JOURNAL of Donetsk mining institute最新文献

{"title":"RESEARCH AREAS TO IMPROVE LIGHTING COMFORT OF THE ENVIRONMENT","authors":"A. Belikov, Valeriia Zhurbenko","doi":"10.31474/1999-981x-2022-1-7-15","DOIUrl":"https://doi.org/10.31474/1999-981x-2022-1-7-15","url":null,"abstract":"Purpose. The aim of the study was to analyse the most promising ways to use natural light in new modern construction projects and in the reconstruction of existing buildings and modern methods of designing artificial lighting and interior design using new sources, taking into account the psychophysiological condition of the human body. Methods. In order to achieve the set objectives, the current standards of lighting environment, design solutions for natural light in workplaces, were analysed and the ecological and climatic conditions of lighting on the example of Dnipro were taken into account. Existing artificial lighting systems were analysed, the impact of lighting levels was considered, as well as sources on the state of human health, ability to work and safety. Topicality. The article considers the problem of improving the safety and comfort of the lighting environment under optimal working conditions, which preserve the health of workers and create the prerequisites for maintaining a high level of efficiency. The scientific novelty lies in a comprehensive approach to evaluating the hygienic characteristics of light and colour environment, as well as the application of results for the calculation of lighting systems and recommendations for the design and interior decoration of premises for work of high visual complexity. Practical significance. The research results could be provided to ensure safety of workers in the premises, with categories of work of high, very high and highest precision. The importance of the work lies in the need to take into account the complex effect of a light-coloured environment on the state of workers. The research results proved that safe and comfortable lighting should be designed on the basis of a multifactor model that takes into account the exposure of light of different origins at a workplace with obligatory consideration of the impact on human health during work, as well as determining the energy efficiency of workplace lighting","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"104 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":"123333045","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":"INTEGRATED RISK ASSESSMENT IN COAL MINING","authors":"V. Golinko","doi":"10.31474/1999-981x-2022-1-32-39","DOIUrl":"https://doi.org/10.31474/1999-981x-2022-1-32-39","url":null,"abstract":"Purpose. To determine methodological approaches to the integrated assessment of accidents and hazards of coal mining processes, which allow taking into account the mining and geological conditions of coal mining at a particular mining enterprise. Methods. Analytical methods, methods of probability theory, statistical processing of accidents at coal mines of Ukraine and methods of economic and mathematical modelling are used in the work. Results. Methodological bases for integrated assessment of hazards and harmfulness of production taking into account mining and geological conditions of coal mining are developed. It is shown that ambiguity of existing solutions both in terms of theoretical and methodological approaches, and in their practical use in coal mining enterprises, can lead to inefficient use of funds in the implementation of measures to improve working conditions. It is shown that the occurrence of accidents and hazards caused by hazardous production factors is probabilistic, so the economic assessment of these phenomena should be unified and take into account the expected economic losses in accidents and hazards and the probabilistic nature of these phenomena. Scientific novelty. For the first time it was proposed to use the economic assessment of hazardous and harmful production factors typical of the process or production as an integral assessment of accident rate, measure of hazardousness and harmfulness of a technological process or production. Practical value. The ambiguity of existing solutions both in terms of theoretical and methodological approaches, and in their practical use in coal mining enterprises, can lead to inefficient use of funds in the implementation of measures to improve working conditions. Availability of an integrated assessment of hazardous and harmful phenomena of coal mining allows taking more reasonable decisions aimed at preserving and developing the potential of the coal industry, as well as selection and justification of decisions on design and construction of new energy facilities taking into account social and economic aspects","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"38 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":"115139627","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":"APPLICATION OF ROOF BOLTING TECHNOLOGY FOR MINE WORKINGS IN GAS- AND WATER-BEARING ROCKS","authors":"O. Krukovskyi, V. Krukovska, Yu.O. Vynohradov","doi":"10.31474/1999-981x-2022-1-56-67","DOIUrl":"https://doi.org/10.31474/1999-981x-2022-1-56-67","url":null,"abstract":"Purpose. To substantiate the use of roof bolting for mine workings as a technological way to reduce gas and water inflows into mine workings and to develop the method of reducing water inflow with the use of combined frames and bolts supporting. Methodology. Numerical modelling method for coupled processes of rock mass strain and fluid filtration has been applied. The model is based upon fundamental ideas of mechanics of solids and filtration theory. The problem has been solved using a finite element method. The influence of stress field on formation of the filtration area, the effect of changes in fluid pressure on stress state and decrease in the strength properties of rocks during soaking (in the case of water filtration) were taken into account at each time iteration. Results. A study of the influence of supporting mine workings on filtration permeability caused by its driving has been performed. It is shown that the use of roof bolting restrains the process of cracking in the area affected by mining. At the same time the sizes of the filtration area are considerably reduced, permeability in this area decreases. Roof bolting allows to reduce the average filtration permeability caused by the redistribution of the stress field during the driving of mine working by 15 times or more. The influence of bolts on the process of fluid filtration has been studied. It is established that filtration process is actively taking place around the mine workings with frame support. When using roof bolting, methane from undermined gas sources is not involved in the filtration process. On the walls of the mine working, methane filtration intensity from the coal seam is significantly reduced. Roof bolting reduces water inflows into the mine workings in water-resistant rocks by 2.5 times, in non-water-resistant rocks by 3.4 times. Scientific novelty. For the first time the study of the influence of supporting type in mine workings on formation of the filtration area in the host rocks and the course of filtration processes has been performed. A method of reducing water inflows into mine workings with the use of combined frames and bolts supporting has been developed. It is shown that roof bolting can be used as a technological way to reduce gas and water inflows into the mine workings. Practical significance. Application of the proposed method leads to a significant economic effect by reducing the cost of water pumping and repair work to restore mine workings after emergency water inflows.","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":"132763029","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":"PRINCIPLES FOR DEVELOPING LIQUID MIXTURES FOR SCREENING WIDE FREQUENCY RANGE ELECTROMAGNETIC FIELDS","authors":"O. Panova, Yana Biruk","doi":"10.31474/1999-981x-2022-1-108-113","DOIUrl":"https://doi.org/10.31474/1999-981x-2022-1-108-113","url":null,"abstract":"Purpose: A liquid material based on commercially available paints and fine iron ore concentrate has been created. With a filler content of 60-70 %, the coefficients of shielding of the electric field of industrial frequency is 2,6-9,1; magnetic field of industrial frequency is 4,5-6,2; electromagnetic field of ultrahigh frequency is 4,4-8,5. At the same time, the reflection coefficients of electromagnetic waves are at least twice lower than those of metal screens. Method: A calculation tool is provided for converting the weight content into the volume content of the shielding filler. This makes it possible to apply the Lorentz and Maxwell-Garnett ratios to predict the electrical and magnetic properties of metal dielectrics. To determine the reliability of adhesion of the obtained mixtures with the application surfaces, the study of the chemical and colloidal properties of the mixtures for application on gypsum board has been performed. Scientific novelty: It is established that the reduction of surface tension, surface wetting angle, work of adhesion, cohesion and wetting forces, spreading coefficient are within the limits that ensure the reliability and durability of adhesion of the material to surfaces. Results: It is shown that the reduction of the protective properties on the water-dispersion carrier is due to the oxidation of the filler. Liquid compositions are made on the basis of a number of paints and varnishes and iron ore concentrates, which can cover large surfaces in various shapes and configurations. Practical significance: In order to use the obtained mixtures in the fields of ensuring the electromagnetic compatibility of electrical and electronic equipment, it is necessary to increase the protective properties. This is possible by increasing the concentration of the shielding filler or increasing the specific conductivity of materials in the solid state by adding to the liquid mixture of fine material with high conductivity.","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"62 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":"134256707","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":"PREDICTION OF THE RISK OF OCCUPATIONAL DISEASES OF DUST ETIOLOGY","authors":"V. Golinko, Vladimir Hrydyaev","doi":"10.31474/1999-981x-2022-2-25-34","DOIUrl":"https://doi.org/10.31474/1999-981x-2022-2-25-34","url":null,"abstract":"Purpose. To develop theoretical and methodological approaches to the assessment of the risk of occupational diseases of the respiratory organs of workers caused by the dustiness of the air in the working area. Methods. Analytical methods, methods of probability theory, results of statistical processing of indicators of occupational respiratory diseases of workers and methods of mathematical modelling are applied in the work. The results. The proposed method of predictive assessment of individual and collective risk of the occurrence of occupational diseases of the respiratory organs of workers caused by dustiness of the air in the working area, the information base of which is the materials of certification of workplaces according to working conditions. According to this methodology, risk is defined as the probability of occurrence of an occupational disease during a certain period of time. The methodology is based on the assumption that with dust loads on the body of workers close to critical levels, there is a linear relationship between the severity of the consequences and the amount of accumulated dust. The assessment of the individual risk of the occurrence of an occupational disease of dust aetiology is based on principles based on causal rather than probabilistic relationships, while taking into account the duration of the harmful factor on the worker, the concentration and physical and chemical properties of dust, the presence and protective properties of respiratory PPE , difficulty of work and other indicators characterising working conditions. Scientific novelty. The peculiarity of the proposed methodological approach to the assessment of the risk of occupational diseases of the workers’ respiratory organs of caused by the air dustiness in the working area is that by calculating the dust load on the body of workers and comparing it with the value of the critical dust load, an assessment of the individual risk is carried out, and on its basis, taking into account the number of employees at the facility, the collective risk is calculated. Practical value. The availability of information regarding the individual risk of occupational diseases in an employee allows for timely management decisions regarding the implementation of a set of measures aimed at improving working conditions or the introduction of means of collective and individual protection of the respiratory organs of employees, and also makes it possible to make a timely decision regarding the impracticality of a particular employee’s further work in harmful working conditions when the permissible level of risk is exceeded.","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"45 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":"129248210","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 BEHAVIOR OF A SHOCK WAVE IN A CHANNEL WITH WALLS OF DIFFERENT STIFFNESS","authors":"A. Vasilchenko, Olexandr Danilin, T. Lutsenko, Elena Nadyon, A. Ruban","doi":"10.31474/1999-981x-2021-2-96-103","DOIUrl":"https://doi.org/10.31474/1999-981x-2021-2-96-103","url":null,"abstract":"Purpose of work. Determination of the terms of weakening the destructive action of a shock wave during its propagation in the channels of mining workings or long communication premises of industrial buildings in an emergency explosion. Methods. Using an analytical research method based on the main provisions of theory of combustion and explosion. Construction and analysis of the physical model of formation and distribution of a shock wave in the channel. Results. The problem of weakening of a shock wave during its propagation in long channels of mining workings or communication passageways of industrial buildings with a potentially explosive atmosphere is considered. It is shown that when an explosion in the channel is formed by a head shock wave with a flat front, dynamic pressure which significantly exceeds the pressure on the fronts of falling and reflected shock waves that form the head shock wave. A physical model of formation and distribution of a shock wave in a channel with walls of different rigidity is proposed. It is shown that if one of the walls of the channel is mobile or easily deformed, it leads to a violation of the geometry of the plane front of the head shock wave and its weakening. Moreover, the reconstruction of the plane front of the head shock wave can occur at a distance of not less than 6-8 channel width. On the basis of this observation, the need to arrange explosion-relief valves in channels of mining workings or communication premises of industrial buildings with a potentially explosive atmosphere is substantiated. Novelty. A physical model of the formation and propagation of a shock wave in a channel with walls of different stiffness is proposed. The necessity of equipping explosion-relief valves in the long communication channels of mine workings and buildings with increased explosion hazard to attenuate the shock wave is substantiated. Practical significance. Arrangement of expanders with explosion-relief valves with dimensions comparable to the channel diameter and intervals between them up to 8 channel diameters in long communication channels of mine workings and buildings with increased explosion hazard will lead to weakening of the shock wave and reduction of its destructive effect.","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"47 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":"131489448","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 INFLUENCE OF DEFORMATION PROPERTIES OF SECONDARY SUPPORT STRUCTURES OF MINE GATEROADS ON THEIR RESISTANCE ACCORDING TO THE LENGTH OF THE EXTRACTION PANEL","authors":"I. Liashok, S. Podkopaiev, Leonid L. Bachurin, H. Boichenko, O. Tkachuk","doi":"10.31474/1999-981x-2022-1-68-80","DOIUrl":"https://doi.org/10.31474/1999-981x-2022-1-68-80","url":null,"abstract":"Purpose. To increase the effectiveness of measures to reduce injuries and create safe working conditions for miners in a deep coal mine with steeply inclined coal seams, assess the impact of deformation properties stiffness of secondary support structures of mine gateroads on their stability in the coal-rock strata according to the length of the extraction panel. Methods. To achieve this purpose, the results of in-mine instrumental observations of the stability of haulage roadways under different supporting methods were analyzed, considering the deformation properties of secondary support structures and features of geomechanical processes in the surrounding coal-rock strata during unloading. Results. The conditions for maintaining the mine gateroads within the extraction panel during the methods of supporting practised at the mine were estimated by the magnitude of the convergence of the roof and floor strata on the contour of the haulage roadway and its derivatives. It is determined that in the zone of influence of coal extraction, in the process of deformation of coal pillars or vertical timber sets up to 16-22%, there is a loss of their stability, an increase in the load on the secondary support structure, the intensification of the increase in roof displacements over 0.08 m with a convergence rate of 4.5-5.6 mm/day. In the process of deformation of 4-point chock by 65%, the rate of convergence at the initial stage (30% deformation) increases to 5.1 mm/day, with an average increase in roof displacements to 0.05 m, and then gradually decreases over time, which favourably affects the stability of roof and floor strata and roadways. Reduction of the haulage roadway cross-section when it is supported by coal pillars or vertical timber sets on 45-50% is the result of the destruction of secondary support structures when the rate of convergence of the roof and floor strata along the extraction area is not limited. When supporting the haulage roadway with a 4-point chock reduction of the roadway cross-section by 30% is due to the compression of the secondary support structures, which helps to limit the growth of roof displacements and reduce the rate of convergence of the roof and floor strata behind the working face. Novelty. The estimation of the haulage roadways stability on the steeply inclined coal seams according to the length of the extraction panel is based on the use of regularities of deformation properties of secondary supporting structures of mine gateroads and geomechanical processes in the coal-rock strata when the change in the rate of convergence of the roof and floor strata on the contour of roadways is considered in the zone of influence of coal extraction works. Practical significance. To prevent the collapse of the roof and floor strata in the extraction area of the deep coal mines with steeply inclined coal seams, it is necessary to use yielding secondary support structures of mine gateroads.","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"196 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":"131561866","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 DEFORMATION PROPERTIES OF PROTECTIVE STRUCTURES OF PREPARATORY MINING WORKS","authors":"M. Hryhorets, O. Tkachuk, Serhii Pahomov, V. Vasilenko, S. Podkopaiev","doi":"10.31474/1999-981x-2023-1-29-40","DOIUrl":"https://doi.org/10.31474/1999-981x-2023-1-29-40","url":null,"abstract":"Purpose. To study the stability of the security structures of the preparatory mine roadways of steep seams while unloading the coal-rock massif to prevent the collapse of side rocks in the excavation areas of the coal mine and create safe working conditions for miners.\u0000\u0000Method. In order to achieve the aim of the research, the study of the stability of security structures was carried out at the laboratory of mountain pressure by using experimental samples in the form of whole coal and structures consisted of crushed rock, which were subjected to uniaxial compression.\u0000\u0000Results. Under the conditions of uniaxial compression of whole coal or constructions consisted of crushed rock, with the ratio of length to width a/b= (1-2) and an increase in the cross-sectional area S (m2) of the experimental samples, a relative change of their volume δV was observed. For whole coal, the steady state is ensured by the relative volume change δV ≤ 0,1. Beyond the set value of δV, the whole coals lose their stability and collapse, which results in the collapse of the side rocks. For the crushed rock structures, with an increase in the cross-sectional area of the compressible specimens, the relative volume change decreases from δV = 0,2 to δV = 0,35. At the same time, the crushed rock is compacted in the whole volume of the used material, the bearing capacity of protective structures is increased, which enables limiting the movement of lateral rocks and ensures their integrity.\u0000\u0000Scientific novelty Within the limits of the deformation resource of protective structures consisting of crushed rock of different granulometric composition, with their uniaxial compression, a type of functional dependence was established, which enables us to estimate the relative change in the volume of flexible supports from stiffness, which is necessary for assessing their bearing capacity.\u0000\u0000Practical significance. In order to create safe working conditions for miners in the excavation areas of a deep coal mine and prevent the collapse of side rocks in the coal massif, it is advisable to use flexible protective structures for the protection of preparatory coal mine roadways, when the ratio of their linear dimensions corresponds to the ratio of length to width of a/b>(1-2).","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"45 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":"124443603","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":"ECOLOGICAL PROBLEMS OF UNDERGROUND AND TERRESTRIAL URBANISTICS","authors":"O. Kofanova, O. Kofanov","doi":"10.31474/1999-981x-2021-1-119-134","DOIUrl":"https://doi.org/10.31474/1999-981x-2021-1-119-134","url":null,"abstract":"Purpose. The aim of the study is to predict the potential risk of urban air pollution by toxic components of exhaust gases of vehicles in terms of the underground and terrestrial urban planning, in particular, street canyons, underground pedestrian crossings, underground parking lots, etc. Methods. The following research methodology was used in the work: on the basis of space-time field observations of the intensity, density and speed of traffic flows, as well as using mathematical modeling methods it was proved that urban air pollution (of the roadside space, adjacent territories of well-type yards, underground infrastructure, etc.) by toxicants, which are components of vehicle engine emissions, remains at a high, often environmentally hazardous level, and therefore requires urgent development and implementation of the appropriate precautionary measures. Results. The analysis of problems of ecological safety of city objects of terrestrial (high-traffic roads, adjacent territories) and underground (underground pedestrian crossings, garages, parking lots) urbanistics allowed to reveal direct and indirect negative influences on air environment from emissions of motor vehicles; using mathematical modeling methods to predict the fields of concentration of major toxicants and identify areas of local emergency pollution in different weather conditions, identify the most unfavorable directions and wind speeds and assess the level of environmental hazards to human health (residents of houses located in the well-type yards, pedestrians, owners of underground garages (parking lots), tenants of parking spaces, etc.). Scientific novelty. The study revealed direct and indirect negative effects of the motor transport complex on the air environment of urban territories (objects of terrestrial and underground urbanistics), in particular, based on the use of mathematical modeling methods. The level of environmental danger to the health of urban residents has been assessed. Practical significance. The results of the study can be used in the design and construction of urban infrastructure, as well as to reduce the technogenic load on the environment and human health in existing objects of terrestrial and underground urbanistics and other city areas.","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"77-78 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":"124907401","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":"METHODICAL PRINCIPLES FOR DETERMINING THE OPTIMAL WORKING TIME OF A MOUNTAIN RESCUER","authors":"Oleksandr Tokarskiy","doi":"10.31474/1999-981x-2022-1-172-181","DOIUrl":"https://doi.org/10.31474/1999-981x-2022-1-172-181","url":null,"abstract":"Goal. Development of methods for studying the impact of dangerous and harmful factors on the mountain rescuer during search and rescue operations at low ambient temperatures. Method. The article presents the results of the study according to the methods of Euro standards, namely: experiments, theoretical analysis. Results. The article examines in detail the problem of protection of mountain rescue workers during search and rescue operations in mountainous areas, which is characterized by limited transport accessibility, and proposes methodological principles for studying the impact of low temperatures on the functional state of rescue workers. A certain algorithm for conducting a study of the level of protection of mountain rescuers is proposed and the need to standardize the time of search and rescue operations for effective work and minimal damage to the health of the mountain rescue service. Scientific novelty. The article for the first time uses the method of determining the degree of influence of low temperatures on the human body, in particular on the functional state of a mountain rescue worker, taking into account the level of his protection by electroencephalogram (EEG). Practical significance. The recommended method will ensure the formation of requirements for the regulations of all search and rescue operations by mountain rescue workers in areas with rugged terrain and relative elevations of 500 m and more within a radius of 25 km, and areas above 900 m and above sea level. Accordingly, the implementation of the proposed requirements of the regulation will ensure the rationing of the time of work of varying degrees of load at low temperatures that affect the human body.","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"29 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":"122859472","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}