Mining Section Research Articles

Freshwater macroinvertebrate traits assessment as complementary to taxonomic information for mining impact detection in the northern Peruvian Andes

AbstractAimWe studied the distribution of freshwater macroinvertebrate taxa and traits to distinguish ecological gradients among the mining‐controlled and natural headwaters, and rural and urban economic activity influences.LocationIn 2016’s dry season, macroinvertebrate samples were collected at 40 locations in the Mashcon watershed, northern Peruvian Andes. Six locations were in the headwaters directly influenced by mining, eight near‐pristine tributary headwaters, 14 agricultural locations at midstream and 12 urban locations downstream.MethodsEight traits (five biological and three ecological) were selected according to data availability, and modalities scores were assigned using the weighted and the dominant‐trait approaches. The traits relative abundances and abiotic conditions were compared among watershed sections. The ecological interpretability of the ungrouped data was verified with a distance‐based redundancy analysis.ResultsThe high‐altitude mining section had fewer taxa types and abundance, and distinct body forms distributions and prevalent body sizes in macroinvertebrate communities, relatable to the control of the mining headwaters. Physiological and ecological traits (respiration, mobility and attachment, food sources, feeding habits, saprobity and pH preferenda) differed among traits quantification approaches and were less informative at high altitudes. The ecological conditions from the near‐pristine tributaries recovered in the vegetated midstream section, to again be affected in the downstream urban section.Main ConclusionsOur results suggest the presence of ecological impairment despite the excellent physicochemical quality of the water discharged by the mine. The obtainment of autecological information at a higher taxonomic resolution, e.g. for ubiquitous taxa like Acari and Chironomidae, would be needed to advance the freshwater quality assessment of ecologically and hydrogeochemically complex Andean mining ecosystems.

Flotation of sulfide lead-zinc ores of the Akzhal deposit

Ore samples from various sections of the underground mine at the Akzhal deposit were studied. The ore mineralization is relatively evenly distributed and is represented by pyrite, sphalerite, and galena. Studies were carried out to reduce the zinc content in the lead concentrate during selective flotation of sulfide lead-zinc ores. The possibility of adjusting the reagent regime using a mixture of zinc sulfate and sodium thiosulfate was studied. The findings indicate the optimal grinding fineness of 62 % –0.074 mm. This value ensures the most acceptable process indicators: the mass fraction of lead in the lead concentrate of 13.19 % with the recovery of 94.89 % and the mass fraction of zinc of 5.36 % with the recovery of 26.65 %. The mass fraction of zinc in the zinc concentrate is 26.54 % with the recovery of 54.41 %. Closed-cycle flotation of lead-zinc ore was conducted using 2 : 1 and 5 : 1 zinc sulfate and sodium thiosulfate mixtures as a depressant for zinc minerals in the lead cycle. With the first ratio, the mass fractions in the lead concentrate were 69.23 % for lead and 8.52 % for zinc and the mass fractions in the zinc concentrate were 57.60 % for zinc and 1.65 % for lead. With the second ratio, the mass fractions in the lead concentrate were 68.12 % for lead and 9.12 % for zinc (compare with 10.10 % with the plant inhouse reagent regime). The mass fractions in the zinc concentrate were 56.80 % for zinc and 1.72 % for lead.

Conifer-mixed tropical rainforest in the Indian Paleogene: New evidences from terpenoid signatures

The Paleocene sediments from Barsingsar lignite mine section of Bikaner-Nagaur Basin in Rajasthan, India were subjected to gas chromatography–mass spectrometry (GC–MS) analysis to resolve its botanical history in relation to its terpenoid composition. The terpenoid suite was characterised by sesquiterpenoids, diterpenoids, and sporadic triterpenoids. The presence of sesquiterpenoids along with drimane, norcadalenes, cadalenes and their related compounds hint to higher plant input. High abundance of diterpenoids and their temporal universality imply a significant gymnosperm input. The diterpenoid-class of terpenoids, primarly comprises of conifer-derived abietane, phyllocladane, kaurane, pimarane/isopimarane and podocarpane-class compounds. It further point to Southern Hemisphere conifer families, Podocarpaceae and Araucariaceae. Exceptional void of phenolic abietane and labdane derivatives rule out the probability of Pinaceae as the source of these terpenes. A very low abundance of pentacyclic terpenoids like oleanane-derivatives suggest low angiosperm-derived terpenoid contribution. The average value of pristane/phytane in the realm, 1.7 indicated oxic to suboxic depositional setting. The values of ar-AGI (aromatic Angiosperm/Gymnosperm Index), t-AGI 1 and t-AGI 2 spans over 0.01 to 1, 0.009 to 1.23, and 0.002 to 0.34 respectively for the section. The research provided evidence of the occurrence of a tropical rainforest where conifers were a significant element or remained a refugia in the midst of emerging angiosperms as life stabilized in the Paleogene after the devastating Cretaceous-Paleogene (K/Pg) boundary.

Application of a Microseismic Method of Rock Burst Risk Assessment under Blasting Mining in Ashele Copper Mine

Rock burst is a violent release of energy stored in the rock mass, which has been the focus of metal mine engineers. It gradually becomes a serious threat to both the mine’s workers and equipment. Rock burst risk assessment is a key issue in the prevention of rock burst. Based on the microseismic method for rock burst risk assessment that is used in tunnels, this paper presents a method of rock burst risk assessment for metal mines combining a simplified probability function and principal component analysis (PCA). Specifically, the size and details of key monitoring area and risk assessment units are determined according to the distribution of the fracture and driving stress during deep mining process. Based on the correlation analysis, six microseismic parameters are selected to be used for rock burst risk assessment. Simple linear functions are temporarily used to construct probability functions of each parameter before enough rock burst cases are collected. The method has been successfully used in the deep mining section of the Ashele Copper Mine (approximately 1000 m deep). Additionally, among various microseismic indicators, the energy release rate and cumulative energy are the greatest contributors to rock burst of different intensities. Therefore, the proposed method in this paper provides an important reference for the prevention and control of rock burst in metal mines.

Оптимизация схемы проветривания при увеличении производственной мощности подземного рудника

Currently, many underground mines are revising their design solutions to increase their production capacity. This tendency is explained by the decreasing ore grades, as well as by the extensive introduction of mechanization in underground mining operations that has improved the output of mobile equipment by increasing the box capacity and engine power. Dieselpowered mobile vehicles are the most common in underground mining practice. The advantages of such engines are obvious as they generate more power than other types of engines. However, the high air demand for mine ventilation limits their application. This is associated with the need to increase the cross-sections of permanent mine workings in order to comply with the standard air flow rate with account of the increased ventilation capacity along with an increase in the inventory of mobile equipment in order to ensure the specified output of the mine. The specific features of mining operations are defined by the stage-wise character of commissioning various blocks of the deposit. Managing of production and development works provides an opportunity to ventilate the mine sections due to their consecutive commissioning, locally, with an isolated stream of air by means of mine workings that do not have the intersection of air streams. This provides a reduction of critical path of air travel up to 30% and reduction of the general mine ventilating pressure drop by at least 20% at constant air flow rate. The results of the work can be used in designing the ventilation system of underground mines both under construction and in operation.

Design and Implementation of Automatic Drawing System for Geological Section

The geological section map uses the specified geological elements to express the characteristics and attributes of the geological body at a certain depth below the section line. By analyzing the functional requirements of the automatic geological section drawing system, the structure and functional modules of the system are designed in detail. The system was developed with AutoCAD as the platform and C# as the development language with the help of CAD secondary development technology. Taking the geological section of Xishimen iron ore mine as an example, the system proved to be efficient in drawing the section, and significantly improved the speed and quality of the section drawing.

Analysis on safe thickness of the horizontal separation pillar in the upward horizontal slicing and filling method

In the mines employing the upward horizontal slicing and filling mining method, it is necessary to set up a horizontal separation pillar in the middle transportation section. Too small a separation pillar may cause the roof to fall in the lower stope, damaging the transportation facilities in the middle section, and affecting the mining safety. Conversely, excessive thickness of the separation pillar will lead to the waste of mineral resources, reducing the economic benefits; therefore, the parameter optimization of horizontal separation pillar in the mining area remains a major safety and technical issue in upward horizontal slicing and filling mining. Taking the separation pillar in the middle section of an iron mine as the research object, various methods, including engineering analogy, theoretical calculation, and numerical simulation were used to comprehensively analyze the stability characteristics of the horizontal separation pillars with different thicknesses and determine the optimal thickness. For the stope with a span of 15–30 m mined with upward horizontal slicing and filling method in domestic and foreign mines, the thickness of horizontal separation pillar is 20–30 m, as analyzed using the engineering analogy method. Based on various theoretical formulas, such as the thickness-span ratio method, load transfer intersection line method, structural mechanics method, and others, the safety thickness of the separation pillar is calculated as 12–24 m with a safety factor of 1.50. According to a numerical calculation model established on the basis of measured drawings of stope and haulage roadways, the minimum safe thickness of the separation pillar is calculated as 23 m by the finite element analysis for typical sections. Based on the rock mass conditions and mining status of the iron mine, the thickness of horizontal separation pillar in the middle mining area is recommended to be no less than 23 m through a comprehensive analysis of empirical analogy, theoretical calculation, and simulation verification. The analysis results can provide a reference for the subsequent structural parameter adjustment and have a guiding significance for improving the comprehensive economic benefits of the mine.

Pre-incident planning of fires in underground hard rock mines: old and new risks

Fires in underground mines may pose a challenge to fire and rescue personnel where the complex environment and multiple influences of a fire are poorly considered during pre-incident planning. A better knowledge of pre-incident planning in underground mines would improve the safety of personnel. This study on pre-incident planning in underground mines applied data from experiments, inventories and design fire studies. A number of questions were considered related to information sources, fire modelling, capturing complexity and using fire scenarios. When performing fire modelling, empirical models could be used to complement other modelling tools. The study found that for modelling of spatially extensive mine sections, the use of ventilation network-based mine fire simulations could be a better option. Using an analytical toolbox, an iterative testing of plans and an ongoing planning process, the pre-planning challenges for a mine can be mitigated. The purpose of this study was to examine existing pre-incident planning and propose information sources, tools and specific actions for future plans.

Onboard air curtain dust removal method for longwall mining: Environmental pollution prevention

Owing to the increasing production capacity of longwall mines, dust pollution has become more severe, in particular, in the working area of the shearer driver. Thus, it is urgent to improve the environment of longwall mines. A new onboard air curtain dust control method is proposed, which adopts the idea of partial closed dust control. The improved Euler-Lagrange model is conducted to simulation the dust diffusion characteristics with and without air curtain. The results show that two high-speed air curtains form on both sides of the working area of the shearer driver after the application of this control method. These air curtains can isolate the dust and reduce the dust concentration in the working area of the shearer driver by 69.40%. Simultaneously, the dust concentrations in most areas of the longwall mining section are reduced. Therefore, this paper presents a new, useful method for dust prevention at a longwall mining section.

The superposition characteristics of primary halo in the Daping gold deposit, Yunnan Province, China and its significance for exploration

One of main issues in geochemical exploration is that primary haloes of some deeply buried mineral deposits cannot be investigated, or that anomalies of these haloes are too weak to be analyzed. The superposition characteristics of the primary haloes can help us to identify the axial variation of the indicator elements in ore bodies more easily, and then provide a strong indication of the presence of buried ore bodies. This study uses multi-element lithogeochemical data (n = 924) to study the primary haloes of the Daping gold mineralization and the elements associated with the mineralization. First, correlation coefficient matrix was used to study the correlation among the elements in the samples with an Au grade greater than 1 ppm, and the results were used to study the element combination of the deposit. Secondly, Gregorian's method was used to calculate the axial zonality series of the indicator elements. Then, based on the content of 18 elements in 11 existing middle mining sections, the axial variation of the indicator elements was studied. Finally, based on the concentration zonality of the elements and the axial variation of the indicator elements, four deep targets of No.V1-2-3 gold-bearing quartz vein were proposed. Buried ore bodies were found by two boreholes in the No. II predicted target area, which demonstrated usefulness of the methods in this study. The results of this paper provide an example for the application of the superposition characteristics of primary haloes in deep mineral exploration for similar types of gold mineralization in other areas.

Terreneuvian bio- and chemostratigraphy of the South Sichuan Region (South China)

Classical sections, such as the Maidiping and Daqiao Mine sections of South Sichuan (China), expose early Cambrian deposits that are crucial for understanding the biological and environmental evolution of Yangtze Craton. These sequences are rich in Terreneuvian small shelly fossils, which can be assigned to assemblages I and III from South China. The Anabarites trisulcatus – Protohertzina anabarica Assemblage Zone (Assemblage I) is recognized at the lower Maidiping Formation. The second assemblage ( Paragloborilus subglobosus – Purella squamulosa Assemblage Zone) cannot be verified in South Sichuan, although previous reports claimed its existence based on the occurrence of Paragloborilus subglobosus . The third assemblage ( Watsonella crosbyi Assemblage Zone) is confirmed in the upper Maidiping Formation. The abundant bioclasts in this interval indicate abrasions and bioerosions by winnowing or starved sedimentation. Carbon isotope values from the Maidiping section present no negative excursion at the presumed Ediacaran–Cambrian transition. A positive carbon isotope excursion is observed in the Upper Maidiping Formation (Assemblage III) which is correlated to the ZHUCE excursion in the Dahai Member of eastern Yunnan. The shallow-water deposits of South Sichuan can be correlated with the South China, western Mongolia and Siberia successions based on biozonations and carbon isotope trends. Supplementary material: Isotope data are available at https://doi.org/10.6084/m9.figshare.c.5326834 Thematic collection: This article is part of the Advances in the Cambrian Explosion collection available at: https://www.lyellcollection.org/cc/advances-cambrian-explosion

Research on short wall continuous mining technology with full roof falling and roof control measures

Short wall mining technology is an important method to coal resource mining in the United States, Australia and other countries, and also one of important methods to boundary coal resource recovery in China. Short wall mining technology through leaving a large number of coal pillars to support and control roof, induces a series of accidents, such as large area roof suspended, collapse and shock, which restricts the further popularization and application of short wall mining technology seriously. By improving the existing short wall mining technology, the article proposed short wall continuous mining technology with full roof falling, and designed measures to control roof. The main research work is as follows: (1) By reducing and eliminating coal pillars in mining section as much as possible, including entry protecting pillar and pillar between caverns, also ensured stability of roof during mining period at the same time; after mining, roof can be collapse, to prevent large area roof suspended and collapsed inducing shock accidents; mining process and equipment of short wall continuous mining technology with full roof falling, were designed comprehensively. (2) Measures to control roof of short wall continuous mining technology with full roof falling are designed, using self-moving hydraulic support to control roof of mining cavern, anchor bolt and cable to ensure branch and cross entries stable during mining period, and forced caving technology to control large area roof suspended; (3) Short wall continuous mining technology with full roof falling and roof control measures were successfully industrialized in 42,210 boundary coal face of Yujialiang coal mine, which belong to Shenhua energy group in Inner Mongolia. The research result is significant to enrich and develop short wall mining technology.

Automated ventilation control in mines. Challenges, state of the art, areas for improvement

The article is divided into three main parts. The first part provides an overview of the existing literature on theoretical methods for calculating the optimal air distribution in mines according to the criteria of energy efficiency and providing all sections of mines with the required amount of air. It is shown that by the current moment there are many different formulations of the problem of searching the optimal air distribution, many different approaches and methods for optimizing air distribution have been developed. The case of a single (main) fan is most fully investigated, while for many fans a number of issues still remain unresolved.
 The second part is devoted to the review of existing methods and examples of the automated mine ventilation control systems implementation in Russia and abroad. Two of the most well-known concepts for the development of such systems are automated ventilation control systems (AVCS) in Russia and the CIS countries and Ventilation on demand (VOD) abroad. The main strategies of ventilation management in the framework of the AVCS and VOD concepts are described and also the key differences between them are shown. One of the key differences between AVCS and VOD today is the automatic determination of the operation parameters of fan units and ventilation doors using the optimal control algorithm, which is an integral part of the AVCS.
 The third part of the article describes the optimal control algorithm developed by the team of the Mining Institute of the Ural Branch of the Russian Academy of Sciences with the participation of the authors of the article. In this algorithm, the search for optimal air distribution is carried out by the system in a fully automated mode in real time using algorithms programmed into the microcontrollers of fans and ventilation doors. Minimization of energy consumption is achieved due to the most efficient selection of the fan speed and the rate of ventilation doors opening and also due to the air distribution shift control and the partial air recirculation systems introduction.
 It is noted that currently the available literature poorly covers the issue related to emergency operation modes ventilation systems of mines and also with the adaptation of automated control systems to different mining methods. According to the authors, further development of automated ventilation control systems should be carried out, in particular, in these two areas.

Simulation of the power supply system of the coal mine section

At present, the designing of a power supply system for mine sections is performed in accordance with obsolete regulatory documents made in the early 90s of the 20th century. This slows down the implementation of the ‘digital mining operation’ concept and prevents the full potential for energy savings from being realized. At the same time, development of digital technologies makes the issues of computer simulation of the power supply system of the coal mine sections urgent. Simulating computer modelling is required to develop measures for increasing the efficiency of the power supply system of operating coal mines as well as for designing new coal mines. The article offers the methodology of forming simulation computer models for evaluation of the energy efficiency of the power supply system for a coal mine section. To ensure the correct development of active and reactive power consumption profiles, it is proposed to use scenario approach to modelling dynamic processes. As an example of using the proposed approach, one of the scenarios for the operation of power supply system of a mine section at one of the coal mines of Kuzbass is reviewed here. The proposed approach to scenario modelling of operating modes of a mine section ensures the correct modelling of dynamic processes for the subsequent assessment of the effectiveness of the use of intelligent devices for controlling the flows of active and reactive power, which will make it possible to accurately assess the effect of FACTS devices on the level of active power losses, as well as the quality indicators of the electrical energy. The proposed methodology can be used in the development of computer-aided design systems for the design of energy-efficient power supply systems for extraction areas.

Analysis of Roof Failure at the Intersections on a Coal Mining

The objective of this paper is to understand the behavior of the roof and the cause of roof failure of a coal mining. Eleven roof falls occurred in the mine section in sequence. All the roof falls were surveyed, and the geological features were determined which include rock type, mechanical properties, and thickness. The immediate roof thickness was interpolated to determine the cause of the roof failures which was the inappropriate roof support where the immediate roof is thicker. The average thickness of the immediate roof was determined by the drilling log in 1.2 m (3.9 ft.). The roof support was design based on the average thickness, and the bolt length is 1.5 m (4.9 ft.) in suspension. The challenge was to estimate where the immediate roof gets thicker and to design the support considered to maintain the regular bolt length. This is because the cost and productivity of support operation could increase if the bolt length changes as the roof thickness changes. The idea was to adjust the support for beam building with a fully grouted bolt and rearrange the bolt geometry to keep the roof stable. It means, with the same bolt length the type of roof support would change from suspension to beam building depending on when the roof gets thicker. Two empirical approaches were considered to design the roof support: 1) CMRR and 2) RMR. The entry width is 5 m and the roof support was designed with four bolts per row. Where the roof support must change to beam building, the number of bolts per row changes to five or six. The results of the design and application on underground showed that the approach keeps stable.

Research on Stress Analysis and Control of Surrounding Rock of Trapezoidal Roadways Based on Complex Variable Theory

Aiming at the problem of the serious deformation of the mining roadways in the trapezoidal section of the coal mine, the method of combining theoretical analysis and field application is used to study the surrounding rock control method of the trapezoidal roadways. The conformal mapping function of the trapezoidal roadways is calculated by the theory of complex change, and then from the analytical solution of the tangential stress distributed in the surrounding rock of trapezoidal roadways which is under the influence of the bidirectional unequal pressure, homogeneous, isotropic, and elastic rock mass is obtained. Research studies show that the roof‐stress distribution of the trapezoidal roadways is uniform and the confining pressure is small, while the two sidewalls and the floor are opposite. The stress distribution of the two sidewalls and the floor varies greatly, and the stress concentration factor is large. The top corner of the trapezoidal roadways is basically not affected by stress concentration, but the stress concentration coefficient at the bottom corner is relatively large, and reinforcement measures are required in the roadway support. Based on the aforementioned research results, the multisupport scheme of “bolting with wire mesh and anchor cable + W‐type steel belt + joist steel shed support + anchor cable grouting” was proposed to the surrounding rock of trapezoidal roadways with large stress caused by mining influence, thus solving the actual mining problem.

Rational parameters of the transportless technological scheme for the development of strata with maximum permissible dip angle

In this article the rational value of overburden cut width and thickness of transportless overburden at mining of two dispersed flat seams IV-V and VI at Kureinsky section of Sibirginsky open pit mine are presented, which makes it possible to minimize the volume of rock re-excavation under the condition of the planned annual productivity of coal on the open pit and to ensure reduction of stripping costs. This task is complicated by the fact that the dip angle at the section is close to the limit on the condition of the possibility of spoiling of internal dump, and since the overburden rocks of the section are represented mainly by large-block sandstones on the clay cement and siltstones and their compressive strength is 60-80 MPa, then it is required to use a drilling and blasting method of their preparation for excavation. Under such conditions, optimizing the parameters of the transportless excavation scheme is of special importance for effective mining of the section.

ОЦІНКА СТІЙКОСТІ ВІДКАТНИХ ШТРЕКІВ КРУТИХ ВУГІЛЬНИХ ПЛАСТІВ ПРИ СПОСОБІ ОХОРОНИ ДЕРЕВ’ЯНИМИ КОСТРАМИ

Purpose. To evaluate the impact of overburden protection structures, in the form of wooden fires, on the stability of lateral rocks in the coal massif and the operational condition of the preparatory workings on the excavation section of the coal mine, which develops layers of steep fall. Methods. An integrated approach was used as a research method, which included conducting a mine experiment, equivalent modeling and interpretation of the obtained results. Results. The stability of retractable drifts on excavation sections was evaluated by the amount of convergence of the side rocks on the production contour, taking into account the deformation characteristics of the protection structures. During the full-scale experiment, when the change in the distance between the benchmarks on the contour of the retractable lane in the area affected by the cleaning works was recorded, the largest displacements of the side rocks were recorded from the roof. At a distance of l≥60 m behind the treatment face, the relative deformation of the protection structures reached ε = 0.5-0.6. After that, the increase in roof displacements was limited, and the superstructure supporting structures operated in the mode of increasing resistance. During laboratory research, in the process of compressing models of wooden fires and rolling fires from sleepers, their deformation characteristics were established. At uniaxial compression of models there was a consolidation of experimental samples. With an increase in the compressive force and relative deformation of the experimental samples, a simultaneous change in the modulus of deformation and stiffness of the simulated security structures by quadratic dependence was recorded. Scientific novelty. It is experimentally proved that in the zone of influence of treatment works the convergence of lateral rocks on the contour of the retractable road of the steep coal seam under protection by wooden fires along the length of the excavation section is limited after compression of security structures by 50-60% due to their compaction. the layout of the elements and their number, determine its rigidity. Practical significance. To ensure the stability of retractable drifts on mines that develop steep fall layers, it is necessary to focus on the use of flexible protective structures located above the drift and performing the function of load-bearing supports, which by changing the deformation characteristics provide smooth deflection of lateral rocks in the coal massif. Keywords: steep fall of coal seams, haulage gate, side rocks, security structure, deformation characteristics, rigidity.

Trajectory via-point generation for autonomous mobile manipulation using 3D LiDAR data

In this work, an approach to generating a set of via points for use in manipulator trajectory path planning is presented. The approach was developed for use on a robotic underground mining system, particularly for the task of autonomous application of a sprayable concrete called shotcrete. A LiDAR (light detection and ranging) scanner on a nodding head produces point clouds that are used as the input for the via-point selection algorithm. The algorithm generates a set of position and orientation via points that the manipulator must follow to perform the shotcreting task. The developed algorithm has been successfully tested on an autonomous mobile-manipulator system in a scaled mock-up of an underground mine. The main advantage of this algorithm is the ability to generate via points for any section of an underground mine in any position relative to the robot.

Results of Testing of a New Type of Mine Ventilation Stopping in the Potash Mine Production Area

The design of a new type of mine ventilation stopping designed for the configuration of a mine workings driven by Ural-20R combine, which is widely used in the potash mines of the Verkhnekamsk potash-magnesium salt deposit is described in the article. The materials from which the prototype of the mine ventilation stopping was made, in terms of their characteristics, corresponded to the requirements established as a result of mathematical and computer modeling. The stopping bearing frame made of AD31T1 duralumin alloy is able to withstand temperatures of 470–510 °С. The fire-prevention cloth for the prototype is made of BT-11 basalt fabric, which is used at temperatures from –250 to 650 °С. Methodology was developed for testing a mine ventilation stopping in the mining section of a potash mine, which simulates a change in the air flow pressure and its speed due to the action of natural draft that occurs during fire in a mine. The article describes the results of tests of a prototype mine ventilation stopping in the operating mine BKPRU-2 (PAO Uralkali), which confirmed the following theoretical assumptions. The developed mine ventilation stopping allows to reliably isolate the mine working area from the passage of air mass and flue gases, i.e., either isolate the fire source from fresh air entering it, or protect the working area from the penetration of flue gases into it. At the same time, the construction of the shaft ventilation stopping does not require a compressor or other device for pumping air that requires an electric power source, since the air hose will be inflated with a compressed air balloon. These factors will allow the construction of a mine ventilation stopping in a short period of time (not more than 20 min.) by the forces and means of miners before the arrival of paramilitary mine rescue units.