bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ventilation system with heat recovery and PCM thermal energy storage for “free” cooling in buildings
Authors: Jocić A , Lenassi P , Osterman E , Stritih U 
Published: June 2024

Abstract
For the conventional cooling of buildings, we are using electrical energy from the network, which increases annually due to the increase in comfort. Alternatives are being sought to reduce electricity consumption. Phase change materials (PCMs) in ventilation systems can provide us with the accumulation of night-time coolness in the summer months, resulting in a reduction in the consumption of electricity for cooling. Heat storages that take advantage of the phase change are used for short-term storage of thermal energy, as in this case, they have the greatest potential. In the introduction to the paper, a review of heat storage devices and their use is made which shows their connection with the Energy Performance Building Directive (EPBD) and the Energy Efficiency Directive (EED). Based on the measured results of the measurements in the Laboratory for Heating, Sanitary and Solar Technology and Air-conditioning (LHSA), a comparison with the model that calculates the storage of heat and cold in a phase change material (PCM - Phase Change Material) developed by a group of researchers from BUT Brno was made. With the TRNYSY software tool and the model simulations of the ventilation gains in the summer season were made and compared with the gains when using the heat exchanger (recuperator) and the PCM heat accumulator for the selected room.
Strategic planning of open pit mining operations using the Micromine Beyond Optimiser
Authors: Anisimov Oleh , Bariatska Nataliia , Cherniaiev Oleksii 
Published: June 2024

Abstract
Modern software products allow to determine the quantity and quality of ore at any point of the deposit and, accordingly, to identify the optimal pit shell using specialized algorithms. Such algorithms make it possible to create the final open pit shell even with a broken bottom for several neighboring ore bodies. Currently, optimization solutions in the mining industry require the determination of the maximum present value of profit or the minimum stated costs. It allows to make strategic planning decisions. Strategic planning of open-pit mining operations in the development of mineral deposits in Ukraine can be implemented using the Micromine Beyond Pit Optimizer. The authors considered the parameters that affect the boundaries of the pit field and the optimization criteria.
Design of elements of specialized technological equipment for finishing processing of parts
Authors: Romanchenko Oleksiy , Lohunov Oleksandr 
Published: June 2024

Abstract
This article is devoted to solving the current problem of use of the polyester materials application for the synthesis of specialized technological finishing equipment elements that usually used by enterprises for the repair and maintenance of mining equipment. The article discusses the possibility of the polyester materials application when creating equipment elements. The equipment’s parts are created by using additive technologies, in which the creation of the part occurs by sequential application of material layers. The use of polyester materials makes it possible to reduce labor intensity, increase the economic efficiency of production and ensure compliance with environmental standards both during the production process and during subsequent processing. Based on the modeling results, an analysis of the strength characteristics of the specialized technological equipment reservoirs made of steel 3 (ISO – E 235-C, Fe 360-C) and polyethylene terephthalate (PET plastic) was carried out. The possibility of application of the PET plastic as an analogue material for the reservoir manufacture with the ensuring of the necessary strength characteristics has been established.
Enhancing the adaptability of a mining complex in a dynamic environment by utilizing the technology for the development of a man-made deposit with a mobile ore preparation complex
Authors: Hryhoriev Yulian , Shvets Yehor , Joukov Serhii , Smirnov Oleksandr , Hryhoriev Ihor 
Published: June 2024

Abstract
The paper deals with the issue of the development of man-made deposits of the bulk type, especially that formed during the development of iron ore deposits. An analysis of the actual state of man-made deposits was performed. Based on analysis the technology of man-made deposits mining was proposed. It involves the extraction of technogenic raw materials from the bulk and their separation according to quality characteristics using a mobile ore preparation complex. According to the proposed technology, the conditioned raw materials are sent to the processing place, and the empty rock is laid in layers in the created space. The parameters of the mining system were studied in the paper: the width of the excavator’s cut step is limited on the one hand by the unloading radius of the dragline, and on the other by the turning radius of the dump truck. A significant role is played by the raw material utilization ratio: the larger it is, the narrower the excavator cut step will be. The results of the research can be useful for design organizations and mining enterprises which implement resource-saving technologies.
Forecasting the risks of man-made and ecological disasters
Authors: Dychko Alina , Remez Natalya , Yeremeyev Igor , Borovyk Maksym 
Published: June 2024

Abstract
The paper provides the SWOT analysis procedure for forecasting and assessing the possibility of man-made and ecological disasters, the technology and intellect-card of the catastrophe risk assessment process. An expert system for operational assessment and forecasting of the scale of a radiation accident at the nuclear power plant is developed. An expert system, created considering a base of relevant knowledge, as well as current data (facts) from dosimeter monitoring posts located around the nuclear power plant, and meteorological information, is considered. It is concluded that such an expert system for assessing and forecasting the situation at a nuclear power plant in the event of an accident should be a standard tool at any nuclear power plant: its use allows to assess the environmental state and decision making quickly and with a high degree of reliability.
Mineral composition of the processed forming mixture of the Kryvyi Rih Mechanical Repair Plant
Authors: Tikhlivets Svitlana , Hrytsay Olena , Filenko Valentyna 
Published: June 2024

Abstract
Currently, Ukraine and developed countries have developed and are constantly updating national waste management programs. Industrial waste as a raw material potential can replace primary sources of natural resources, significantly reduce resource consumption and help ensure the raw material independence of territories and individual countries. The spent molding compound of the Kryvyi Rih Mechanical Repair Plant is a multi-ton solid waste from foundry production. A part of the spent molding mixture is reused as a recyclable material, but the bulk of it is disposed of at municipal solid waste landfills. In this paper, the mineral composition of the spent molding compound is studied in detail, which reveals the possibilities of its reuse. Based on the results obtained, the mineral composition of the spent molding mixture was determined, and mineralogical recommendations were given for the technology of processing the spent mixture. Its involvement in reuse will make it possible to obtain conditioned reconstituted molding sands, free up part of the solid waste landfills, and reduce the negative technogenic load.
Risk-forming areas of mine hoisting equipment and directions for reducing contact loads on shaft reinforcement
Authors: Ilin Sergey , Adorska Larisa , Babets Dmytro , Ilina Inna , Kruzhnova Svetlana , Fursina Anna 
Published: June 2024

Abstract
The paper considers the influence of diagram of peripheral rotational speed of the rope-driving body (pulley, drum) of a mine hoist on dynamic processes in the system “hoisting vessel - reinforcement” of a vertical mine shaft. It is shown that areas of abrupt speed changes (acceleration or deceleration, override in case of smooth motion disturbances, accidental rubbing, vessel catching on ledges in the guides, etc.) create a peripheral acceleration or deceleration of the pulley or drum rims, which causes longitudinal excitation of the upper ends of the main ropes. These and other factors lead to a sharp increase in the contact loads of shaft guides and braces, and an increased risk of their sudden failure, especially when the safety margins are reduced due to significant wear and tear of metal structures. The ways to adjust and optimize the actual hoisting speed diagram in order to reduce the contact loads on the shaft reinforcement and the associated risks of accidental hazards of mine hoisting equipment (MHE) are determined.
Analysis of stress-strain state changes in railway tracks during transition to European gauge
Authors: Fischer Szabolcs , Kurhan Dmytro , Kurhan Mykola , Hmelevska Nelya 
Published: June 2024

Abstract
The geographical location of Ukraine facilitates its integration into the transportation network connecting European countries. Various options exist for transitioning from the gauge of 1 520 mm to the European standard gauge of 1 435 mm. This paper aims to analyze the changes in the stress-strain state of railway track elements during the reconstruction of existing sections from the 1 520 mm gauge to the 1 435 mm European gauge or to a dual gauge of 1 435/1 520 mm. To perform these calculations, a spatial model of dynamic deformations in the railway track is employed, based on the principles of elasticity theory. The implementation of a combined railway track complicates the stress state of the ballast layer, leading to asymmetric stresses along the length of the sleepers, which vary depending on the track on which trains operate. There is also a redistribution of stresses acting on the ground structure, which has been in operation for many years. The research results identify changes in the stress-strain state of the railway track and can be used to justify measures for the appropriate reinforcement of the ballast layer and the ground structure.
Substantiating the expedient route parameters for the location of the site outgassing wells in the Western Donbas conditions
Authors: Bondarenko Volodymyr , Salieiev Ildar , Kovalevska Iryna , Symanovych Hennadii , Shyshov Maksym 
Published: June 2024

Abstract
The paper deals with the issues of substantiating the parameters of location outgassing wells, determining their expedient routes in the mining-geological and mining-technical Western Donbas conditions. Based on the conducted multifactorial computer experiment, the patterns have been obtained of influence of the coal-overlaying formation texture on the parameters of its shear into the mined-out area. When determining the patterns of influence of mechanical properties of the coal-overlaying formation lithotypes, they are divided into three generalized groups: low, averaged, high. At the same time, the influence of the height and distance parameters the strongest and hardest lithotype occurrence, such as sandstone, has been studied. It is noted that with low mechanical characteristics, the gradient angle of the line of changing curvature sign of the rock layers bending in the direction of the coal seam dip is steadily decreasing. Conditions have been identified and criteria have been developed for the most effective routes for the location of site outgassing wells. The developed criteria, in combination with the dependences of the coal seam shear parameters, make it possible to create a methodology for determining the expedient coordinates for drilling outgassing wells based on the results of modeling by the finite element method.
Regularities of rocks zonal disintegration and methane emissions periodicity in mine roadways
Authors: Slashchov Ihor , Bielikov Anatolii , Slashchova Olena , Yalanskyi Oleksii 
Published: June 2024

Abstract
The article presents the results of studies on the establishment of stable relationships between methane emissions into degassing wells and their spatial location, stress-strain state of rock massif and mining operations process. Vibroacoustic and electrometric of mine control methods have been used to establish zoning and alternation of fractured zones in the rock massif during mining operations. Using the finite element method, zones of different permeability in the roof above the longwall face were determined, and a qualitative transition from compressive deformations to tensile deformations was revealed. Based on data from mine experiments at 157 degassing wells, patterns of repeatability of rocks zonal disintegration and periodicity of gas emissions into mine roadways depending on the distance to the moving longwall face have been determined for the first time. It has been established that the concentration of methane gas in a wells with distance from the longwall face changes according to a damped quasi-periodic dependence with recombinant changes in stress-strain states. For wells aimed at the goafs, the period of the quasi-periodic function increases by 40%, the amplitude decreases to 30%. The obtained dependencies make it possible to increase the efficiency of degassing.
Application of remote sensing techniques for estimation and mapping of iron oxides and iron-containing minerals in open pits of the Kryvyi Rih iron ore basin
Authors: Novikov Leonid , Serdiuk Svitlana , Dovhanenko Denys , Okhotnyk Kateryna , Ishchenko Kostiantyn 
Published: June 2024

Abstract
The purpose of this study is to use remote sensing data to map the deposits of the Kryvyi Rih iron ore basin. Several methods for estimating iron oxide content have been applied and tested. Using image processing techniques, color composites, band ratios and supervised classification, a map of rocks with different iron oxide contents in the Inhulets and Skeliuvats-Magnetite deposits was create. The proposed method uses six Landsat 9 bands to map iron-bearing minerals and rocks (spectra 1, 3, 4 and 5) and hydroxyl (spectra 1, 5 and 7), which are easily visible in the pictures of the operation land images. The final identification of iron deposition was based on the difference in reflectivity of iron oxide content. The Kryvyi Rih iron ore basin is an excellent environment for remote sensing experiments for iron ore identification. Quite large-scale outcrops of ore bodies with pronounced reflection spectra are observe at the deposits. The large extent of development of ferruginous horizons makes them easy to diagnose using Landsat series satellites.
Analysis of rock grinding results in centrifugal-vibrational disintegrating module
Authors: Shevchenko Heorhii , Greshta Viktor , Tytov Oleksandr , Sukhariev Vitaliy 
Published: June 2024

Abstract
This scientific study is devoted to analysis of the results of grinding materials such as marble, sandstone and granite in a disintegrating module. This module combines grinding of particles in the countercurrent centrifugal mill with simultaneous vibrational screening of the finished product. The essence of the study is that two-factor experiments have been carried out according to the full factor scheme. Here, the achieved degree of crushing is used as the response function. The valuable factors have the initial size and the ultimate strength of the material. As a result of two-factor analysis of variance, it has been found that the compressive strength and the initial size of the material, regardless of the sieve vibration amplitude, have a significant and comparable scale effect on the material crushing ratio. At the same time, the interaction of factors has no statistical significance. Also, approximation of experimental data by the first- and the second-order regression equations has been performed. For simplified calculations, it is recommended to use the linear regression equation, while for more accurate ones, the second-order equation is more suitable.
Composition and treatment of wear resistant steel for application in mining industry
Authors: Brykov Michail , Shalomeev Vadim , Matveev Vadim , Parahnevich Evgen , Tabunshchyk Galyna , Ruban Valentyna 
Published: June 2024

Abstract
The service life of machines in the mining industry is in the most cases determined by wear rate of parts in contact with the rock and soil. This work demonstrates the results of investigation on wear resistance of high-carbon low-alloy steel under abrasive wear. Steel samples containing 1.2 wt.% of carbon, 3 wt.% of manganese and 2 wt.% of silicon were hardened from 900 °C and 1000 °C and subjected to two-body and three-body abrasion tests. It has been established that after heat treatment this steel has increased abrasive wear resistance due to the phase transformation of unstable austenite into deformation-induced martensite. The results of study of near-surface region microstructure of samples after wear are presented. X-ray diffraction analysis and measurement of the microhardness of the worn surface were also carried out. It has been established that during abrasive wear a continuous layer of deformation martensite with a microhardness of 1300-1400 HV 0.05 is formed at a depth of up to 10 μm. Such a microhardness significantly exceeds the microhardness of quenching martensite. The results of the work can be used to increase the service life of wear parts of mining equipment.
Numerical modeling of the wind regime on the beaches of the wash of the artificial storage facilities for mineral processing waste
Authors: Lapshyn Yevhen , Biliaiev Mykola , Biliaieva Viktoriia , Halchenko Zariana , Medianyk Volodymyr , Buketov Valentyn 
Published: June 2024

Abstract
A 2D numerical model has been developed to estimate the airflow velocity field when flowing around the dam of an artificial storage facility for mineral processing waste. To solve the aerodynamic problem of determining the air flow velocity field when flowing around such hydraulic structures with a complex geometric shape, a potential motion model was applied. The numerical integration of the equation for the velocity potential is carried out using the Liebman method. The geometric shape of the tailings storage facility is formed in a discrete model using the marking method. A computer program was created to implement the developed numerical aerodynamics model. Based on the processing of the results of computational experiments, coefficients were obtained that allow us to quickly determine the value of the air flow velocity at the beginning and end of the tailing pond beach, i.e. in the area of the most intense dust emission. This allows for a quick prediction of the risk of dust air pollution at different tailing pile heights.
Prediction of the mineral components spatial distribution in tailings ferruginous quartzite enrichments
Authors: Babii Kateryna , Kratkovskyi Igor , Kuantay Aidana 
Published: June 2024

Abstract
In Ukraine, a significant mass of potential man-made deposits is represented by waste from ferruginous quartzite enrichment. The mineral mass of such deposits is mixture of iron-containing minerals (magnetite, ilmenite) and quartz. The M.S. Poliakov Institute of Geotechnical Mechanics has developed a new methodology for the mineral components spatial distribution predicting in tailings of ferruginous quartzite enrichment. It includes the fractional and mineralogical composition of the samples study by optical method, and spatial useful components distribution of prognostication in waste and predictive plans construction for the useful components spatial placement. A previously unknown pattern of changes in mineral composition of wastes from mining ore production was revealed which caused by the turbulent transportation mode and waste deposition on the tailing (potential man-made deposit) area. This regularity arises from the fact that with decrease in the size of the mineral components particles with size of 0-200 microns, the share of the magnetic mineral magnetite increases linearly and, accordingly, the share of the non-magnetic mineral quartz decreases. The obtained new properties of man-made deposits from the waste (tailings) can be used in creation of resource-saving technology for the iron ore man-made raw materials processing and to determine their suitability for mining.
Morphogenetic types of amber traps in the Pripyat amber basin
Authors: Komliev Oleksandr , Remezova Olena , Naumenko Uliana , Krynitska Mariia 
Published: June 2024

Abstract
The amber industry in Ukraine requires the expansion of its mineral resource base. This requires a scientifically sound, modern methodological basis for the “amber forecasting and prospecting system”, which will allow the amber industry to develop systematically, addressing environmental, socio-economic, scientific, educational, and educational issues in a comprehensive manner. It takes into account all known theories of amber formation and uses the main scientific and methodological approaches to prospecting for various minerals. The Prypyat Amber Basin is the most important of all amber basins in Ukraine, which will provide the main increase in amber production in Ukraine. The geological, paleogeographic, geomorphosystemic, and paleogeomorphological factors of the development of its territory and the formation of alluvial amber deposits here are well studied. This makes it possible to introduce the concept of “amber-bearing formation” and “amber-bearing object”, to create a classification of types of amber placer deposits, confirmed and predicted. According to it, structurally-tectonic, geomorphological, paleogeomorphological, morpholithogenetic and combined types of traps of amber can be distinguished. The article discusses morphogenetic types of traps that belong to their combined type and are studied by geological and geomorphological methods.
Parametric evolutions of explosive fracture zones in the explosion of series of blasthole charges with a complex structure
Authors: Malykh Dmytro , Eremenko Genady , Titov Danyl 
Published: June 2024

Abstract
The purpose of the paper is to specify calculations of a rock mass fracture zone in the explosion of series of blasthole charges with a complex structure under mathematical modelling of their interaction if parts of the blasting agent are spaced along the well length by means of an inert material. The parts are blasted sequentially. Therefore, dynamic load of exploded rock mass has been analyzed depending upon a blasting order of the charges and their parts. Originality is to define more exactly the regularities of interaction between explosive energy of blasthole charges with the specific design and rock mass enclosing them. The developed methods help identify usability of the explosives, designed by the authors, and simplify calculations of drilling-and-blasting description. It has been proved that selection of charge mass with different ratios of their parts in the sequential wells, and variation in lag intervals between the explosions make it possible to control a process of rock mass loading depending upon the specific mining and geological conditions if features of a force field are known. The findings expand methodological basis as for design of open pits while favouring implementation of explosive charges which structure is proposed by the authors.