JOURNAL of Donetsk mining institute最新文献

{"title":"ENHANCING ELECTRICAL SAFETY OF THE MECHANICAL PRESS OPERATOR AT A REFRACTORY PRODUCTION","authors":"S. Podkopaev, S. Zhovtobrukh","doi":"10.31474/1999-981x-2019-2-85-92","DOIUrl":"https://doi.org/10.31474/1999-981x-2019-2-85-92","url":null,"abstract":"","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131967280","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":"DEVELOPMENT AND APPLICATION OF THE BEARING-BOLT SUPPORTING TECHNOLOGY IN THE CONDITIONS OF UKRAINIAN COAL MINES","authors":"O. Krukovskyi, V. Krukovska, L. Adorska, Yu.Yu. Bulich","doi":"10.31474/1999-981x-2022-2-54-66","DOIUrl":"https://doi.org/10.31474/1999-981x-2022-2-54-66","url":null,"abstract":"Purpose. To substantiate the parameters of formation of elements in the roof-bolting construction and to establish the dependence of displacements of the mine working contour on the technological parameters of mine working driving and supporting for development of the bearing-bolt supporting technology in the conditions of Ukrainian coal mines. Research methods. To study the process of changing the stress state of host rocks around the mine working during the technological cycle of setting of roof bolts, a mathematical elastoplastic model was developed. This model takes into account roof bolts parameters, mining parameters, rock properties, as well as the time and place of the start of roof bolting. The problem was solved using the finite element method. The methods of researching the state of the rock around the mine working with roof bolts, which were developed by the authors, were used during the calculations. Results. The mechanism of formation of a rock-bolt support and a reinforced arch in the mine roof was studied. The conditions and parameters of formation of the following elements in the roof-bolting construction are substantiated: load-bearing and backing-up parts of the arch, supports of the arch, a base of the structure and protective “bridges”. Numerical simulation of the stress-strain state of the host rocks was completed when various elements of the roof-bolting construction were used. Graphs of the relative heaving of the mine work floor were constructed. In order to study the influence of the speed of the mine working advance and the distance between the first row of bolts and the mine working face on the mine working stability, simulations were performed for various technological schemes. The dependence of changes in roof displacements on these technological parameters was obtained: decreasing the distance between the first row of bolts and the mine face and increasing the speed of the mine working advance lead to a decrease in rock displacements and an increase in the stability of the mine working. Scientific novelty. A new method of calculating the parameters of the stress state of the host rock and the roof-bolting construction during the technological cycles of bolts setting was developed. This method takes into account that during each cycle the host rock is unloading from the rock pressure and that the bolts start to work at a certain point in time. Methods of erecting roof-bolting constructions using various elements were developed and confirmed by patents. Practical significance. The use of roof-bolting constructions in 52 mines of Ukraine made it possible to achieve a stable state of mine workings in difficult mining and geological conditions and to obtain a great economic effect due to the reduction of costs for operation and repair of mine workings.","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123572867","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":"THE WAYS TO IMPROVE WORK SAFETY IN COAL MINES IN AN UNSTABLE ENVIRONMENT","authors":"Boris Kobylyansky","doi":"10.31474/1999-981X-2019-2-66-74","DOIUrl":"https://doi.org/10.31474/1999-981X-2019-2-66-74","url":null,"abstract":"","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123878845","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":"TECHNOLOGICAL SCHEME OF THE DEVICE OF THE IRRIGATION OF THE LIMESTONE SUSPENSION OF THE CONSOLE DEPOSITOR DSR 8000100","authors":"I. Chobotko, S. Tynyna, V. Franchuk","doi":"10.31474/1999-981x-2019-1-138-144","DOIUrl":"https://doi.org/10.31474/1999-981x-2019-1-138-144","url":null,"abstract":"","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125764287","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":"INFLUENCE OF ANALYSIS RESULTS OF ANALYTICAL COAL SAMPLES ON THE PREDICTION ACCURACY OF HAZARDOUS PROPERTIES OF COAL SEAMS","authors":"Y. Rudniev, V. Galchenko, E. Filatieva, M. Filatiev","doi":"10.31474/1999-981x-2021-2-176-186","DOIUrl":"https://doi.org/10.31474/1999-981x-2021-2-176-186","url":null,"abstract":"Purpose: to establish possible quantitative errors in determining the values of some indicators of the degree of metamorphism without attracting the content of total moisture and mineral impurities to predict the hazardous properties of coal mine layers during mining. Methodology: based on the use of initial data on the quality indicators and properties of coals for specific coal seams, given in the reference sources, with the subsequent recalculation of the state of samples from their dry ashless or ashless state to the raw state. Comparison of the samples of indicators were determined, respectively, using analytical samples and based on the results of recalculation to the initial state (close to the production state), conclusions were drawn about possible errors in the case of using the analysis results of the analytical samples to predict hazardous properties of mines. Results: The analytical state of the samples for dry ashless state (daf) or wet ashless state (af) does not correspond to the state of coal in the working area of mining operations (r), which most accurately characterizes the manifestation of mine hazardous properties. The indicators of the release of volatile substances during thermal decomposition of coals, which are used to predict the hazardous properties of mine coal seams, do not directly reflect changes in the elemental composition of coals during metamorphic transformations. Methods for preparing analytical samples provide for grinding to small fractions, removing external moisture and enriching to ash content less than 10%, which does not correspond to the state of coal (r) in the mining area. The use of indicators set for dry ashless combustible (organic) mass excludes the possibility of analyzing the influence of moisture and mineral impurities on the manifestation of the hazardous properties of coal seams. The use of such indicators to predict the hazardous properties of mine coal seams can lead to errors in their determination of 45 ÷ 50%. The hazardous properties of coal seams can be adequately characterized only by the combined composition and properties of organic matter and mineral impurities in a state close to the presence of coal in the mining area. Using the example of possible significant errors in the calorific value, in the case of its use to characterize the hazardous properties of coal mine seams, the expediency of scientific substantiation of a set of indicators for a reliable forecast of a specific hazardous property for a specific seam formation was proved. Scientific novelty: hazardous properties of coal seams are reliably predicted on the basis of the composition and properties of organic and mineral components, reduced to conditions close to the state during mining operations. Practical value: the results obtained give grounds to scientifically substantiate the selection of the necessary indicators for predicting a specific hazardous property of coal seams and make proposals for improving the regu","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117183295","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":"CALCULATION OF PRODUCTION RISK FROM NOISE POLLUTION FOR THE SAFETY OF WORKERS IN THE OPEN AIR","authors":"O. Voloshkina, Anastasiіa Kovalоva","doi":"10.31474/1999-981x-2021-2-104-112","DOIUrl":"https://doi.org/10.31474/1999-981x-2021-2-104-112","url":null,"abstract":"Purpose. Studying the impact of noise pollution levels at the busiest intersections of Kyiv and determining the exceedances of normative values on the basis of national and international standards. Calculation of the probability of hearing loss under conditions of prolonged exposure to noise on the body of 40-year-old and 50-year-old workers during 30 years of service. Methods. In this paper, based on the obtained field measurement data, noise pollution on the main highways of Kyiv is analyzed. Topicality. The research is aimed at ensuring the safety of operating transport services and construction companies from the constant noise load, which creates traffic flows in the city and leads to occupational diseases. Studies have shown that at an 8-hour exposure in a worker under conditions of constant chronic noise load, there may be a shift in the audibility threshold depending on age and length of service. The method recommended by the international standard ISO1999 / 2013 can be used to determine the corrected level of noise pollution and safety of workers in the open air during the repair of highway overpasses. The scientific novelty lies in the determination of natural data on the noise load on the example of some of the busiest road junctions in Kyiv, where transport mainly moves at low speed and stands in traffic jams. The obtained average data during the working day indicate a noise load that is 18-20% higher than the normative value of workers working outdoors (80 dBA). Based on basic calculations of the probability of hearing loss because of noise pollution at an average level of 90 dBA for workers with 30 years of experience proved the need for enhanced software monitoring in areas of increased noise pollution for production sites and protection of workers for their safety. Practical significance. The research results are aimed at providing safety for workers outdoors during the repair of highways in large cities and on construction sites near major intersections. The importance of the work lies in the need to strengthen the existing dynamic control over working conditions and health of workers in the open air in the conditions of constant noise load of the city and the need to revise the requirements to the employer governing the protection of workers from noise. The research results showed that the maximum value of noise pollution in Kyiv near the main roads during the day is within the range of 87-94dBa, which is on average 11% higher than the normative value for open production sites. The probability of hearing loss of workers due to noise is 11.5% for 50-year-olds and 7% for 40-year-old workers with 30 years of service.","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124572777","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 ECOLOGICAL RISKS ASSESSMENT AT MINING ENTERPRISES OF CENTRAL DONBAS REGION PRONE TO FLOODING","authors":"O. Lunova","doi":"10.31474/1999-981x-2019-2-93-103","DOIUrl":"https://doi.org/10.31474/1999-981x-2019-2-93-103","url":null,"abstract":"","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120856595","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":"OBSERVATION OF THE STATE OF WORKINGS AT THE LONGWALL ADVANCING ON THE STRIKE","authors":"S. Nehrii, Serhii Zhyvohliad, T. Nehrii, State Enterprise «Mine to them. Surgai»","doi":"10.31474/1999-981x-2019-2-16-27","DOIUrl":"https://doi.org/10.31474/1999-981x-2019-2-16-27","url":null,"abstract":"","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"163 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132464775","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 EXPEDIENCE OF GLASS-PLASTIC AND BASALT-PLASTIC RODS APPLICATION FOR REINFORCEMENT OF STONE PRODUCTS","authors":"V. Kotenko, S. Bashinsky, Ihor Piskun","doi":"10.31474/1999-981x-2022-1-47-55","DOIUrl":"https://doi.org/10.31474/1999-981x-2022-1-47-55","url":null,"abstract":"Purpose. The purpose of this work is to study the feasibility of using different types of composite materials for natural stone products reinforcement by comparing their strength characteristics. Methodology. Recommendations for the preparation of samples for strength research have been implemented and described. Recommendations for the preparation, adjustment and commissioning of fixed assets and materials used in the study are given. The constituent elements of the experiment aimed at determining the strength characteristics of the samples are developed and described. Based on the results of the obtained data, the values of the basic strength parameters during the destruction of the samples under the action of bending loads have been calculated. Results. The study of the technology of stone products reinforcement allows solving a number of problems related to improving the quality and competitiveness of stone manufacturing. A holistic and scientifically sound study of reinforcement technology allows an array of empirical data and developing the optimal order of its use. Scientific novelty. Systematization and review of existing methods of natural stone products reinforcement are performed and methods of their optimization with the help of modern composite materials are offered. The expediency of using fiberglass and basalt-plastic composite materials for the purpose of reinforcing stone products has been empirically investigated. The expediency of using fiberglass and basalt-plastic composite materials for natural stone products reinforcement by comparing the obtained values of strength characteristics has been substantiated. Practical significance. The practical significance of the obtained results lies in the possibility of their application in order to simplify, modernize and improve the technology of stone products reinforcement for its widespread introduction as one of the basic technologies in the conditions of stone processing enterprises. However, the research results confirm the fact of the expediency of using composite reinforcement (especially basalt-plastic) to improve the strength properties of stone products.","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131314393","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":"JUSTIFICATION OF METHODS AND TECHNIQUES FOR THE ELIMINATION OF SELF-DISPOSAL OF MINING WASTE","authors":"I. Chobotko","doi":"10.31474/1999-981x-2022-1-166-171","DOIUrl":"https://doi.org/10.31474/1999-981x-2022-1-166-171","url":null,"abstract":"Purpose. To analyse the processes of spontaneous combustion of mining waste, too study the impact of waste combustion on the environment, to define the main factors that provoke spontaneous combustion of mining waste. Methods. A comprehensive approach has been applied, which includes an analysis and synthesis of literature and experimental data on the problem of spontaneous combustion of mining waste. The current status of spontaneous combustion of mining waste has been analysed. Results. The feasibility of applying methods and techniques for the treatment of waste rock to further prevent spontaneous combustion has been substantiated Scientific novelty. The dependence of the environmental impact on the processes of thermal oxidation of waste rock mass has been established. The expediency of applying methods and techniques for eliminating self-combustion foci as the main factors of environmental pollution has been determined. A new expedient method and method has been proposed that will allow estimating not only the economic effect but also the environmental one, which will contribute to improving the environmental and economic situation of mining regions where mining wastes are deposited. Practical implication. Practical implication consists in the development of recommendations for methods and techniques to eliminate spontaneous combustion of mining wastes A methodology for determining the necessary quantitative and qualitative composition of inert substances (suspensions) containing sodium group to eliminate sulphurous zones of exogenous combustion processes of waste stock has been proposed. Recommendations on the use of these means and methods have been developed.","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125329201","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}