bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of the geotechnological potential of heavy oil/bitumen production based on the improved method of well hydraulic production
Authors: Pedchenko Larysa , Pedchenko Nazar , Podoliak Mykola , Pedchenko Mykhailo 
Published: June 2024

Abstract
The work provides an analysis of technologies for the intensification of heavy oil and bitumen production. A variant of its improvement based on the technology of borehole hydraulic production supplemented by the processes of dissolution with hydrocarbon solvents and catalytic aquathermolysis is proposed. The technology involves transfer of main operations of technological chain “extraction-preparation” to the productive layer (transfer of rock to composition of hydraulic mixture; viscosity reduction as a result of heating, dissolution with hydrocarbon solvents, destruction as a result of catalytic aquathermolysis; flotation of oil/bitumen droplets and gravitational separation of the rock). At the same time, in order to increase the efficiency of the technology and use of catalyst, it is proposed to implement the catalytic destruction of asphaltenes starting from mining and continuing after extraction to the surface in a technological installation. Moreover, the required volume of the solvent fraction (taking into account its irreversible losses) is expected to be obtained directly at the deposit as a result of catalytic aquathermolysis and distillation at the final stage of preparation. The improvement will allow to ensure the maximum coefficient of extraction of hydrocarbons with simultaneous modernization to the level suitable for transportation by pipelines without additional preparation.
Rhenium sorption from simulated solution with AM-p-2 resin in dynamic mode
Authors: Korovin Vadym , Pohorielov Yurii , Valiaiev Oleksandr , Shestak Yurii , Cortina Jose-Luis 
Published: June 2024

Abstract
The article summarizes the research results on rhenium recovery with AM-p-2 strong-base macroporous styrene-divinyl benzene anion exchange resin with dimethylammonium functional groups from the simulated sulphuric medium and rhenium elution in dynamic mode attaining the recovery rate exceeding 90 % after approximately 1 500 bed volumes. Total dynamic exchange capacity 81.0 mg/g was measured, and column sorption parameters were evaluated using corresponding models. The authors denoted that the total dynamic exchange capacity values defined experimentally and calculated by Thomas fit were close. We studied rhenium elution with the solution containing ammonium nitrate 250 g/L and sulphuric acid 25 g/L yielding rhenium-rich solution that is ~63 times higher comparing to the initial solution. A clear peak in the elution profile allows getting rhenium-rich eluates. The research results will be necessary when defining mass-transfer parameters and designing equipment for processing industrial liquors and waste with rhenium recuperation.
Innovative technology and equipment for stone processing sludge recycling
Authors: Bondarenko Andrii , Kukhar Viktor , Nurmanova Assel 
Published: June 2024

Abstract
The aim of the study is to substantiate the parameters of technology and equipment for the manufacture of building products using alumina sludge from stone processing as an alumina aggregate. The standard methods of setting up an experiment for laboratory washing of granular sludge from stone processing and studying its physical and mechanical characteristics, manufacturing laboratory samples of polystyrene concrete blocks with further study of their strength characteristics were used. The physical and mechanical characteristics of granular man-made material - sludge waste from the stone processing industry - were experimentally determined. The possibility of using man-made sludge in the manufacture of polystyrene concrete blocks was substantiated by its particle size distribution and mineralogical composition. Average samples of granular material were deslagged using the TurboWash unit. The particle size distribution of the material after washing was analysed. According to the standard technology, recipe and raw materials for D300 polystyrene concrete, polystyrene concrete blocks of standard sizes of three grades were produced. Primary sludge without preliminary processing, sand and dusty loess obtained from the processing of primary sludge were used as an aggregate. The numerical values of the axial compression resistance for the studied grades of polystyrene concrete blocks were determined.
Hydrodynamic impact as a way of controlling the state of the coal-gas system: analysis and data processing
Authors: Zberovskyi Vasyl , Ahaiev Ruslan , Vlasenko Vasyl , Prytula Dmytro 
Published: June 2024

Abstract
The research results on hydrodynamic impact during the outburst-hazardous coal seams opening at the Donbas Central District mines are considered. Emphasis is placed on the technological processes complexity related to coal mining and the importance of systematic monitoring of the stress-strain state of rock massif. It is noted that the research and optimization of the hydrodynamic impact process parameters and the coal-gas system state require the use of statistical and probabilistic methods, in particular descriptive statistics. An analysis of the hydrodynamic impact process parameters on the stress-strain state of rock massif in the conditions of steeply sloping seams was carried out using the example of 50 openings. A data array with different characteristics and parameters distribution was obtained. Methods of data distribution normality checking and their use in normality hypothesis verifying for process control are considered. Information on research methods and analysis of parameters related to hydrodynamic impact on the rock massif is summarized. The results of studies of hydrodynamic impact parameters and control of the gasdynamic state of outburst-hazardous coal seams during their opening are considered. The results will be used in further studies of the controlling process of stress-strain state of outburst-hazardous coal seams by hydrodynamic impact.
Innovative technology for mining parallel superimposed inclined tabular deposits
Authors: Kushnerov Ivan , Chukharev Serhii , Maksymov Ivan , Fedorenko Serhii , Kryvenko Andrii 
Published: June 2024

Abstract
Ore deposits are often parallel superimposed inclined tabular ones with waste rock inclusions between ore beds. The present research aims to develop an innovative safe and efficient technology to reduce the cost of waste rock transportation outside the stoping block and provide a rational flowsheet for mining superimposed beds with original structural elements. The paper proposes a new technological flowsheet for mining superimposed deposits with disposal of waste rocks occurring between beds in previously prepared rooms and establishes new dependencies of room dimensions on the volume of rocks to be disposed. The research results enable expansion of the scope of employment of room mining systems and significant reduction in costs in the working area. The efficiency of ore mining is achieved by creating room crowns from unmined interbedded rocks, disposing broken waste rocks in worked-out spaces and rationally mining the deposits. Implementation of the proposed technology enables reduction of the cost of mining ore from parallel superimposed inclined tabular deposits.
Study of rock fracture patterns for obtaining the basis for energy-efficient ore ball milling
Authors: Kondratets Vasyl , Matsui Anatolii , Brovko Dmytro , Demchyshyna Oksana 
Published: June 2024

Abstract
The study is conducted using methods of analysis (in proving the possibility of assessing the disintegration of rocks by energy consumption), methods of free vibration theory (to determine the motion of a falling ball over an elastic connection), methods of energy balance, methods of theoretical mechanics and material resistance (to study amplitude characteristics of mechanical systems), methods of rock fracture theory (to determine fracture work), physical modeling (to design test benches) and experimental methods (to find relationships between parameters). The strength of bulk crushed material in the first stages of ore preparation is practically independent of its coarseness and solid form, which allows the estimated volume of disintegrated ore (particle concentration) to be determined by the energy expended, translated into other physical quantities. Results of experimental studies support the theoretical dependences. The proposed approach of automatic stabilisation of solid concentration in the ball mill pulp at the optimum level allows to increase the productivity of ore preparation on the finished grade in the first stages by 10% at reduction of specific power consumption for ore grinding.
Forecasting the risks of underground roadway stability loss based on mine research data
Authors: Slashchova Olena , Kohtieva Olha , Rahimov Serhii , Kharchenko Vitalii 
Published: June 2024

Abstract
The article presents results of the research on forecasting the risks of underground roadway stability loss based on the results of mine monitoring. The method is used for safety control in the process of conducting mining operations and re-exploitation of roadways as industrial facilities. The risk assessment was carried out with allowance for spread of physical and mechanical parameters of rocks; this approach is confirmed by procession of data of more than 1000 experiments. Mining-and-technical factors and their negative impact on the rock destruction were identified and systematized. The structure of risk control in a geotechnical system “rock massif - roadway” was substantiated. The method for forecasting the risks of underground roadway destruction based on the results of the mine research was further developed. The method differs from the well-known ones by taking into account the dominant influencing factors, variations of values and standard deviations of the forecasted risks of roadway functionality loss and criteria for violation of its technological air gaps at a certain point in time. This makes it possible to assess the degree of danger of mine roadway stability loss and to undertake response measures more reasonably.
Transfer processes in porous diaphragms and ion-exchange membranes for hydrogen production in electrochemical reactor with reduced energy consumption
Authors: Nefedov Volodymyr , Matveev Vadim , Polishchuk Yuliya , Sukhyi Mykhailo K. , Tulskyi Hennadii 
Published: June 2024

Abstract
This paper presents the results of measuring the main physicochemical parameters of diaphragm materials (porous polypropylene, asbestos, mipor, polypropylene, nylon and chlorine fabrics) and the MA-40 anion-exchange membrane. These materials can be used to separate electrode chambers in an electrochemical reactor for producing hydrogen with reduced energy consumption. The values of materials (diffusion and migration) flows in the cathode and anode chambers are described and calculated for the use of porous separating partitions and an anion-exchange membrane. It has been experimentally proven that for woven separating materials, filtration transfer of substances is possible when the pressure in the electrode chambers changes. The complex of obtained results of the studied separating partitions (diaphragms and anion-exchange membrane) clearly indicates the feasibility of using an anion-exchange membrane in an electrochemical reactor with a soluble iron anode to produce hydrogen with reduced energy costs.
Dynamics of a vibrating screen with two motor-vibrators
Authors: Franchuk Vsevolod , Antsiferov Oleksandr , Shkut Anastasiia 
Published: June 2024

Abstract
A method for calculating a vibrating screen with two motor vibrators is proposed. The first part of the article is devoted to the issue of synchronizing the rotation of the rotors of both drives. Their opposite rotation creates a directed force passing through the center of gravity of the screen and perpendicular to the plane of the vibrator axes. The interaction of forces in this plane determines the phase mismatch of the rotation angles of the vibrators θ. An expression is obtained for determining the angle θ depending on the frequency of their rotation vibrators ω. It is shown that at ω > 100 rad/s, motor-vibrators operate in self-synchronizing mode. In the second part of the article a dynamic calculation of the screen was carried out. Linear vibrations in the vertical plane of symmetry of the screen and rotational vibrations around a perpendicular to this plane are investigated. The Lagrange equation of the second kind is compiled without considering inelastic resistances. They are considered at the last stage of the calculation in the form of the imaginary part of the complex modulus of elastic bonds. The amplitude-frequency characteristic of the screen was constructed considering the rotation mismatch angle of the vibrators θ. Stabilization of the oscillation amplitude at high frequencies is shown.
Development and implementation of vibroseismic protection of buildings and structures from external dynamic loads
Authors: Bulat Anatolii , Lysytsia Mykola , Lapin Vladimir , Grebenyuk Serhii , Marienkov Mykola , Ahaltsov Hennadii , Novikova Alina , Kalhankov Yevhen , Lysytsia Natalia 
Published: June 2024

Abstract
The article considers the results of vibration dynamic tests of the vibration acceleration levels of a vibration insulated reinforced concrete slab and floors of a residential building, which have confirmed the effectiveness of the seismic vibration isolation system using rubber elements. The registered levels of vibration accelerations in residential premises on different floors do not exceed permissible levels according to sanitary standards, which ensures comfortable living conditions in the presence of dynamic influences. To determine the actual vibration levels of the soil and piles vibration and dynamic studies were carried out. Based on the results of these studies, numerical calculations were carried out to determine the compliance of the predicted vibration levels in residential premises with the existing sanitary standards when they are exposed to real anthropogenic loads.
Hydrotechnical and ecological principles of water resources management for a mined-out mine field
Authors: Sadovenko Ivan , Tymoshchuk Vasyl , Zahrytsenko Alina , Rodríguez Francesc , Sherstiuk Yevheniia , Vlasov Vladyslav , Chushkina Iryna 
Published: June 2024

Abstract
The article considers the issue of predicting and managing water resources of flooded mines based on hydrotechnical and ecological criteria. Reproduction of a natural-technogenic situation within mine fields with many unknowns regarding the condition of a rock massif and influence factors became possible through a step-by-step construction and identification of a numerical geofiltration model. Balance components of formation for a technogenic underground water mode, capacity parameters and zonal water permeability of a rock massif are estimated as a result of methodical adaptation and creation of a hydrodynamic model of two adjacent mines with a complex hydrogeological structure. A duration and speed for groundwater level restoration at different time periods, an area of underflooding and flooding on the surface is established according to predictive calculations. The inefficiency of submersible pumps use is proven when capital workings lose their drainage functions and a massif has rheological dynamics. Variants for long-term pumping of mine waters with subsequent discharge into a hydrographic network do not bring the territory into a self-draining mode. Therefore, the mode of closing mines with full restoration of underground water level in a monitoring mode with a combination of drainage reconstruction of the surface is the most acceptable.
Experimental study of dust emission intensity from the surface of the alluvium beach
Authors: Medvedieva Olha , Biliaiev Mykola , Kozachyna Vitalii , Mormul Taras , Buketov Valentyn 
Published: June 2024

Abstract
The paper presents data on the current state of waste storage facilities of mining and processing plants in Kryvyi Rih. They are complex, environmentally hazardous hydraulic structures. When assessing the extent of dust pollution from tailing ponds, it is extremely important to know the intensity of dust emissions from the surface of the alluvium beach. This parameter is the basic one in all prognostic models used to predict environmental pollution. The paper presents the results of experimental studies to determine the wind speed at which the removal of dry dust particles from the surface of the beach of a tailing pond begins, as well as the intensity of dust removal from the surface of the beach for dry sand and wet sand. The experimental studies conducted in the laboratory allowed obtaining data on the intensity of dust emission from the surface of the tailing dump beach. The results obtained by the authors make it possible to more accurately assess the degree of environmental dustiness using predictive models. The data on determining the intensity of dust formation for sand of different moisture content will be useful for determining the effectiveness of dust suppression by supplying water to the beach surface.
Method of successive approximation in mathematical modelling of geotechnical mechanics problems
Authors: Larionov Hryhorii , Sapehin Volodymyr , Zemliana Yuliia , Khvorostian Viktor , Holovko Sofiia 
Published: June 2024

Abstract
The purpose of this work was to develop a mathematical model by the results of mathematical modeling of the problem of loading a circular cross-sectional roadway under the action of hydrostatic pressure. Instead of finite element method, it proposed to solve this problem by method of successive approximation, which assumes finding a solution in vicinity of one point in the domain of definition in a multiplicative form where the product functions are one-dimensional functions of parameters. Such representation advantageously differs from classical representation of approximation results by visualization and convenience and by possibility to investigate function sensitivity to the parameter variation. The obtained model provides errors of 5-7%. The results of qualitative comparison of volumetric functions of the tangential stress intensity obtained by the successive approximation method with the representation of numerical results of solving the chosen classical problem presented. Mathematical models of the tangential stresses intensity function in vicinity of a roadway in analytical form are obtained. It is proposed to use this method for representing mathematical models in analytical form and determining function sensitivity to the parameter variation in the problems of geotechnical mechanics. The effectiveness of the method increases when analyzing results of multiparametric problems.
Methodology for determining the design parameters of combined type plasma-chemical reactor for gasification of carbon-containing raw materials
Authors: Shevchenko Volodymyr , Oparin Serhii , Kabakova Liudmyla 
Published: June 2024

Abstract
The paper shows the advantages of combined type reactors for plasma-chemical allothermic processes of carbon-containing raw materials gasification. The methodology for determining the design parameters of combined type plasma-chemical reactor for gasification of carbon-containing raw materials is developed. Analytical dependences for determination of time and constructive parameters of the combined type plasma-chemical reactor are established. Dependences contain interrelation between the main technological parameters of the process of thermo-conversion of carbon-containing raw materials taking into account thermochemical reactions. Dependences of constructive parameters of reaction zone of combined type plasma-chemical reactor for steam plasma gasification of carbon-containing media are obtained. It is established that at steam gasification of carbon-containing raw materials with the maximum particle size of 150 microns and the temperature in the reaction zone of 5000 K the volume of the reaction zone depends on the productivity of carbon-containing raw materials, which has a significant effect on the design parameters of the reaction zone.
Stress state of elastic shell of standard sample in process of cable tear out testing
Authors: Belmas Ivan , Kolosov Dmytro , Bilous Olena , Tantsura Hanna , Onyshchenko Serhii 
Published: June 2024

Abstract
Article purpose is establishment of a quantitative character for influence of structural parameters of a rubber-cable belt on tensile testing results of a standard belt sample and influence of structural parameters on distribution of stresses in a butt-joint connection. Article methodology is in model construction, stress state determination for elastic material of deformed shape located between cables of a sample by methods of linear theory of elasticity and in obtaining parameters of a stress-strain state of an elastic shell of a standard sample for cable tear out testing in a closed form. Influence character of geometric parameters of a rubber-cable belt on tensile testing results of a standard belt sample is established and it allows considering parameters during determining maximum stresses in elastic shell of a belt butt-joint connections. Influence character of a stress-strain state of a standard sample on geometric parameters of a belt is established. The results make it possible to determine a distribution of shear stresses in elastic shell of a belt in butt-joint connections considering the structure of connections based on testing the standard samples. This increases the safety of usage of butt-joint connections of rubber-cable belts and increases their lifecycle.
Geodense section of the lithosphere of the Ukrainian shield along the Shepetivka – Zhytomyr – Dnipro – Volnovakha traverse
Authors: Pigulevskiy Petro , Shumlianska Liudmyla 
Published: June 2024

Abstract
Based on the results of transformation of one-dimensional density models using polynomial corrections to reference model AK135 for different domains of mantle of the Ukrainian Shield, a preliminary reconstruction of the Earth’s geodensity structure to depth of 2600 km was performed. The one-dimensional density models are properly correlated with gravitational field and mass of each mantle layer. Based on these constructions, the integration of the horizontally layered model with seismic stratigraphy data and the vertically block model with gravity field calculations to depth of 275 km along the Shepetivka-Zhytomyr-Dnipro-Volnovakha geotraverse was carried out. The results significantly increased the informativeness of data from two methods regarding the features of deep lithospheric tectonics within the Ukrainian Shield. The results of geological interpretation along the geotraverse show that the megablocks of the shield are best reflected in density anomalies, characterized by different densities both horizontally and in depth. The obtained features of the lithospheric structure of the Ukrainian Shield indicate the need for further research of upper and lower mantle to obtain a comprehensive interconnected model of its structure to refine the petrophysical characteristics that affect the formation of the Earth’s crust and mineral resources.