-thickness unconditioned coal reserves","authors":"P. Saik, V. Lozynskyi, D. Malachkevych, O. Cherniaіeva","doi":"10.33271/crpnmu/71.091","DOIUrl":"https://doi.org/10.33271/crpnmu/71.091","url":null,"abstract":"Purpose. Formation of an innovative approach in the rational development of low-thickness unconditioned coal reserves with the establishment of their suitability for underground gasification technology and the study of mass and heat indicators of the gasification process on the example of the mine of PJSC \"DTEK Pavlohradvuhillia\" named after Heroiv Kosmosu. Methods. The possibility of implementing the technology of in situ underground coal gasification was based on analytical studies. On the basis of the work developed by the professor of the Department of Mining Engineering and Education of \"Dnipro University of Technology\" Dychkovskyi R.O \"Methods for assessing the suitability of reserves for underground coal gasification\" established the general coefficient of the suitability of coal reserves for gasification located within the minefield named after Heroiv Kosmosu and are promising for future development. The output parameters of combustible and ballast generator gases, and the chemical and energy efficiency of the gasification process were studied using the \"MTB SPGV\" software, which passed industrial approval both during laboratory and field tests. Findings. Current issues related to the application of a combination the technologies for the development of low-thickness non-conditional coal reserves, which allow significantly extend the life of the mining enterprise, are highlighted. In particular, after working out the productive areas of coal reserves, the orientation of production is aimed at the processing of reserves at the place of their occurrence by underground gasification technology. Criteria for the suitability of coal reserves were established, which allowed the establishment of the priority of coal seams gasification. Based on the change in the parameters of the fuel mixture, the output of combustible and ballast generator gases was investigated. Originality. It was established that when air and oxygen-enriched blowing is supplied to the underground gas generator, the output volume of combustible generator gases remains the same, the difference lies in the concentration of these gases in the initial mixture. This is due to the high content of nitrogen during air blowing, which does not enter into a chemical reaction with coal, and at temperatures in the reaction channel below 900°C, the output of CO decreases by 25-46%. Practical implications. The conditions of the mine named after Heroiv Kosmosu defined criteria for the suitability of coal for gasification. Two coal seams of the mine c12 and c7top are in conditions of sufficient suitability for underground coal gasification.","PeriodicalId":10466,"journal":{"name":"Collection of Research Papers of the National Mining University","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86037423","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 and synthesis of the automatic water level control system of the mine water tank according to the criterion of minimizing the dispersion of fluctuations of power consumption","authors":"A. Bublikov, M. Isakova, V. Nadtochyi, D. Zybalov, Yuliya Halchenko, M. Khoroshailov","doi":"10.33271/crpnmu/70.146","DOIUrl":"https://doi.org/10.33271/crpnmu/70.146","url":null,"abstract":"Practical value. The synthesis method is proposed for the system of automatic control of the water level in the mine reservoir based on the introduction of expert rules, thanks to which the variance of fluctuations in the total power of the pump engines is minimized. Reducing the variance of the change in power over time increases the predictability of the amount of energy consumed for pumping water, and also reduces the amount of time when a significantly increased total power of the pump drives is observed. This makes it possible to reduce specific energy costs for water pumping using the differentiated approach when calculating the cost of electricity.","PeriodicalId":10466,"journal":{"name":"Collection of Research Papers of the National Mining University","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78925375","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":"Estimation of pollution zones from emissions of industrial enterprises","authors":"T. Rusakova, O. Zolotko, O. Dolzhenkova, Y. Voitenko","doi":"10.33271/crpnmu/70.182","DOIUrl":"https://doi.org/10.33271/crpnmu/70.182","url":null,"abstract":"","PeriodicalId":10466,"journal":{"name":"Collection of Research Papers of the National Mining University","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80001765","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 and synthesis of the automatic temperature control system of the heat mediumin the cooking boiler for the manufacture of fruit jam","authors":"A. Bublikov, M. Isakova, V. Nadtochyi, D. Zybalov, Yuliya Halchenko, M. Khoroshailov","doi":"10.33271/crpnmu/70.157","DOIUrl":"https://doi.org/10.33271/crpnmu/70.157","url":null,"abstract":"","PeriodicalId":10466,"journal":{"name":"Collection of Research Papers of the National Mining University","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88906597","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":"Economical-ecological efficiency of usingemulsion explosive in underground ore mining","authors":"M. Kononenko, O. Khomenko, I. Myronova, I. Kovalenko","doi":"10.33271/crpnmu/70.022","DOIUrl":"https://doi.org/10.33271/crpnmu/70.022","url":null,"abstract":"","PeriodicalId":10466,"journal":{"name":"Collection of Research Papers of the National Mining University","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89297764","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":"Features of the construction of a collector network in difficult topographic conditions by microtunnel","authors":"N. Zuievska, O. Vovk, L. Shaidetska, E. Shukurlu","doi":"10.33271/crpnmu/70.057","DOIUrl":"https://doi.org/10.33271/crpnmu/70.057","url":null,"abstract":"","PeriodicalId":10466,"journal":{"name":"Collection of Research Papers of the National Mining University","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85599436","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}