Lev Levin
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View article: Deep Learning Prediction of Exhaust Mass Flow and CO Emissions for Underground Mining Application
Deep Learning Prediction of Exhaust Mass Flow and CO Emissions for Underground Mining Application Open
Diesel engines power much of the heavy-duty equipment used in underground mines, where exhaust emissions pose acute environmental and occupational health challenges. However, predicting the amount of air required to dilute these emissions …
View article: Experimental determination of the ventilation pressure thermal drop effect on the air flows in the inclined mine workings
Experimental determination of the ventilation pressure thermal drop effect on the air flows in the inclined mine workings Open
The increasing use of mechanized facilities in underground mining operations, including conveyor systems, diesel and electric equipment, and rail transport, is driving the expansion into new mineral reserves, often accessed through incline…
View article: Numerical Analysis of the Impact of Variable Borer Miner Operating Modes on the Microclimate in Potash Mine Working Areas
Numerical Analysis of the Impact of Variable Borer Miner Operating Modes on the Microclimate in Potash Mine Working Areas Open
This paper addresses the numerical simulation of unsteady, non-isothermal ventilation in a dead-end mine working of a potash mine excavated using a borer miner. During its operations, airflow can become unsteady due to the variable operati…
View article: Ventilation of large section blind headings under conditions of changing ore load size
Ventilation of large section blind headings under conditions of changing ore load size Open
Relevance. The need to ensure safe working conditions in the working areas of underground mines. Stagnant zones with low air velocities can be formed in large section blind heading behind the ore bulk when ore is shipped by mining machines…
View article: Experimental and Numerical Study of Air Flow Reversal Induced by Fire in an Inclined Mine Working
Experimental and Numerical Study of Air Flow Reversal Induced by Fire in an Inclined Mine Working Open
Effective fire prevention in mine workings and tunnels requires a thorough theoretical analysis of the heat and mass transfer processes within these structures. This involves using established models to calculate non-isothermal air flow dy…
View article: Influence of soil salinity on the bearing capacity of the frozen wall
Influence of soil salinity on the bearing capacity of the frozen wall Open
The article describes the results of laboratory studies on the unfrozen water content and ultimate long-term strength of frozen clay and chalk samples in the temperature range from −10 to −25 °C. The soil samples contained dissolved salt i…
View article: Enhancing efficiency in the control of artificial ground freezing for shaft construction: A case study of the Darasinsky potash mine
Enhancing efficiency in the control of artificial ground freezing for shaft construction: A case study of the Darasinsky potash mine Open
Artificial ground freezing during mine shaft construction is a costly endeavor. For effective decision-making in mining operations, it's essential to establish robust control over frozen soil conditions. This control holds paramount import…
View article: Experimental and Theoretical Study of the Influence of Saline Soils on Frozen Wall Formation
Experimental and Theoretical Study of the Influence of Saline Soils on Frozen Wall Formation Open
This paper examines the impact of salinity on the thermophysical properties of soils during artificial freezing. It focuses on analyzing heat and mass transfer in saline soils for constructing a frozen wall around a mineshaft at a potash s…
View article: Development of Automated Mine Ventilation Control Systems for Belarusian Potash Mines
Development of Automated Mine Ventilation Control Systems for Belarusian Potash Mines Open
In recent decades, two different approaches to mine ventilation control have been developed: ventilation on demand (VOD) and automatic ventilation control (AVC) systems.The latter was primarily developed in Russia and the CIS countries.Thi…
View article: Mathematical Modeling of Air Distribution in Mines Considering Different Ventilation Modes
Mathematical Modeling of Air Distribution in Mines Considering Different Ventilation Modes Open
The calculation of air distribution in large mine ventilation networks is usually carried out by numerically solving a system of equations representing Kirchhoff’s circuit laws. This formulation of the problem traditionally only considers …
View article: Analysis of the structural integrity of a frozen wall during a mine shaft excavation using temperature monitoring data
Analysis of the structural integrity of a frozen wall during a mine shaft excavation using temperature monitoring data Open
This paper describes the results of the temperature monitoring of a frozen wall (FW) around the skip shaft of a potash mine under construction. The data on temperature measurements in control-thermal boreholes were used to parameterize the…
View article: Study of the Influence of Thermal Convection on Temperature Measurement in Thermal Control Boreholes during Artificial Ground Freezing
Study of the Influence of Thermal Convection on Temperature Measurement in Thermal Control Boreholes during Artificial Ground Freezing Open
This paper considers the problem of thermal convection of a calcium chloride solution in a vertical borehole. A non-uniform temperature distribution with a given vertical gradient is set at the walls of the borehole. The non-stationary tem…
View article: Parameterization of the Model of Artificial Clay Freezing Considering the Effect of Pore Water Salinity
Parameterization of the Model of Artificial Clay Freezing Considering the Effect of Pore Water Salinity Open
This paper considers the artificial freezing of an argillite-like clay layer containing a NaCl salt solution in its pore space. The experimental results of the thermophysical properties of the clay with various salinities and water content…
View article: Study on the Dust Content in Dead-End Drifts in the Potash Mines for Various Ventilation Modes
Study on the Dust Content in Dead-End Drifts in the Potash Mines for Various Ventilation Modes Open
This article deals with the reduction of dust content in the working areas of potash mines in the conditions of operating combines. This problem is topical, since the high dust concentrations in the atmosphere of dead-end drifts lead to th…
View article: Features of Adjusting the Frozen Soil Properties Using Borehole Temperature Measurements
Features of Adjusting the Frozen Soil Properties Using Borehole Temperature Measurements Open
The paper examines the theoretical issues of using borehole temperature survey data to control a frozen wall formed around the sinking mine shafts of the Nezhinsk mining and processing plant potash mine. We consider adjusting the parameter…
View article: Coupled thermo-hydro-mechanical modeling of frost heave and water migration during artificial freezing of soils for mineshaft sinking
Coupled thermo-hydro-mechanical modeling of frost heave and water migration during artificial freezing of soils for mineshaft sinking Open
Artificial freezing of water-bearing soil layers composing a sedimentary deposit can induce frost heave and water migration that affect the natural stress–strain state of the soil layers and freezing process. In the present paper, a thermo…
View article: Determination of technological parameters of rock freezing systems based on the condition of maintaining design thickness of ice wall
Determination of technological parameters of rock freezing systems based on the condition of maintaining design thickness of ice wall Open
Artificial freezing ensures the formation of a temporary ice wall around the shaft under construction, which prevents groundwater penetration into the shaft and increases the strength of rocks around the unsupported walls of the shaft unti…
View article: Automated ventilation control in mines. Challenges, state of the art, areas for improvement
Automated ventilation control in mines. Challenges, state of the art, areas for improvement Open
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 pr…
View article: Principles for selecting, training and maintaining skills for safe work of personnel for mining industry enterprises
Principles for selecting, training and maintaining skills for safe work of personnel for mining industry enterprises Open
Purpose. To reduce the risks of accidents and injuries on the basis of vocational selection of the stuff for work in the mining industry, as well as training and maintaining their skills of safe work. Methodology. To solve the problems con…
View article: Numerical Simulation of Coupled Thermo-Hydro-Mechanical Processes in Freezing Soils
Numerical Simulation of Coupled Thermo-Hydro-Mechanical Processes in Freezing Soils Open
In the study a thermo-hydro-mechanical model of freezing of saturated soil is presented, with focus on numerical simulation of artificial ground freezing (AGF). Artificial freezing of saturated soils induces such process in the soils as wa…
View article: Numerical simulation of vertical shaft sinking using artificial ground freezing
Numerical simulation of vertical shaft sinking using artificial ground freezing Open
Artificial ground freezing (AGF) is used worldwide for vertical shaft sinking in difficult hydrogeological conditions. The modern tendency is to determine the design parameters of the freezing technique based on numerical simulation. This …
View article: Numerical simulation of stress-strain state in frozen wall during thawing
Numerical simulation of stress-strain state in frozen wall during thawing Open
Blasting and drilling operations during shaft sinking assume switching off the freezing columns which can lead to stability loss of a frozen wall and inrush of thawed soil into the stope. This work assesses safety of shaft sinking when fre…
View article: The impact of working conditions on the functional state of employes in thermoshaft oil production
The impact of working conditions on the functional state of employes in thermoshaft oil production Open
The aim of the study was to assess the functional state of the autonomic nervous and cardiovascular systems of workers employed at the thermoshaft oil production. material and methods. Our test group No. 1 was consisted of operators dealin…
View article: Theoretical analysis of frozen wall dynamics during transition to ice holding stage
Theoretical analysis of frozen wall dynamics during transition to ice holding stage Open
Series of calculations for the artificial freezing of the rock mass during construction of mineshafts for the conditions of a potash mine in development was carried out. Numerical solution was obtained through the finite element method usi…
View article: Numerical simulation of cement grouting of saturated soil during a mine shaft sinking using the artificial ground freezing
Numerical simulation of cement grouting of saturated soil during a mine shaft sinking using the artificial ground freezing Open
Cement grouting is widely applied in geotechnical engineering to reinforce water saturated soil and to control groundwater. The present paper is devoted to a numerical study of cement grout injection in a soil stratum during a construction…
View article: Numerical analysis of application limits of Vyalov’s formula for an ice-soil thickness
Numerical analysis of application limits of Vyalov’s formula for an ice-soil thickness Open
Artificial ground freezing is an efficient technique which allows one to sink the mine shafts under complex hydrogeological conditions. The aim of artificial ground freezing is a creation of a temporary wall of frozen soil around the inten…
View article: Improving Methods of Frozen Wall State Prediction for Mine Shafts under Construction Using Distributed Temperature Measurements in Test Wells
Improving Methods of Frozen Wall State Prediction for Mine Shafts under Construction Using Distributed Temperature Measurements in Test Wells Open
Development of mineral deposits under complex geological and hydrogeological conditions is often associated with the need to utilize specific approaches to mine shaft construction. The most reliable and universally applicable method of sha…
View article: Numerical simulation of frozen wall formation in water-saturated rock mass by solving the Darcy-Stefan problem
Numerical simulation of frozen wall formation in water-saturated rock mass by solving the Darcy-Stefan problem Open
Artificial ground freezing (AGF) is a common technology of shaft sinking through water-bearing strata. The AGF technique is used to create a frozen wall preventing shaft flooding. An additional factor that makes shaft sinking more complica…