The scientific-technical journal 'Digital Technologies in Industry' specializes in publishing the latest research articles on the introduction of new technologies in the industrial sector, their practical applications, and innovative approaches. Our journal focuses on scientific research and technical studies in the fields of industrial process automation, artificial intelligence, digital control systems, and other advanced technologies. Our journal provides a platform for experts, scientists, and practitioners to share knowledge and experience on the successful implementation of modern technologies in industry. The scientific-technical journal "Digital Technologies in Industry" (e-ISSN: 3030-3214) is recommended, based on Resolution No. 358 of the Higher Attestation Commission under the Ministry of Higher Education, Science, and Innovation of the Republic of Uzbekistan dated July 30, 2024, for publishing the main scientific results of dissertations in the following specializations for candidates for the academic degrees of Doctor of Philosophy (PhD) and Doctor of Science (DSc) in technical sciences: ✅05.00.00 - Technical Sciences ✅04.00.00 - Geological and Mineralogical Sciences ✅02.00.00 - Chemical Sciences (E)ISSN: 3030-3214 DOI: 10.70769/3030-3214.SRT
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REAL-TIME MEASUREMENT OF COTTON MOISTURE BASED ON CHANGES IN THE DIELECTRIC PROPERTIES OF THE FIBER
Moisture control of raw cotton is a key factor in ensuring product quality in the light industry and plays an important role at all stages of the technological chain, from primary processing and transportation to warehouse storage. Modern electrical measuring devices based on the analysis of electrical resistance and dielectric properties of the material enable rapid and highly accurate determination of moisture content and can be readily integrated into automated and mechatronic control systems. This study provides a detailed analysis of the physical principles underlying the operation of electrical moisture meters, describes the specific features of their application in cotton processing technologies, examines their advantages and existing limitations, and identifies directions for further improvement. In addition, a module developed by the authors is presented that provides continuous real-time monitoring of cotton fiber moisture directly during the production process.
Copyright (c) 2026 Хамзаев, Д.И. (Автор) https://creativecommons.org/licenses/by/4.0
INVESTIGATION OF HYDROCHLORIC ACID MODIFICATION OF NAVBAHOR BENTONITE CLAY AND ITS PHYSICOCHEMICAL PROPERTIES
This study investigates the acid modification of bentonite clay from the Navbahor deposit using hydrochloric acid and evaluates its effect on the physicochemical properties of the material. Bentonite samples were activated with 0.1 M and 1.5 M HCl solutions, and changes in their chemical composition and surface morphology were examined using scanning electron microscopy (SEM). The results indicate that acid treatment significantly reduces the content of exchangeable calcium, sodium, and magnesium ions while preserving the primary crystal structure of montmorillonite. In addition, the formation of new pores on the bentonite surface enhances its sorption performance. The obtained findings demonstrate the potential of acid-modified bentonite as an effective adsorbent material for environmental and industrial applications.
Copyright (c) 2026 Husenov, A.O., Xadjibayev, D.A., Sabirov, B.T. (Muallif) https://creativecommons.org/licenses/by/4.0
SELECTION AND EVALUATION OF PROMISING BENTONITE DEPOSITS FOR THE PRODUCTION OF SORPTION MATERIALS USED IN INDUSTRIAL WASTEWATER TREATMENT
This paper investigates the selection and evaluation of promising bentonite deposits for the production of sorption materials intended for industrial wastewater treatment. The mineralogical composition and physicochemical properties of bentonite raw materials were analyzed, and their influence on adsorption performance was assessed. The results demonstrate that locally available bentonite deposits possess high sorption potential and can be effectively used for manufacturing sorbents capable of removing heavy metals and other pollutants from industrial wastewater, thereby improving environmental safety and resource efficiency.
Copyright (c) 2026 Husenov, A.U., Xadjibayev, D.A., Sabirov, B.T. (Muallif) https://creativecommons.org/licenses/by/4.0
MODERN HYDROMETALLURGICAL TECHNOLOGIES FOR THE PROCESSING OF COBALT-CONTAINING CAKES
The article analyzes modern hydrometallurgical methods for extracting cobalt from intermediate products of zinc production. Particular attention is paid to filter cakes with a cobalt content of 0.5–3.0% and a zinc content of 40–60%. The formation of these intermediate products, their environmental hazards, and the possibility of extracting cobalt, cadmium, and zinc from them through processing in the metallurgical industry are considered. Selective acid leaching, oxidative precipitation, and ammonia-sulfate leaching were compared. An analysis of previous research shows that controlling the pH and redox potential allows for the dissolution of over 90% of the zinc while retaining most of the cobalt in the solid residue. By oxidizing Co2+ to Co3+, it is possible to obtain a product containing over 50% cobalt and a solution with a residual metal concentration below 1 mg/L. Ozone at a pH of 4.0 ensures the precipitation of over 98% of the cobalt but incurs high operational costs. It is concluded that when selecting a technology, one must consider the selectivity of metal separation, reagent consumption, the feasibility of recycling solutions back into the production cycle, and the environmental consequences of processing the filter cakes.
Mining, Metallurgy, and Manufacturing Industry
Copyright (c) 2026 Эшонкулов, У.Х., Хасанов, А.С., Каршиев, Х.К. (Автор) https://creativecommons.org/licenses/by/4.0
STUDY OF THE MATERIAL COMPOSITION OF TECHNOLOGICAL SAMPLES OBTAINED FROM ASH AND SLAG WASTES OF THE ANGREN AND NOVO-ANGREN THERMAL POWER PLANTS
This paper presents the results of a comprehensive investigation into the material composition of technological samples obtained from ash and slag wastes of the Angren and Novo-Angren Thermal Power Plants. Chemical, mineralogical, granulometric, and ICP-MS analyses were carried out to determine the composition and technological characteristics of the samples. The contents of the major rock-forming oxides, including SiO₂, Al₂O₃, and Fe₂O₃, as well as valuable and rare elements such as molybdenum, bismuth, tellurium, selenium, palladium, gold, and silver, were evaluated. The obtained results demonstrate that the investigated ash and slag wastes possess favorable technological properties for integrated processing using gravity, magnetic separation, and flotation methods. The findings provide a scientific basis for the development of technologies aimed at recovering valuable components and utilizing thermal power plant wastes as secondary mineral resources.
04.00.00 - Geology and Mineralogy Sciences
Copyright (c) 2026 Almatov, I.M., Xatamov, G.A., Botirov, M.S., G‘ulomov, I.I. (Muallif) https://creativecommons.org/licenses/by/4.0
TECHNICAL AND ECONOMIC EFFICIENCY OF REDUCING EVAPORATION LOSSES DURING TANK STORAGE OF CRUDE OIL AT THE KOKDUMALAK FIELD
The paper evaluates evaporation losses of light hydrocarbon fractions from crude oil stored in the RVS-4000 No. 3 product tank at the Kokdumalak oil treatment facility. Annual losses caused by standing breathing, working breathing and reverse breathing were quantified, and the effect of tank filling–emptying frequency was examined. Reflective coating, reflector disk, a sealed internal floating pontoon and nitrogen blanketing were compared. Considering both technical performance and operational feasibility, the sealed pontoon was selected as the preferred option. Combined process optimization can retain 121 tonnes of oil per year and provide an annual economic benefit of USD 56,102, equivalent to UZS 718.106 million.
Copyright (c) 2026 Norqulov, S.S. (Muallif) https://creativecommons.org/licenses/by/4.0
STUDY OF THE VOLUME OF ASH AND SLAG DUMPS AT THE NEW ANGREN AND ANGREN THERMAL POWER PLANTS AND PROSPECTS FOR THEIR UTILIZATION
This paper investigates the volume, composition, and utilization potential of ash and slag disposal sites at the New Angren and Angren Thermal Power Plants. The accumulation of ash and slag waste, its environmental impact, and its potential as a secondary mineral resource are analyzed. The study evaluates the applicability of gravity, magnetic, and hydrometallurgical processing methods and reviews international experience in the efficient utilization of ash and slag waste. The results demonstrate that the integrated processing of ash and slag materials can reduce environmental impacts, improve resource efficiency, and enable the recovery of valuable metals and other useful components from technogenic waste.
Copyright (c) 2026 Almatov, I.M., Xatamov, G.A., Jabborov, E.Y., Sodiqov, F.S. (Muallif) https://creativecommons.org/licenses/by/4.0
INVESTIGATION OF TEMPERATURE REGIMES OF LARGE-SIZE TYRES OF MINING DUMP TRUCKS AND ANALYSIS OF THE CAUSES OF THEIR PREMATURE FAILURE IN THE CONDITIONS OF MINING ENTERPRISES OF UZBEKISTAN
The article is devoted to the operation of large-size tyres of mining dump trucks in the specific climatic and mining conditions of Uzbekistan, using the example of the Muruntau open-pit mine of "Navoi MMC" JSC and the facilities of "Qizilqumsement" JSC. A statistical analysis of the causes of premature tyre failure, including normal wear, mechanical damage, and thermal destruction, is presented. It is noted that tyre replacement costs constitute a significant part of the cost of transporting rock mass, while overheating causes rubber delamination and subsequent economic losses. The results of field measurements of the thermal state of wheels using a thermal imager and the K.O.D.A. system are presented. It is established that the thermal load is caused not only by solar radiation and hysteresis but also by heat transfer from the braking mechanisms through the wheel rim. Local zones of maximum heating in tyres have been identified. Three approaches to solving the problem are considered, including regulated technological breaks, continuous TPMS monitoring of pressure and temperature, and forced cooling. It is concluded that it is necessary to develop innovative heat dissipation systems to increase tyre resource.
Copyright (c) 2026 Istablаyev, F.F., Ataqulov, L.N., Jurayev, A.Sh. (Muallif) https://creativecommons.org/licenses/by/4.0
A STUDY ON THE EFFECT OF SODIUM CYANIDE AND GOLD CICADA REAGENTS ON THE EXTRACTION OF PRECIOUS METALS FROM ORE
This study investigates the process of extracting gold from the enrichment tailings of the Marjonbuloq deposit using glycine. The research evaluated the effects of glycine concentration, the solid particle content in the pulp, the catalytic effect of Cu2+ ions, and a preliminary oxidation process in the presence of manganese oxide on the efficiency of gold dissolution. The experiments revealed that a higher degree of gold dissolution is achieved in a relatively dilute pulp and under preliminary oxidation conditions. The results obtained demonstrate that glycine leaching is an environmentally safe and promising technology.
Copyright (c) 2026 Rahmonova, U.T., Xasanov, A.S., Saidaxmedov, A.A. (Muallif) https://creativecommons.org/licenses/by/4.0
CHARACTERISTICS AND ANALYSIS OF PROCESSING OPTIONS FOR ZINC-BEARING DUST FROM ELECTRIC ARC FURNACES
This paper presents the results of a comprehensive investigation into the physicochemical properties of electric arc furnace dust (EAFD), generated during steel production from scrap metal, with particular emphasis on its potential for zinc recovery. Dust samples collected from LI DA METAL TECHNOLOGY LLC were selected as the research material. The chemical composition, morphology, and particle size distribution of the samples were characterized using X-ray fluorescence (XRF), energy-dispersive X-ray spectroscopy coupled with scanning electron microscopy (EDS/SEM), and laser diffraction particle size analysis. XRF analysis revealed that the dust mainly consists of iron oxide (40.7 wt.%) and zinc oxide (15.2 wt.%), together with sodium, calcium, silicon, potassium, sulfur, manganese, and lead oxides. EDS results confirmed the predominance of iron, zinc, and oxygen, while particle size analysis indicated a fine-grained material with median and 90th percentile particle diameters of D50=11.455 μm and D90=34.573 μm, respectively. The elevated zinc content demonstrates the significant potential of EAFD as a valuable secondary raw material for resource recovery. Among the most promising recycling technologies are pyrometallurgical processing using the Waelz process and hydrometallurgical sulfuric acid leaching. The obtained results provide a scientific basis for the sustainable management of hazardous metallurgical waste, recovery of valuable metals, and implementation of circular economy principles in the steel industry.
Copyright (c) 2026 Jalolov, B.A., Mirzavaliyev, D.B., Qarshiyev, H.K., Kamalova, I.M. (Muallif) https://creativecommons.org/licenses/by/4.0
PREPARATION AND PERFORMANCE EVALUATION OF CELLULOSE–BASALT FIBER HYBRID COMPOSITES FOR THERMAL AND ACOUSTIC INSULATION
This study presents the development of cellulose–basalt fiber hybrid composite materials for thermal and acoustic insulation applications using cellulose derived from agricultural biomass. The composites were fabricated through mechanical mixing and compression molding, and their physical, mechanical, and structural properties were investigated. The results demonstrated strong interfacial bonding between the cellulose matrix and basalt fiber reinforcement, leading to the formation of a stable porous structure. The developed composites exhibited low density, satisfactory mechanical strength, good thermal insulation, and effective sound absorption performance. These environmentally friendly materials, produced from renewable resources, show considerable potential as sustainable insulation materials for modern construction and engineering applications, contributing to improved energy efficiency and reduced environmental impact.
Copyright (c) 2026 Sattorov, L.K., Kurbanov, A.A., Rahmatov, X.B., Jurayeva, H.Z. (Muallif) https://creativecommons.org/licenses/by/4.0
DEVELOPMENT OF A PURIFICATION TECHNOLOGY FOR PHARMACEUTICAL-GRADE SODIUM CARBOXYMETHYL CELLULOSE (NA-CMC) FROM MASHAR STEM CELLULOSE FOR MEDICAL GYPSUM APPLICATIONS
This study presents a technology for producing highly purified sodium carboxymethyl cellulose (Na-CMC) from cellulose extracted from locally available mashar stems for medical applications, particularly in the manufacture of medical gypsum. Technical Na-CMC was purified by ethanol extraction using a 53% aqueous ethanol solution, and the influence of extraction time on the purity and quality of the final product was systematically investigated. The optimum extraction time was found to be 40 min, resulting in a maximum main substance content of 99%. The physicochemical properties of the purified Na-CMC, including degree of substitution, dynamic viscosity, water solubility, and pH, were determined and compared with the requirements of relevant technical standards. X-ray diffraction (XRD) analysis confirmed the successful structural transformation of cellulose into Na-CMC through a reduction in crystallinity after carboxymethylation. The results demonstrate that mashar stem cellulose is a promising renewable local raw material for the production of pharmaceutical-grade Na-CMC with properties suitable for medical gypsum and other biomedical applications.
Copyright (c) 2026 Sattorov, L.X., Kurbanov, A.A., Rahmatov, X.B., Jurayeva, H.Z. (Muallif) https://creativecommons.org/licenses/by/4.0
TECHNOLOGY OF SELECTIVE LEACHING AND PROCESSING OF LEAD–BISMUTH SLUDGES FROM METALLURGICAL PRODUCTION
This paper presents the results of a comprehensive study of lead–bismuth sludges generated during sulfuric acid production in copper metallurgy. The physicochemical properties of the sludge, including moisture content, particle size distribution, density, and acidity, were investigated. The results confirmed the presence of significant amounts of lead, bismuth, copper, zinc, and precious metals, demonstrating the industrial value of the sludge as a secondary raw material. An efficient hydrometallurgical processing technology was developed, incorporating water washing, selective salt leaching, carbonation, and thermal treatment. Experimental studies showed that, under optimal operating conditions, lead was selectively transferred into solution while precious metals remained in the solid residue. High-purity metallic lead was subsequently obtained from the produced lead carbonate. The proposed technology promotes comprehensive utilization of metallurgical waste, reduces environmental impact, and improves resource efficiency.
Copyright (c) 2026 Mirzanova, Z.A., Eshonqulov, U.X., Vakkasov, B.A. (Muallif) https://creativecommons.org/licenses/by/4.0
COPPER PHOSPHIDE (Cu₃P): A MODERN REVIEW OF SYNTHESIS METHODS, ELECTROCHEMICAL PROPERTIES, AND ANTICORROSION APPLICATIONS
This review presents a comparative analysis of recent advances in the synthesis technologies, crystal structure, electrochemical properties, and anticorrosion applications of copper phosphide (Cu₃P)-based materials. Twenty peer-reviewed publications were critically evaluated to compare ionothermal, hydrothermal, mechanochemical, colloidal, vapor-phase phosphorization, and pyrometallurgical synthesis routes. The influence of synthesis strategy on phase composition, morphology, electrochemical performance, and corrosion resistance was systematically assessed. The analysis demonstrates that Cu₃P-based nanostructured materials exhibit significant potential for electrochemical energy storage, electrocatalysis, and industrial corrosion protection, making them promising multifunctional materials for sustainable engineering applications.
Copyright (c) 2026 Xoliqulov, D.B., Sharopova, D.Y. (Muallif) https://creativecommons.org/licenses/by/4.0
THERMODYNAMIC BASIS OF SELECTIVE ARSENIC REMOVAL FROM IRON OXIDE PIGMENTS OBTAINED FROM BIO-OXIDATION SOLUTIONS
This paper investigates the thermodynamic principles of selective arsenic removal from iron oxide pigments obtained from technogenic solutions generated during the neutralization of bio-oxidation products. The temperature dependence of Gibbs free energy for reactions involving sodium sulfide was analyzed to evaluate the thermodynamic stability of iron- and arsenic-containing compounds. The calculations demonstrated that arsenic-bearing phases readily transform into sulfide compounds, whereas iron compounds remain thermodynamically stable. The optimal temperature range for selective arsenic removal was determined to be 40–60 °C. The obtained results provide a scientific basis for improving environmentally friendly technologies for processing bio-oxidation solutions and producing iron oxide pigments with reduced toxic impurity content.
Copyright (c) 2026 Toshqodirova, R.E., Kenjayeva, S.A. (Muallif) https://creativecommons.org/licenses/by/4.0
ANALYSIS OF THE ROLE OF OXIDIZED COPPER ORES IN GLOBAL COPPER ORE RESERVES AND MODERN TECHNOLOGICAL SOLUTIONS FOR THEIR PROCESSING
Рост мирового спроса на медь обусловливает необходимость совершенствования технологий переработки окисленных и смешанных медных руд. Целью настоящего исследования является определение роли окисленных руд в мировых запасах медных руд, сравнительный анализ современных технологий их переработки на крупнейших медно-порфировых месторождениях мира, а также оценка перспектив их применения для месторождения Калмакыр. В работе использованы методы систематического анализа научной литературы, сравнительного анализа и аналитико-синтетического подхода. Установлено, что минералогический состав окисленных руд месторождения Калмакыр во многом аналогичен крупнейшим мировым медно-порфировым месторождениям, однако наличие промышленных содержаний золота и серебра, а также преобладание окисленных форм меди требуют адаптации зарубежных технологий к местным геолого-минералогическим условиям.
Copyright (c) 2026 Xoliqulov, D.B., Boltayev, O.N., Elchiyeva, M.D. (Muallif) https://creativecommons.org/licenses/by/4.0
INVESTIGATION OF THE EFFICIENCY OF COMBINED TECHNOLOGY FOR POLYMETALLIC ORE BENEFICIATION
This paper investigates the efficiency of recovering base and rare metals from polymetallic ores through the combined application of gravity and flotation beneficiation methods. The feed material obtained from a spiral classifier was first processed in a KNELSON gravity concentrator to achieve the preliminary concentration of free gold and heavy minerals. Subsequently, sulfide minerals were recovered by flotation, while the flotation tailings were further upgraded using a shaking table. The results demonstrate that the combined gravity–flotation processing scheme enhances the recovery of valuable components, reduces metal losses, and improves the overall efficiency of complex polymetallic ore beneficiation.
Copyright (c) 2026 Sidiqov, R.M., Ergashev, M.A., Axmadaliyev, A.M., Abdurazakov, U.M. (Muallif) https://creativecommons.org/licenses/by/4.0
THE HISTORY OF URANIUM AND PROSPECTS FOR THE DEVELOPMENT OF NUCLEAR ENERGY IN UZBEKISTAN
This paper examines the origin of uranium, the history of its discovery, and its contribution to the development of nuclear physics. It analyzes uranium enrichment technologies, recent trends in nuclear energy development, and Uzbekistan's strategic position in the global uranium market. Particular attention is given to modern uranium mining technologies, the activities of Navoiuran State Enterprise, the development of new uranium deposits, and the economic and energy significance of the Jizzakh Nuclear Power Plant project. The findings demonstrate Uzbekistan's steadily growing role in the global nuclear industry.
Copyright (c) 2026 Xasanov, A.S., Eshankulova, G.R. (Muallif) https://creativecommons.org/licenses/by/4.0
INVESTIGATION OF THE EFFECTS OF PH, CONTACT TIME, SORBENT DOSAGE, AND INITIAL CONCENTRATION ON THE ADSORPTION PROCESS
This paper investigates the main factors affecting the adsorption process, including solution pH, contact time, sorbent dosage, and the initial concentration of the adsorbate. Adsorption is considered one of the most effective methods for removing pollutants from wastewater, oil-contaminated water, heavy metal ions, and organic contaminants. The influence of the physicochemical properties of the sorbent, mass transfer mechanisms, and equilibrium conditions on adsorption efficiency is discussed. In addition, adsorption isotherms, kinetic models, and experimental design approaches are presented to evaluate and optimize the adsorption process.
Copyright (c) 2026 Turdiyev, J.Q., Kuyboqarov, O.E., Panjiyev, U.R. (Muallif) https://creativecommons.org/licenses/by/4.0
EFFICIENCY OF TECHNOLOGIES FOR INTENSIFYING THE PRODUCTION OF HYDROCARBONS AT THE DEPOSITS OF THE BUKHARA-KHIVA REGION
The article analyzes the efficiency of technologies of hydraulic fracturing, radial drilling and lateral drilling used to intensify hydrocarbon production at the fields of the Bukhara-Khiva region. Geological, physical and technological factors affecting the effectiveness of these technologies are identified, and well selection criteria ensuring improved efficiency are developed. The obtained results are of important scientific and practical significance for improving the development of oil and gas fields.
Copyright (c) 2026 Kilichev, I.K., Ibotov, O.K., Turdiyev, S.S., Matniyazov, O.P. (Muallif) https://creativecommons.org/licenses/by/4.0
IMPROVEMENT OF FOAM-GENERATING STICK TECHNOLOGY FOR REDUCING LIQUID LOADING IN GAS WELLS
In gas wells at the late stage of reservoir development, liquid loading is a common problem that significantly reduces production efficiency. This study presents an improved foam stick technology aimed at reducing liquid density and enhancing lifting efficiency. The methodology includes theoretical analysis, laboratory experiments, and field testing. The results show a reduction in liquid density by 35–45% and an increase in well productivity by 18–27%. The proposed technology is economically viable and effective for gas well deliquification.
Copyright (c) 2026 Rustamov, M.M. (Muallif) https://creativecommons.org/licenses/by/4.0
GEOLOGICAL-SEARCH CRITERIA FOR OIL AND GAS IN THE JURASSIC TERRIGENOUS DEPOSITS OF THE UMID FIELD OF THE CHARJOY STAGE
This article assesses the oil and gas potential of the Lower and Middle Jurassic terrigenous deposits of the Dengizkul uplift in the Bukhara-Khiva region based on geological-geophysical, lithofacies, and hydrodynamic criteria. The study investigates the lithological-stratigraphic characteristics of the terrigenous formation, depositional facies conditions, distribution of reservoir thicknesses, and the spatial occurrence of productive horizons. Zones of channel sandstone development with favorable reservoir properties were identified, and prospective horizons associated with anticlinal and lens-shaped traps were delineated. In addition, hydrodynamic anomalies favorable for the formation and preservation of hydrocarbon accumulations were recognized.
Copyright (c) 2026 Shoymurotov, T.X., Tog‘ayev, I.S., Alimov, M.M., Toshtemirov, S.A. (Muallif) https://creativecommons.org/licenses/by/4.0
A METHODOLOGICAL APPROACH TO STUDYING NEOTECTONIC STRUCTURE AND MOVEMENT OF REGIONS BASED ON A HIERARCHICAL TECTODYNAMIC MODEL
This study is devoted to the investigation of the formation and development patterns of neotectonic processes in the Central Eurasian region. A comprehensive analysis of deformation processes was carried out based on the integration of geodynamic, geodetic, and tectonophysical data. Using GPS observations, surface velocity fields were determined, and deformation rates along with their gradients were evaluated. The study applies a hierarchical tectodynamic model, allowing neotectonic processes to be analyzed as a unified system at global, regional, and local scales. The results indicate that deformation is not limited to plate boundaries but also extends into their interiors, with particularly high intensity observed in the Himalaya–Tibet and Zagros regions. Seismic data analysis revealed a strong correlation between earthquake distribution and deformation zones. The findings contribute significantly to the advancement of geodynamic modeling and provide a systematic framework for studying neotectonic processes.
Copyright (c) 2026 Dononov, J.U., Shamsidinova, G.U. (Muallif) https://creativecommons.org/licenses/by/4.0
SPATIAL AND DEPTH DISTRIBUTION CHARACTERISTICS OF GEOLOGICAL FAULTS
This study investigates the spatial and depth distribution characteristics of geological faults using fractal and statistical analysis methods. A random point distribution model and the Lévy flight fractal model were employed to simulate the spatial arrangement of fault systems. Based on the Lévy flight model, the probability density and distribution functions of inter-fault distances were determined, and the fractal dimension parameter was calculated. The results confirmed that the spatial distribution of geological faults and earthquake epicenters represents a complex structural-geodynamic system exhibiting self-similar fractal properties. A strong relationship was identified between the degree of fault clustering, spatial density, depth distribution, tectonic stress fields, and seismic activity. The influence of systematic factors, including coordinate errors, boundary effects, statistical sample size, and spatial projection, was analyzed during the estimation of the correlation dimension. It was demonstrated that reduced coordinate accuracy at small scales may lead to inaccurate estimation of fractal parameters. The application of statistical filtering and scale-parameter optimization methods improved the accuracy of distribution pattern assessment. The obtained results are of significant scientific and practical importance for identifying seismic hazard zones and evaluating the geodynamic state of regions.
Copyright (c) 2026 Dononov, J.U. (Muallif) https://creativecommons.org/licenses/by/4.0
INVESTIGATION OF THE THERMOPHYSICAL AND FIRE-RESISTANT PROPERTIES OF EPOXY POLYMER COMPOSITE COATINGS BASED ON BINARY FILLERS
This article investigates the thermophysical, thermomechanical, and fire-resistant properties of epoxy polymer composite coatings modified with binary fillers, mineral components, and intumescent flame-retardant additives. A heat-protective composite coating based on VEP-3 epoxy resin was selected as the research object. The thermal stability of the material was evaluated using differential thermogravimetric analysis, mass-loss kinetics, thermomechanical deformation, oxygen index, and smoke generation coefficient. The results showed that the VEP-3 sample exhibited an endothermic effect at 283.57 °C, while the total mass loss within the temperature range of 21.07–801 °C reached 48.285%. The optimal incorporation of flame retardants, vermiculite, carbon nanotubes, and intumescent additives increased the oxygen index from 17–19% to 35–38% and significantly reduced smoke generation. The obtained results confirm the potential of intumescent epoxy composite coatings as effective thermal and fire-protective materials.
Copyright (c) 2026 Rahmanqulov, A.A., Maxmanov, E.B., Xaydarov, T.Z., Ro‘ziyev, R.T. (Muallif) https://creativecommons.org/licenses/by/4.0
STRUCTURAL AND LITHO-STRATIGRAPHIC FEATURES OF THE JURASSIC CARBONATE FORMATION OF THE BOYSUN FLEX
This article analyzes in detail the geological structure of the Surkhandarya megasyncline and the features of Jurassic carbonate formations using the Boysun flexure as an example. The study provides information on the lithostratigraphic subdivision of the area, the tectonic structure, and prospective areas rich in oil and gas reserves, in particular the Gadjak field. It scientifically substantiates the relationship between subsalt layers and the rocks located above and below them. The article also presents descriptions of six separate formations belonging to the Jurassic period and comparative data on their thickness. Based on geophysical and drilling results, the possibilities for the formation of reef structures and hydrocarbon traps in the region are assessed.
Copyright (c) 2026 Alimov, M.M., Djalilov, G.G., Tog‘ayev, I.S. (Muallif) https://creativecommons.org/licenses/by/4.0
DEVELOPMENT OF THE POST-COLLISIONAL STAGE OF FOLD BELTS AND THE ORIGIN OF POST-COLLISIONAL GRANITOIDS
This article examines the evolution of fold belts during the post-collisional stage and the mechanisms responsible for the formation of post-collisional granitoids. Within the framework of the Wilson cycle, geodynamic processes following continental collision, including lithospheric delamination, gravitational collapse, rifting, and transcurrent faulting, are analyzed. The compositional characteristics, source regions, and geodynamic models of post-collisional magmatism and granitoid formation are also summarized.
Copyright (c) 2026 Axmedov, X.R., Abdusalomova, M.M. (Muallif) https://creativecommons.org/licenses/by/4.0
DEVELOPMENT OF A METHOD FOR CONTROLLING THE EVOLVENT TEETH PROFILE OF CYLINDRICAL WHEELS BASED ON MACHINE VIEW TECHNOLOGIES
A new method for controlling the involute profile of cylindrical gears based on machine vision technologies and three-dimensional geometric data processing is presented. The relevance of the study is explained by the need to resolve the contradiction between high accuracy, speed, and cost of measurements in existing approaches (coordinate measuring machines, optical, and comparative methods). The aim of the study is to develop a convenient, sufficiently accurate, and automated control method that does not require specialized gear measuring equipment or reference CAD models.
Copyright (c) 2026 Jo‘rayev, N.N., Ataullayev, A.O., Egamberdiev, I.P., Yaxshiyev, S.N. (Muallif) https://creativecommons.org/licenses/by/4.0
ANALYTICAL REVIEW OF SCIENTIFIC RESEARCH ON IMPROVING THE EFFICIENCY OF THE LINTERING PROCESS AND JUSTIFICATION OF THE RESEARCH DIRECTION
This article presents an analytical review of scientific research aimed at improving the efficiency of the lintering process. The advantages and disadvantages of existing linter designs were analyzed. The study revealed that the seed agitator design in the working chamber significantly affects process efficiency, and its improvement was substantiated as the main direction for further research.
Copyright (c) 2026 Nazirov, R.R., Karimov, M.R., Abduqahorov, N.O., Muxammadiyev, U.S. (Muallif) https://creativecommons.org/licenses/by/4.0
THERMOMECHANICAL ANALYSIS OF A ROTATING AXIS HOUSING TAKING INTO ACCOUNT THERMAL LOADS AND STRUCTURAL DEFORMATIONS IN A FIVE-AXIS CNC SYSTEM
This article presents a numerical study of the thermomechanical state of the rotary unit of a five-axis CNC machine. Using the finite element method, a coupled analysis of thermal fields and the resulting housing deformations was performed. Zones of maximum heating and their influence on the magnitude of spatial displacements were identified. The obtained results allow us to estimate the contribution of thermal factors to the positional error of the rotary axis.
Copyright (c) 2026 Ataullayev, A.O., Jo‘rayev, N.N., Egamberdiyev, I.P., Yaxshiyev, S.N. (Muallif) https://creativecommons.org/licenses/by/4.0