Gas Filtration Research Articles

Potential of PN Reduction in Passenger Cars with DPF and GPF

Particle number concentration (PN) in vehicle exhaust and ambient air describes the number of ultrafine particles (UFPs) below 500 nm, which are recognized as a toxic and carcinogenic component of pollution and are regulated in several countries. Metal nuclei, ash, and organic matter contribute significantly to the ultrafine particle size fraction and, thus, to the particle number concentration. Exhaust gas filtration is increasingly being used worldwide to significantly reduce this pollution, both on diesel particulate filter (DPF) and gasoline particulate filter (GPF) engines. In recent years, the EU has also funded research projects dealing with the possibilities of retrofitting gasoline vehicles with GPFs. This paper presents the results and compares the PN emissions of different vehicles. An original equipment manufacturer (OEM) diesel car with a DPF is considered as a benchmark. The PN emissions of this car are compared with a CNG car without filtration and with gasoline cars equipped with GPFs. It can be concluded that the currently used GPFs still have some potential to improve their filtration efficiency and that a modern CNG car would still have remarkable possibilities to reduce PN emissions with an improved quality GPF.

Осесимметричная задача фильтрации газа в пороупругой среде

The formulation and solution of the problem of burying carbon dioxide (carbon dioxide) in a poroelastic medium are considered. The model is based on the equations describing the filtration of liquids or gases in deformable porous media, which are a generalization of Muskett Leverett's models of poroelastic media. The assumption that the speed of movement of the solid skeleton of the medium is small made it possible to reduce the system of constitutive equations to two equations so that the effective pressure and porosity can be found. The gas filtration area refers to a rock formation in which an injection well is located at depth, and, on the sides, the formation is confined by impermeable rocks. The top of the formation coincides with the Earth surface and is permeable. The migration of carbon dioxide and its release to the surface occurs due to an increase in porosity at the top of the formation. Based on these assumptions, boundary conditions for the velocities of the gas and solid phases are set and then rewritten in terms of the desired function of the effective pressure of the medium. The resulting initial boundary value problem is solved numerically using a scheme of alternating directions and the fourth-order Runge-Kutta method. A difference scheme and an algorithm for solving the problem are given. The orders of uniform convergence in spatial and temporal variables were determined, and an approximate estimate for the rate of convergence of the numerical solution was obtained. Numerical modeling of several options for injecting carbon dioxide into the formation at different well depths and with different injection rates was carried out. Optimal gas injection conditions for its long-term geological storage were determined.

Conductive and convective combustion modes of granular mixtures of Ti–C–NiCr

The combustion modes of powder and granular mixtures (100 – X)(Ti + C) + XNiCr (X = 0–30%) containing Ti powders of different dispersion with different amounts of impurity gases in them were investigated. The experimental setup provided filtration of impurity gases released during combustion in the cocurrent direction or through the side surface of the sample. The difference between the experimental burning velocities of powder mixtures with titanium of different fineness is explained using a convective-conductive combustion model. For granular mixtures based on Ti powder with a characteristic size of 120 μm, it was shown that combustion occurs in the conductive mode. Comparison of the combustion velocities of granular mixtures containing Ti powder with particles of a characteristic size of 60 μm in the absence and presence of gas filtration through the sample indicates the transition of combustion to the convective regime. The necessary and sufficient conditions for the transition from conductive to convective combustion are formulated, which makes it possible to determine the composition of the mixture whose combustion occurs in the boundary region. In mixtures based on Ti with a particle size of 60 μm, the conductive combustion regime is observed during the combustion of granules 0.6 mm in size and a mixture with X = 30% of granules 1.7 mm in size. For mixtures with X = 0–20% with granules 1.7 mm in size, burning in the convective regime, the interfacial heat transfer coefficients were evaluated using experimental data. Their values are more than an order of magnitude higher than the theoretical ones. The XPA results of the combustion products showed that in order to obtain synthesis products without side phases of intermetallic compounds, it is necessary to use finely dispersed titanium powder.

ASPECTS OF RELIABILITY, EFFICIENCY AND ENERGY SAVING OF GAS PIPELINES AND GAS SUPPLY SYSTEM EQUIPMENT

To ensure the safe operation of gas pipelines of the gas supply system it is necessary to solve the problems of timely detection and elimination of leaks, as well as to determine the volume of natural gas leaks. The most complicated case is the leakage from underground gas pipelines, as gas filtration into the ground, its spreading from the leakage place and accumulation in underground cavities are determined by many factors. Natural gas leaks, in addition to losses, may cause damage to buildings and structures, threat to human health and life due to burning or explosion of the gas-air mixture, financial and economic costs in case of gas shortages, and fines for consumers. Thus, the causes of failures are mainly corrosion wear and local defects of various origins on the walls of gas pipelines, which reduce the capacity of gas pipelines, as well as deteriorate the physical condition of the pipe metal - causing its fatigue under prolonged exposure to operational loads. The listed causes of failures, except for the last one, are well studied. The methods of local defects detection are developed, which will contribute to the improvement of the process of operation and repair and restoration technologies of gas pipelines. In contrast to the existing approaches, the approach presented in the article assumes improvement of the process of operation and repair and restoration technologies of gas distribution networks on the basis of local defects detection methods developed by the authors and improvement of their reliability taking into account the data on the actual technical condition and characteristics of each group of reliability indicators of elements of gas distribution networks.

Neural operators for hydrodynamic modeling of underground gas storage facilities

Objectives. Much of the research in deep learning has focused on studying mappings between finite-dimensional spaces. While hydrodynamic processes of gas filtration in underground storage facilities can be described by partial differential equations (PDE), the requirement to study the mappings between functional spaces of infinite dimension distinguishes this problem from those solved using traditional mapping approaches. One of the most promising approaches involves the construction of neural operators, i.e., a generalization of neural networks to approximate mappings between functional spaces. The purpose of the work is to develop a neural operator to speed up calculations involved in hydrodynamic modeling of underground gas storages (UGS) to an acceptable degree of accuracy.Methods. In this work, a modified Fourier neural operator was built and trained for hydrodynamic modeling of gas filtration processes in underground gas storages.Results. The described method is shown to be capable of successful application to problems of three-dimensional gas filtration in a Cartesian coordinate system at objects with many wells. Despite the use of the fast Fourier transform algorithm in the architecture, the developed model is also effective for modeling objects having a nonuniform grid and complex geometry. As demonstrated not only on the test set, but also on artificially generated scenarios with significant changes made to the structure of the modeled object, the neural operator does not require a large training dataset size to achieve high accuracy of approximation of PDE solutions. A trained neural operator can simulate a given scenario in a fraction of a second, which is at least 106 times faster than a traditional numerical simulator.Conclusions. The constructed and trained neural operator demonstrated efficient hydrodynamic modeling of underground gas storages. The resulting algorithm reproduces adequate solutions even in the case of significant changes in the modeled object that had not occurred during the training process. The model can be recommended for use in planning and decision-making purposes regarding various aspects of UGS operation, such as optimal control of gas wells, pressure control, and management of gas reserves.

DEVELOPMENT OF A PROGRAM FOR CALCULATING THE PREDICTED OPERATION TIME OF GAS FILTERS

Objective: Development of software to calculate the predicted duration of protective action of gas filters for gas masks and respirators under specific operating conditions. Methods: The program for determining the predicted breakthrough time of gas filters was created using the integrated development environment Visual Studio Code. The algorithm embedded in the program is based on the mathematical equations of Wheeler-Jonas and the conversion of concentrations of chemical compounds into different dimensions. The real breakthrough time of gas filters was established on a laboratory stand for determining the absorption capacity, which meets the requirements of DSTU EN 14387:2021, and also provides the opportunity to use four test substances during testing, such as cyclohexane, sulfur dioxide, hydrogen sulfide or ammonia. Results: A software package was developed to calculate the predicted breakthrough time of gas filters for gas masks and respirators under specific operating conditions. It consists of four modules: initial data input, memory, output and visualization of information, and calculation of breakthrough time of gas filters. An algorithm for calculating the predicted level of filters breakthrough time was developed, which includes five steps: determining the hazard, concentration of harmful substances, required respirator protection class, humidity and air temperature, mode of operation; entering initial data for calculation; preliminary selection of a filter from the specified catalog located in the memory module; calculation of filter capacity and analysis with permissible values of the chemical substance with the calculation of breakthrough time; visualization of results and their storage in the memory module. Novelty: Establishing the dependency of the predicted breakthrough time of FRPA-G A1, B1, K1 filters on varying concentrations of chemicals in the air and the type of work performed, which allowed identifying a five-fold reduction in filter operation time during heavy work compared to light work. Practical Value: Results obtained by comparing the predicted breakthrough time using the developed software product with the programs of personal protective equipment manufacturers showed an error not exceeding 10%, due to the lack of accounting for uneven wear of the filter filler across its surface. Keywords: adsorption, gas filter, software, breakthrough time, substance concentration.

Preliminary Studies on the Utilization of Silicomanganese Slurry

Abstract Silico-manganese sludges are a waste resulting from the ferroalloy industry, more precisely from the manufacture of silico-manganese. From a technological point of view, they come from the sludge resulting from the filtration of furnace gases. From a chemical point of view, they are made up of a large number of combinations of manganese and silicon. The manganese content varies widely between 5-35% MnO. Due to the fact as there are limitations for the manganese content in waters and soils, the presence of these sludge deposits constitutes a permanent risk of environmental contamination. In addition to the definitive closure (greening) of the deposit, there is also the possibility of valorizing this waste. The present paper presents the preliminary research carried out to identify a sustainable technology for the recovery of useful elements from the sludge.

Thermal effect in shock-induced gas filtration through porous media

Thermal effect in shock-induced gas filtration through porous media

Advanced oxide-stabilized zirconia ceramics for flue gas filtration in air purification systems

Air pollution, largely driven by industrial activities and fossil fuel combustion, poses a critical threat to both the environment and public health. Addressing emissions, particularly from factories operating at extremely high temperatures, demands advanced filtration technologies capable of withstanding such severe conditions. Ceramic filters have emerged as a promising solution due to their superior thermal stability, chemical resistance, and mechanical durability. Among these, oxide-stabilized zirconia (OSZ) ceramics have garnered significant attention for their potential in high-temperature flue gas filtration. OSZ ceramics enhance the intrinsic properties of zirconia, such as its high melting point and mechanical strength, while stabilizing its phases to prevent performance-degrading phase transformations. This review comprehensively examines the role of phase transformations in ZrO2 materials, alongside the fabrication methods, structural characteristics, and advantages of ZrO2 ceramics in air filtration applications. The review examines various stabilizing agents used to maintain phase stability and optimize material performance under extreme conditions, highlighting the benefits of OSZ in flue gas filtration. Additionally, it covers recent advancements in OSZ synthesis and application, addressing critical limitations such as production challenges and the environmental impacts of large-scale use. The discussion emphasizes the move toward sustainable development in air filtration technologies. Finally, the review provides a forward-looking perspective on future research needs, aiming to further optimize OSZ ceramics for more effective and widespread industrial air pollution control, with a focus on improving performance, scalability, and environmental sustainability.

Multiscale understanding of structural effect on explosive dispersal of granular media

Explosive dispersal of granular media widely occurs in nature across various length scales, enabling engineering applications ranging from commercial or military explosive systems to the loss prevention industry. However, the correlation between the explosive dispersal behaviour and the structure of dispersal system is far from completely understood, thereby compromising the prediction of the explosive dispersal outcome resulting from a specific dispersal system. Here, we investigate the dispersal behaviours of densely packed particle rings driven by the enclosed pressurized gases using coarse-grained computational fluid dynamics–discrete parcel method. Distinct dispersal modes emerge from the dispersal systems with vastly varying sets of the macro- and micro-scale structural parameters in terms of the dispersal completeness and the spatial uniformity of the dispersed mass. Further investigation reveals the variation in the dispersal modes arises from the collective effects of multiscale gas–particle coupling relationships. Specifically, the macroscale coupling dictates the cyclic momentum/energy transfer between gases and particle ring as an entirety. The mesoscale coupling relates to the inter-pore gas filtration through the thickness of the particle ring, leading to the mass/energy reduction of the explosive source. The microscale coupling involves the individual particle dynamics influenced by the local flow parameters. A persistent macroscale coupling results in an incomplete dispersal which takes the form of an aggregated annular band, whereas the meso- and micro-scale couplings alter the macroscale coupling to a different extent. By incorporating the effects of the variety of structural parameters on the multiscale gas–particle coupling relationships, a non-dimensional parameter referred to as the modified mass ratio is constructed, which shows an explicit correlation with the dispersal mode. We proceed to establish a dispersal ring model in the continuum frame which accounts for the macro and meso-scale coupling effects. This model proves to be capable of successfully predicting the ideal and validated failed dispersal modes.

Fabrication of high-performance SiC ceramic membranes modified using in situ grown mullite whiskers and high-temperature filtration

The gas permeance and particle removal efficiency of silicon carbide (SiC) membranes are the most important performance indicators for high-temperature gas filtration. The rational design of SiC membrane microstructure has a positive impact on the improvement of performance indicators. This work prepared SiC membranes modified by in situ grown mullite whiskers, optimized their preparation conditions and investigated their performance improvement. The membrane suspension composition and sintering temperature were optimized using Taguchi’s method and gas permeance as the target. The thickness of the membrane was regulated by adjusting the spraying cycles and solid content in membrane suspension. Results showed that best membrane performance was obtained when the content of sintering aids, MoO3, and AlF3·3H2O were 8, 12, and 12 wt%, respectively; the solid concentration in membrane suspension was 30 wt%; the number of spraying cycles was 2, and the temperature was 1350 °C. The resulting membrane obtained a pore size of 5.8 µm and the Darcy's permeability coefficient k was 8.58 × 10−12 m2. It also had good interfacial adhesion and thermal shock and corrosion resistances. The membrane achieved a PM2.5 removal rate of more than 99.9 % at room temperature and high temperatures (100 °C–400 °C) with a low pressure drop below 1.4 kPa. Overall, the SiC ceramic membranes are prospective candidates for dust-laden gas filtration at high temperatures.

High-Temperature-Resistant Dual-Scale Ceramic Nanofiber Films toward Improved Air Filtration.

Currently, air pollution primarily arises from industrial emissions, coal combustion, and automobile exhaust, posing significant challenges for mitigation. This highlights the urgent need for advanced and efficient filtration materials with low pressure drop and high-temperature resistance. Traditionally, improving filtration property has involved increasing the thickness of the filtration materials, which consequently leads to higher costs. Here, dual-scale mullite nanofiber (MNF) films containing interwoven thick nanofibers (606 nm) and thin nanofibers (186 nm) are prepared using solution blow spinning. The dual-scale structure design enables the films to maintain a low pressure drop while achieving high filtration efficiency. At an airflow velocity of 5.3 cm s-1, the films with an areal density of 3.8 mg cm-2, achieve a filtration efficiency of 98.23% and a pressure drop of 141 Pa for PM0.3. In addition, the MNF films exhibit excellent flexibility and high-temperature resistance, making them have great potential for use in high-temperature flue gas filtration.

Comprehensive investigation of flue gas component separation and CO2 sequestration in water-saturated porous media of subsurface formation

Flue gas poses subsurface direct storage inefficiency due to its high non-CO2 content, while surface separation, desulfurization and denitrification processes require additional equipment and financial resources. To address these challenges, flue gas subsurface component separation and CO2 sequestration within aquifer were proposed in this paper. CO2 migrates notably slower than N2, leading to the gathering of N2 at gas flooding front and the occurrence of CO2 hysteresis during flue gas filtration within the aquifer. The phenomenon, characterized by gas composition deviations from the original injection mole fractions of N2 and CO2, is referred to as the flue gas component separation. Numerical simulation results indicate that the solubility difference between N2 and CO2 is the primary force driving the separation of components, and the asynchronous filtration velocities of the gas and aqueous phases further promote the separation. Thus, simultaneous N2 separation and CO2 storage can achieve by the optimized gas-water alternate injection, and the efficiencies of N2 separation and CO2 storage are inversely correlated. Increasing N2 mole fraction within the injected flue gas enhances the efficiency of N2 separation, while having a slight effect on CO2 storage. Water vapor in flue gas condenses and integrates into the liquid phase, while O₂ component is produced slightly later than N₂, leading to a marginal reduction in N₂ separation efficiency. The synergistic influences of aquifer temperature and pressure exhibit bidirectionality, stemming from the shift between the dominant factors between CO2 dissolution and gas sweep efficiency. Conditions of relatively lower aquifer temperatures and moderate pressures, particularly in medium permeability aquifers, are more favorable for enhancing N₂ separation and CO₂ storage. This proposal method holds the potential for efficient subsurface separation of flue gas components and concurrent underground storage of CO2, thereby contributing to the reduction of greenhouse gas emissions and mitigation of climate change.

Co-sintering fabrication of ceramic whiskers enhanced SiC membranes for high-efficiency dust-laden gas filtration

Application of silicon carbide (SiC) ceramic membrane in industrial dust-containing gas filtration has been widely explored. However, its limited gas permeance and complex sintering process hinder its application. In this work, two types of SiC whisker-reinforced ceramic membranes, namely, whisker ceramic membranes (WCMs) and whisker/particle composite ceramic membranes (WPCMs), were prepared using a co-sintering process. By optimizing the co-sintering temperature and SiC whisker contents, defect-free and uniform ceramic membranes were obtained. The mean pore size of WCMs was 12.2 μm with a gas permeance of ∼ 478.0 m3·m−2·h−1·kPa−1. The WPCMs exhibited a mean pore size of 3.3 μm with a gas permeance of ∼ 288.0 m3·m−2·h−1·kPa−1. SiC whiskers interlaced and connected within membranes, forming a network structure that not only effectively prevented delamination or deformation of the membrane during the co-sintering process but also significantly enhanced the gas permeance of membranes. Additionally, SiC whiskers improved the overall bending strength of membranes and enhanced the rejection of dust particles in the dust-laden gas. The resulting WCMs and WPCMs showed excellent chemical stability and thermal shock resistance. Moreover, the optimized membranes achieved a removal efficiency of 99.99 % for macro (15 μm), micro (2.5 μm), and nano (300 nm) solid particles in the dust-laden gas. This work fabricated high-performance SiC whisker-reinforced membranes that were particularly suitable for gas purification.

Көмір шахталарында өндірілген кеңістіктерден метанның бөлінуі

The sources of methane release into the workings of coal mines are the coal seams and interlayers being developed and the host rocks, methane from which is released into both preparatory and treatment workings [1]. A forecast is made about the possibility of moving methane from the mined-out spaces in coal mines to the daytime surface. A comprehensive analytical method has been developed to determine the most likely places of displacement. The regularities of the change in the velocity of movement depending on the temperature, pressure, specific gravity and viscosity of migrating hydrocarbon gases are established. Methane has the highest viscosity. The fracturing coefficient of rocks affecting gas filtration in dry and watered rocks has been revealed. Based on the research, the probable locations of methane migration are substantiated.

A novel approach to designing compact cyclones for efficient natural gas filtration

This paper presents an innovative method to design cyclone separators based on geometrical principles, and incorporates a coupling iterative algorithm to obtain crucial parameters. The proposed approach allows for simultaneous variation of multiple key parameters, including inlet velocity, inlet height, and pressure drop. Thus, effects of varying one parameter on the others are accounted for. The innovative methodology is utilized to design a novel, high-performance cyclone potentially applicable in natural gas filtration. The introduced cyclone has a uniquely large inlet length to diameter ratio and a small curved cone, making it compact and usable in clusters to handle large flow rates. The cyclone is experimentally tested to evaluate its filtration performance. The results indicate that six micron or larger particles are completely separated, and a cut point diameter of 1 μm is achieved. Finally, the introduced cyclone is numerically investigated to analyze the gas flow behavior and visualize particle trajectories.

Optimization of cleaning process in semiconductor gas delivery system by computational fluid dynamics simulation

Purging specialty gas delivery systems in semiconductor industries are essential for ensuring worker safety and complying with stringent environmental regulations. The cleaning process impacts production costs due to the required resources and time. This study introduced and evaluated various purging methods, combining vacuum, vacuum with purge, pressurization, and pressure-gradient purge steps. Considering the density and viscosity of various specialty gases used in semiconductor manufacturing, such as gaseous NH3, HCl, WF6, and SiCl4, were selected as the representative specialty gases for the system. Considering the utilization of the semiconductor industries, ultra-high purity nitrogen was selected to clean all components of the gas delivery system, including gas channels, filters, pressure regulator and diaphragm valves. Efficiency was measured by monitoring residual gas concentration changes during different purge-step configurations, the number of purge configuration, and step durations. The dynamic behavior of specialty gases was analyzed based on geometric factors and chemical properties. Findings indicated that cleaning dead-end zones was particularly challenging and impacting overall system efficiency. Frequent purge with a short step time proved more effective in removing residual chemicals than the present conventional vacuum purge process with a continuous N2 supply. Employing a pressure gradient between the inlet and outlet enhanced cleaning efficiency. These insights provide valuable guidelines for optimizing purging processes to reduce cleaning time and resource consumption in semiconductor manufacturing.

VUV absorption spectra of water and nitrous oxide by a double-duty differentially pumped gas filter.

The differentially pumped rare-gas filter at the end of the VUV beamline of the Swiss Light Source has been adapted to house a windowless absorption cell for gases. Absorption spectra can be recorded from 7 eV to up to 21 eV photon energies routinely, as shown by a new water and nitrous oxide absorption spectrum. By and large, the spectra agree with previously published ones both in terms of resonance energies and absorption cross sections, but that of N2O exhibits a small shift in the {\tilde{\bf D}} band and tentative fine structures that have not yet been fully described. This setup will facilitate the measurement of absorption spectra in the VUV above the absorption edge of LiF and MgF2 windows. It will also allow us to carry out condensed-phase measurements on thin liquid sheets and solid films. Further development options are discussed, including the recording of temperature-dependent absorption spectra, a stationary gas cell for calibration measurements, and the improvement of the photon energy resolution.

Justification of the Locations of Differential Pressure Sensors for Coarse and Fine Filter Elements Installed one Inside the Other in a Single Gas Filter Housing

Statement of the problem. The relevant task of ensuring the uninterrupted operation of modern gas pressure reduction systems is to develop and comprehensively substantiate the possibility of using two-stage filters for natural gas purification in gas reduction points and theoretically substantiate the method for calculating the pressure drop in cylindrical filter elements (CFE). Results. It is proved that when gas flows in the upper cross section of the filter, the pressure drop will be less than in lower cross sections, including the pressure drop in the lowest cross section. This leads to a larger amount of leaking gas, to a larger mass of impurities settling in the lower part of the filter elements of cylindrical coarse and fine cleaning and to a greater degree of their clogging. Therefore, it is recommended to place gas pressure sensors in the lower part of the internal volume of the coarse and fine-cleaned CFE, so that the flow direction of the coarse and finely purified gas washing the sensors at the location of the hole for measuring statistical pressure is tangential to the side surface of the sensor tube. Then the flow direction of the roughly and finely purified gas entering the holes of the sensors is carried out at an angle of 90° and the pressure gauges measure the static pressure. Conclusions. The locations of pressure drop sensors on coarse and fine filter elements installed one inside the other in a single gas filter housing are substantiated. The proposed arrangement of differential pressure sensors will significantly increase the possibility of receiving an earlier signal about the degree of clogging of the gas filter at the control room, as well as have a significant amount of time for timely removal of blockages formed in the coarse cleaning CFE and replacement of fine cleaning CFE.

Rock bolt and frame support of mine workings with a compound cross-section: Collective refuge chambers for mine workers

Purpose is to study the influence of mining and geological conditions on the time-dependent stability of the collective refuge chamber for mine workers with the adjacent mine workings and develop support schemes for different conditions of construction of such mine workings. Methods. Numerical modelling methods of the connected processes of elastoplastic deformation of gas-bearing rocks and gas filtration within the area disturbed during mining operations were used to study stability of mine workings with a compound cross-section, i.e. the collective refuge chambers and its adjacent extraction gallery. The model was based on fundamental principles of solid mechanics and filtration theory. The problem was solved using a finite element method. Findings. A classification of the conditions for locating collective refuge chambers for mine workers according to the relative strength of the enclosing rocks was developed. Support schemes for the chamber and its adjacent mine working were elaborated. The schemes include basic support and provide for its strengthening with rock bolts located in the roof of the mine working and chamber, or in their walls. The compliance of these support schemes with the developed classification of location conditions was determined. A numerical study of the time-dependent stability of the chamber and its adjacent mine working, while applying the recommended support scheme, was performed. It is shown that the strengthening of rock bolting schemes reduces the multicomponent stress field and the area of the zone of inelastic deformations, forms a rock-bolt overlap in the roof of the mine workings and chambers, which helps increase their stability under the complicated mining and geological conditions. Originality. Dependence of the changes within the area of a zone of inelastic deformations around the chamber with its adjacent mine working on the relative strength of the enclosing rocks was identified; time-dependent changes within the area of the zone of inelastic deformations, when using different support types, were specified. Practical implications. Support schemes for collective rescue chambers for mine workers in terms of different construction conditions were developed along with the procedure of their selection for specific mining and geological conditions. The results of the study provide theoretical substantiation and scientific guidelines for the selection of supports for collective refuge chambers adjacent to the mine working.