bluuebunny/crossref_metadata_2025_split huggingface dataset:
Power consumption control of multi-pump systems of the main water drainage in underground mines based on the Mamdani fuzzy inference system
Authors: Mykhailenko O , Baranovskyi V , Shchokin V , Karabut N , Kolomits H 
Published: November 2023

Abstract
The article considers synthesis of an expert system for controlling electric power consumption by pumps of main water drainage facilities of an underground mine on the basis of the Mamdani fuzzy inference algorithm. The proposed system has a MISO-structure (multiple-input, single-output) with two input variables, such as water inflow and power cost as well as one output coordinate – power of pumping units. Two bases of fuzzy rules such as conjunction (AND) and disjunction (OR) are formed. By simulation modelling, a comparative analysis of fuzzy control systems for power consumption by water drainage facilities is carried out, as well as a system without control, when the pump performance is stabilized, during week and month periods. It is established that OR-rule based systems can reduce power costs by 1.89% during a week and by 2.28% during a month, and AND-rule based systems by 4.13%, as well as by 5.43% during week and month, respectively. At the same time, we note that the economic effect is achieved not through a decrease in power consumption, but by adjusting the operation mode of the water drainage facility, which involves ensuring maximum efficiency of groundwater drainage when the power cost is high, and minimum efficiency when it is low.
Justification of drilling parameters of a typical well in the conditions of the Samskoye field
Authors: Khomenko V L , Ratov B T , Pashchenko O A , Davydenko O M , Borash B R 
Published: November 2023

Abstract
In the Republic of Kazakhstan, there is a noticeable shortage of water resources, which is a consequence of the natural features of its territory and climate. In particular, there are big problems in the water supply to the Mangystau region. The main source of water in the region is the Samskoye groundwater field. In this work, the conditions of the Samskoye field are typified, the method and technological parameters for drilling a typical well are selected and substantiated. It has been established that rotary drilling with reverse circulation in the conditions of the Samskoye field has significant advantages. The maximum possible production rate of drilling with reverse circulation, taking into account the limited thickness of the aquifer, is 4.3 times higher than with rotary drilling with direct circulation and 2.5 times higher than with percussion drilling. With the same filter pipe diameter, the greatest possible thickness of the gravel pack layer in reverse circulation drilling is 15 times greater than for conventional rotary drilling and 3.7 times greater than for percussion drilling. Thus, the use of rotary drilling with reverse circulation will solve an important problem – the provision of domestic and drinking water supply to the area.
Determining key features of the operation of percussion downhole drilling machines
Authors: Ihnatov A O , Koroviaka Ye A , Pavlychenko A V , Rastsvietaiev V O , Askerov I K 
Published: November 2023

Abstract
Dnipro University of Technology is a leading institution where an authoritative scientific school was formed to solve the fundamental issues of percussive-rotary drilling with the help of hydraulic hammers. This method makes it possible to intensify significantly the mining processes of rock mass breaking. In order to perform the specified function as fully as possible, hydraulic hammers are to work in a certain technological mode and have appropriate technical characteristics; the paper deals immediately with the analysis of those characteristics. The original designs of hydraulic hammers proposed by the authors are distinguished by a high degree of reliability of the interaction of individual parts and assemblies. Simulation of the operation of hydraulic hammers under appropriate mode-parametric support revealed a number of their significant advantages, i.e. in terms of creating effective conditions for rock mass disintegration. It has been proven convincingly that some features of the approaches to the implementation of a hydraulic well washing programme correspond to the stability of a high-quality process of the downhole work of percussion machines. As a result of the research, a composition of some rational formulations of flushing fluids, which contribute to a significant acceleration of the development of destructive processes, was clarified.
Component composition of the processed forming mixture and mineralogical recommendations for its re-use
Authors: Filenko V , Hrytsai O , Tikhlivets S 
Published: November 2023

Abstract
Modern industrial production is aimed at the development of waste-free technological processes, wider use in the production of waste and by-products. The largest amount of waste is generated from the activities of mining and metallurgical enterprises. One of the problems of foundry production is the disposal of multiton solid waste, about 90% of which is spent molding mixture. Part of the spent mixture is reused as recyclable, but the main mass of it is collected at municipal solid waste landfills. This work is devoted to the study of the component composition of foundry production waste – spent molding mixture with the aim of its reuse. According to the results of the research carried out by the authors, mineralogical recommendations regarding its reuse were provided. Involvement in the reuse of spent molding mixture will allow to free up part of the solid household waste landfills, reduce the negative man-made load on the environment, and additionally obtain conditioned restored molding sands.
Interaction of conical monolithic thin-walled reinforced concrete shells with the soil of the foundation
Authors: Panteleienko V I , Karpushyn S O , Chervonoshtan A L 
Published: November 2023

Abstract
Conical monolithic thin-walled reinforced concrete blocks (shells) can be used as foundations for frame structures and buildings with load-bearing walls. As an analogue of columnar foundations, this type has the advantage of the speed of installation. It almost wholly excludes earthwork and formwork from the technological process, provided that the physical and mechanical properties of the soil base are improved. Shells are immersed in the supporting soil base with the help of dynamic or static loading. Additional soil base compaction occurs due to interaction with the conical outer surface of the shells. The work aims to develop the theoretical foundations for modelling, mathematical description and the possibility of optimizing the process of sinking monolithic thin-walled spatial reinforced concrete shells that model foundations for low-rise technological or residential facilities. Based on the analysis of the ”hammer-head-shell-soil” system, an elastic-viscous-plastic model with an attached soil mass was developed and presented, which is used as a basis for developing a system of nonlinear differential equations of the second order. The article provides recommendations on the impact of structural and technological factors on the failure rate and the contact stresses in the hammer-shell zone. The following factors have a significant influence on the failure of the shell: the height of the hammer lift, soil resistance, and the ratio of the masses of the hammer and the shell. The effect of shock-absorbing elements is insignificant. The greatest influence on the magnitude of the contact forces in the zone of the hammer-shell has: the height of the fall of the hammer and the stiffness of the resilient gasket.
Research of borehole drilling parameters for determining the optimum size of granite stone blocks
Authors: Panasiuk A , Davydova I , Shlapak V , Levytskyi V 
Published: November 2023

Abstract
The optimal geometrical parameters of boreholes in dimension stone quarries, whose impact on granite blocks separation and splitting efficiency, are determined, taking into account the stress-deformed state of rock massif. The crack initiation process is analysed considering the flat problem of elasticity theory. Determine destruction parameters of natural stone by borehole methods using the calculations of the required distance between the boreholes in the row along the splitting line with the specified borehole diameters, and created forces of stone destruction are proposed. The optimal shape of splitting block from massif depends on the specific plane of splitting is determined. The possible directions of borehole deviation from ideal ones, their extension due to drilling and tensions in the boreholes are studied. The introduction of the borehole’s overlapping coefficient, which influences the weakening of the massif along the directed (designed) split line, is proposed to define further necessary tensions for mechanical ways of separating blocks. The equations for determining drilling operations parameters at granite blocks splitting from dimension stone quarries massifs are proposed. The coefficient of limit values of deviation angles is defined.
Useful nanoparticles from mining waste and acid mine drainage
Authors: Panayotova M , Mirdzveli N , Panayotov V 
Published: November 2023

Abstract
Mining waste can generate environment pollution including acid mine drainage (AMD). AMD is dangerous for its surroundings and can pollute surface and groundwater it is contacting with. Nanomaterials are advanced materials used in all fields of human activity and development. However, their production is still expensive and may pollute the environment due to the chemicals’ used and/or production of the energy needed for their synthesis. A smart solution could be use of mining waste and AMD to produce nanomaterials with properties similar to the properties of nanomaterials obtained from clean chemicals. Thus both waste will be valorised / decontaminated and useful and needed materials produced. This paper presents production of nanoparticles and nanomaterials from mining waste and AMD with emphasis on iron- and copper-based materials, as well as some applications of the obtained materials.
Enhancement of the technology of caved ore drawing from the ore deposit footwall “triangle”
Authors: Pysmennyi S , Chukharev S , Peremetchyk A , Shvaher N , Fedorenko S , Tien Vu Trung 
Published: November 2023

Abstract
In mining iron ore, over 60% of underground mines at Kryvyi Rih iron ore basin apply a system with the bulk caving of ore and overlying rocks. However, when the deposit dip is 45-60 degrees, application of this mining system leads to losses of about 30-40% of the footwall ore. Available methods of the loss reduction result in an increase in production costs or a decrease in the iron content in the mined ore mass. After analyzing the mechanism of forming the figure of drawing, it is proposed to change its parameters without significant costs due to the use of an inclined plane and an overcompacted ore layer. The presented study enables stating that with an increase in the inclined plane angle from 45 to 75 degrees the draw crater radius increases from 2 to 7.5 m, and a decrease in the factor of first loosening of ore leads to an increase in the radius of the crater to 10 m. Thus, for the first time it is proved that a decrease in the first loosening factor leads to the increased semi-minor axis of the ellipsoid of drawing and the width of the active drawing area, which will reduce losses of caved ore when drawing it from the stoping block in the footwall area. It is established that in order to minimize losses and dilution of ore when using level mining systems, the drawpoint should be located in the block sill at a distance ensuring formation of the 20 to 25 m high ellipsoid of drawing. In case of an overcompacted 22 m thick ore layer, it is possible to significantly reduce ore losses from 14 to 10% and ore dilution from 16 to 9%, thereby enhancing ore mass extraction indices without additional costs.
A new approach to producing a prospective energy resource based on coalmine methane
Authors: Sai K S , Petlovanyi M V , Malashkevych D S 
Published: November 2023

Abstract
The paper describes topical issues of a prospective method for coalmine methane utilization for obtaining an additional valuable energy resource for the regional development of coal-mining areas. It is noted that the development of the extraction of methane resources is very urgent and is of great economic importance for ensuring the energy independence of Ukraine. The experience and technologies of using methane and coalmine gas by global coal-mining companies are analyzed. Modern prospects and opportunities for using coal gas are studied. There is a need to transform the coalmine methane removal system and directions for maximizing the use of its resources in a wide range of concentrations in the composition of gas-air mixtures based on the development of innovative technologies to improve the efficiency and cost-effectiveness of functioning coal-mining enterprises. Attention is focused on the advantages of using gas hydrate technologies for obtaining additional energy resource under conditions of changing coalmine methane concentrations. The specifics of the process of mixed gas hydrate formation from gas mixtures of various geneses have been studied. It has been revealed that it is the coalmine gas-methane composition that determines and forms the basic condition for hydrate formation. The thermobaric conditions for the hydrate formation process at different methane concentrations in gas mixtures of degassing systems have been experimentally determined. The results obtained are the basis for further research on efficiency of creating gas hydrates from coalmine methane and determining its minimum permissible concentration in the gas mixture of degassing systems according to the technological and economic criteria of hydrate formation.
Parameters evaluation in the process of solid phase pulp sedimentation in technological units of beneficiation plants
Authors: Morkun V , Morkun N , Tron V , Serdiuk O , Bobrov Y , Haponenko A 
Published: November 2023

Abstract
The aim of the research is the analysis and modeling of the process of sedimentation of the solid phase of the pulp in the technological units of processing plants to assess the density of particles of crushed ore. The paper analyzes domestic and foreign experience; methods of mathematical modeling were used, as well as methods of mathematical statistics and probability theory for processing the results of experiments. Scientific novelty consists in developing and substantiating a method for estimating the density of crushed ore particles in the process of their sedimentation directly in the process units of beneficiation plants. Practical value consists in developing a methodology for determining the characteristics of the enriched raw materials, which make it possible to form the degree of grinding necessary for the full disclosure of mineral formations. It was proposed to use the density of ore particles as an indicator of changes in the quality characteristics of the ore received for beneficiation, which is determined on the basis of measurements of the attenuation of volumetric ultrasonic waves and Lamb waves propagating in the pulp and the wall of the technological sump that is in contact with it. These measurements must be synchronized with the results of measurements of the pulp level in the sump during its working operation. The proposed method makes it possible to dynamically correct the parameters of the model of a closed ore grinding cycle, depending on the quality characteristics of the feedstock, and thereby form the conditions for the full disclosure of inclusions of the useful component in the product entering the magnetic separation or flotation.
Groundwater treatment using polystyrene foam filters with upflow filtration
Authors: Martynov S , Orlova A , Zoshchuk V , Zoshchuk N , Minaeva N 
Published: November 2023

Abstract
The groundwater is less susceptible to anthropogenic influence and the water quality of these sources is more stable. At the same time, the groundwater often has an increasing iron concentration. Despite the sufficient availability of proven methods for iron removal from water, it becomes necessary to search for more resource and energy saving technologies which is due to the constant rise in the cost of resources for the construction and operation of water treatment plants. The aeration methods for the iron removal from groundwater are often used, as cheaper ones. The polystyrene foam filters with upflow filtration are of particular interest, as the most reliable in operation among the developed types of filters with floating medium. A further reduction the cost of water is possible by using granules of foam polystyrene obtained by a production method, which ensures an increased grain size in comparison with the traditional method of their obtaining. The positive experience in such filters implementation allowed to recommend the placement of iron removal equipment in the existing water towers.
Traditional settlements historic experience of “non-detached” preservation (cases of Shirakawa village Ogimachi in Japan and Kryvorivnia village in Ukraine)
Authors: Shevtsova G V 
Published: November 2023

Abstract
The article concerns of the comparative study of traditional settlements historic experience of “non-detached” preservation. “Non-detached” there is understood like a way to preserve the whole settlement on its original place, with its local traditions, community system, crafts and customs, and in the harmony with natural environment. The cases of the study are mountain Shirakawa village Ogimachi in Japan and Kryvorivnia village in Ukraine. The both settlements are generally showing very similar historical background of geographically isolated life in the harmony with high mountain nature that leads to the shaping of original local architecture style, cultural traditions and community features. Similarly, the initiative of revitalization in the both cases emitting from local communities. Nevertheless, the history of preservation and revitalization efforts of the two cases is quite different. While in Shirakawa village Ogimachi local community took revitalization efforts starting from the middle of 20th century, Kryvorivnia village was engaged in the process starting from the middle of 19th century just with some interruption due to the soviet times. Currently the both settlements achieved good results in their revitalization and local traditions preservation activity also keeping harmony with environment. Shirakawa village Ogimachi is mostly orientated on inner community life that is almost not intersected with flourishing local tourism. Contrary, Kryvorivnia allows tourists to participate freely in local community life, rituals and festivals. Thus each of the two cases examined finally found its original way of historical settlement culture sustainable preservation and revitalization.
Town-planning tasks and principles of restoration of urbanized territories of the Luhansk region, destroyed as a result of hostilities
Authors: Sokolenko K V , Sokolenko V M , Holodnov O I , Chernih O A 
Published: November 2023

Abstract
The war in Ukraine has led to large-scale destruction. The scale and nature of changes in the urban planning parameters of the Luhansk region under the influence of hostilities and the restoration of urbanized territories are studied. The purpose of the study is to determine the models and principles for the restoration of urban areas affected by hostilities. Theoretical and empirical methods of system and statistical analysis, analytical comparisons, urban planning analysis were used for the study. The paper considers the quantitative and qualitative nature of the impact of destruction and the socio-demographic and economic consequences caused by them on the change in the urban planning parameters of the Luhansk region. The information base consists of literary and archival sources, cartographic materials. The analysis of urban planning tasks for the restoration of urbanized territories destroyed as a result of hostilities is carried out. It is established that the war changed certain functions of the region. The task arises to determine how the change in functions affects the transformation of the territorial typology of the use of territories. The region is at the beginning of the phase transformation of the urban form. A methodology for assessing and making urban planning decisions is proposed. The urban planning tasks and directions for the restoration of the urbanized territories of the Lugansk region, destroyed as a result of hostilities, are analyzed. From the intermediate conclusions, it is advisable to single out that the region has significantly changed its functions. The military and special nature of the use of the territories will be a priority. So, the planning frame of the territory should undergo changes. It is necessary to revise and update general layouts, regional development schemes aimed at the advanced development of programs and projects that primarily ensure the structural growth of territories. The region will experience a labor shortage. So, recovery programs will face a shortage of builders. It is advisable to create and strengthen the departments of the chief architect of the city, expand the staff, to develop current and future tasks for the development of cities.
The current state of the Southern Bug River mouth ecosystem
Authors: Alokhina T M 
Published: November 2023

Abstract
The article considers the pre-war conditions main components of the Southern Bug mouth ecosystem. The results of sediments samples study have shown transformation of lagoonal accumulation, appearance of reducing condition spots in sediments, presence of exceeding MAP for lead. An estuarine water analysis given an idea about hydrochemical features mouth section of river, namely: high concentration of suspended solids – on an average 11,4 mg/dm3; increasable concentration BOD5 – an indicator of easily oxidized organic substances content; periodic significant exceeding MAC of ammonium and nitrite nitrogen. Hydrobiological changes primarily concern a decrease in primary productivity due to a decline in phytoplankton biodiversity; there was also a reduction of zooplankton. The current state of the Southern Bug River mouth ecosystem is formed predominantly under the periodic dredging of shipping channels followed by the formation silt dumps. The post-war revitalization of the Southern Bug estuary ecosystem should include measures to mitigate the negative effects of anthropogenic activity especially the consequences of hydraulic engineering works.