Sergei Sabanov - Academia.edu (original) (raw)
Papers by Sergei Sabanov
IEEE Geoscience and Remote Sensing Letters, 2023
Proceedings of the Estonian Academy of Sciences, 2005
This paper deals with the stability analysis and design of working mining blocks in Estonian oil ... more This paper deals with the stability analysis and design of working mining blocks in Estonian oil shale mines, where the room-and-pillar mining with blasting is used. The pillars are arranged in a singular grid. Calculations are performed using the concepts of critical area and conditional thickness, and the sliding rectangle method. The results are presented in the form of conditional thickness contours. For practical applications, the criterion of the conditional thickness difference is used. It guarantees safety and minimal losses of the mining block. The method is applicable in different geological conditions, where the room-and-pillar mining is used.
Social Science Research Network, 2023
The post mining processes impacts on the environment, economy and people, whilst there may be pos... more The post mining processes impacts on the environment, economy and people, whilst there may be positive contributions to the economy and social progress through mining there may also are negative impacts to the environment. The aim of this study is to elaborate sustainability assessment methodologies suitable for mine closure life cycle stage which allows defining hazardous influences on environment, society and economic dimensions, and helps quickly, conveniently and qualitatively solve, operate, find optimum variants for existing problems. The sustainability assessment methods will provides best decisions on the technological and post technological processes of a mining industry and can be used in the exploration, planning, exploitation and closure stages
CRC Press eBooks, Jun 28, 2023
Energies
The amount if oil shale resources throughout the world has been roughly estimated in accordance w... more The amount if oil shale resources throughout the world has been roughly estimated in accordance with various resource estimation methods. However, in some instances, detailed and comprehensive supporting methodologies for the estimation of commercial shale oil reserves have not been presented. The goal of this study is to develop a comprehensive method for the modified estimation of oil shale mineable reserves for shale oil projects. The methodology characterises oil shale according to its calorific value, oil content, conditional organic mass, and ash content by utilising a Monte Carlo simulation. Based on the results of the case study, the developed method proposes considering the relationships of the in situ oil shale grade and tonnage material (oil shale + limestone) to the oil retorting feed material grade and tonnage by taking into account the retorting plant oil recovery. For this purpose, a Monte Carlo stochastic modelling algorithm was developed. Based on the data analysis,...
The post mining processes impacts on the environment, economy and people, whilst there may be pos... more The post mining processes impacts on the environment, economy and people, whilst there may be positive contributions to the economy and social progress through mining there may also are negative impacts to the environment. The aim of this study is to elaborate sustainability assessment methodologies suitable for mine closure life cycle stage which allows defining hazardous influences on environment, society and economic dimensions, and helps quickly, conveniently and qualitatively solve, operate, find optimum variants for existing problems. The sustainability assessment methods will provides best decisions on the technological and post technological processes of a mining industry and can be used in the exploration, planning, exploitation and closure stages
The standard approach to open pit mine design typically applies a pit optimization process follow... more The standard approach to open pit mine design typically applies a pit optimization process followed by basic scheduling within the defined final pit limit. Often, as a result of this process, the mine operates at a higher strip ratio during the initial period and moves towards a lower strip ratio to the end of the mine life. The impact of this is an annual production schedule that does not follow a sequence that maximizes the net present value (NPV). The objective of this paper is to compare and contrast the standard and pushback approaches for open pit mining, with the aim of demonstrating that a pushback approach is practical and can increase the NPV of a project. The pushback method minimizes the stripping ratio in the early years and defers some of the equipment purchasing until later in the mine life. The results of the study show that the project NPV can be increased by the application of pushbacks by delaying and smoothing capital expenditure on equipment and waste stripping ...
Proceedings of the Estonian Academy of Sciences. Engineering, 2005
Proceedings of the 3rd World Congress on Mechanical, Chemical, and Material Engineering, Aug 1, 2022
Indoor Air, 2022
Our knowledge of the effects of exposure to indoor ultrafine particles (sub-100 nm, #/cm3 ) on hu... more Our knowledge of the effects of exposure to indoor ultrafine particles (sub-100 nm, #/cm3 ) on human brain activity is very limited. The effects of cooking ultrafine particles (UFP) on healthy adults were assessed using an electroencephalograph (EEGs) for brain response. Peak ultrafine particle concentrations were approximately 3 × 105 particle/cm3, and the average level was 1.64 × 105 particle/cm3 . The average particle number emission rate (S) and the average number decay rate (a+k) for chicken frying in brain experiments were calculated to be 2.82 × 1012 (SD = 1.83 × 1012 , R2 = 0.91, p = 0.0013) particles/min, 0.47 (SD = 0.30, R2 = 0.90, p < 0.0001) min-1 , respectively. EEGs were recorded before and during cooking (14 min) and 30 min after the cooking sessions. The brain fast-wave band (beta) decreased during exposure, similar to people with neurodegenerative diseases. It subsequently increased to its pre-exposure condition for 70% of the study participants after 30 min. The brain slow-wave band to fast-wave band ratio (theta/beta ratio) increased during and after exposure, similar to observed behavior in early-stage Alzheimer's disease (AD) patients. The brain then tended to return to its normal condition within 30 min following the exposure. This study suggests that chronically exposed people to high concentrations of cooking aerosol might progress toward AD.
The paper deals with the problems of aggregate testing and introduces first test results of all-i... more The paper deals with the problems of aggregate testing and introduces first test results of all-in aggregates. Also it is expected that testing method is applicable for waste materials in mining. Currently, nowadays there is not enough experience in experimental methods for defining conductivity and its setting limits, which could be used anywhere in Europe. Vertical conductivity test method may be any indirect method and its requirements may be placed by the benefit rules. From the current thesis topic test results may be used for research in other EU countries. Used standards for test equipment are valid throughout the EU.
Estonian Journal of Engineering, 2008
The processes of immediate roof exfoliation and pillars collapse is accompanied by significant su... more The processes of immediate roof exfoliation and pillars collapse is accompanied by significant subsidence of the ground surface. Ground surface subsidence causes soil erosion and flooding, swamp formation, agricultural damage, deforestation, changes in landscape, ground water level decreasing and the formation of unstable cavities. For the last four years a new blasting technology with great entry advance rates (EAR) has been introduced in an experimental mining block. By improved blasting technique the EAR reached 4 m; it is twice greater in comparison with usual technology, but emulsion explosive volume is twice higher and explosion occurs for 4.5 seconds (about 15 times longer than with the old technology). As a result of such greater advance rates, unsupported room lengths up to 5.5 m with decreasing stability of the immediate roof (IR) can be expected. In this paper the analysis of the IR stability using the deformation criteria for a new room-and-pillar mining technology with modern machinery at "Estonia" mine is presented. The analysis of the IR stability is based on the on-site underground testing by using benchmark stations and convergence measurements. The target of this study is to determine the impact of the vibration on the roof and pillars stability using the risk assessment method. Risk analysis on the basis of available earthquake data is also carried out.
Contents of abnormal oil in the Russian oil balance is constantly increasing. Transportation of a... more Contents of abnormal oil in the Russian oil balance is constantly increasing. Transportation of abnormal oil is very difficult process. This paper describes the possibility to change the rheological properties of the abnormal oil. This is a impact on oil by ultrasound with different power. Oil treated by ultrasound with changes in temperature and with the various dilutions addition. There are water, light hydrocarbons and chemical demulsifier. The research results are analyzed.
IEEE Geoscience and Remote Sensing Letters, 2023
Proceedings of the Estonian Academy of Sciences, 2005
This paper deals with the stability analysis and design of working mining blocks in Estonian oil ... more This paper deals with the stability analysis and design of working mining blocks in Estonian oil shale mines, where the room-and-pillar mining with blasting is used. The pillars are arranged in a singular grid. Calculations are performed using the concepts of critical area and conditional thickness, and the sliding rectangle method. The results are presented in the form of conditional thickness contours. For practical applications, the criterion of the conditional thickness difference is used. It guarantees safety and minimal losses of the mining block. The method is applicable in different geological conditions, where the room-and-pillar mining is used.
Social Science Research Network, 2023
The post mining processes impacts on the environment, economy and people, whilst there may be pos... more The post mining processes impacts on the environment, economy and people, whilst there may be positive contributions to the economy and social progress through mining there may also are negative impacts to the environment. The aim of this study is to elaborate sustainability assessment methodologies suitable for mine closure life cycle stage which allows defining hazardous influences on environment, society and economic dimensions, and helps quickly, conveniently and qualitatively solve, operate, find optimum variants for existing problems. The sustainability assessment methods will provides best decisions on the technological and post technological processes of a mining industry and can be used in the exploration, planning, exploitation and closure stages
CRC Press eBooks, Jun 28, 2023
Energies
The amount if oil shale resources throughout the world has been roughly estimated in accordance w... more The amount if oil shale resources throughout the world has been roughly estimated in accordance with various resource estimation methods. However, in some instances, detailed and comprehensive supporting methodologies for the estimation of commercial shale oil reserves have not been presented. The goal of this study is to develop a comprehensive method for the modified estimation of oil shale mineable reserves for shale oil projects. The methodology characterises oil shale according to its calorific value, oil content, conditional organic mass, and ash content by utilising a Monte Carlo simulation. Based on the results of the case study, the developed method proposes considering the relationships of the in situ oil shale grade and tonnage material (oil shale + limestone) to the oil retorting feed material grade and tonnage by taking into account the retorting plant oil recovery. For this purpose, a Monte Carlo stochastic modelling algorithm was developed. Based on the data analysis,...
The post mining processes impacts on the environment, economy and people, whilst there may be pos... more The post mining processes impacts on the environment, economy and people, whilst there may be positive contributions to the economy and social progress through mining there may also are negative impacts to the environment. The aim of this study is to elaborate sustainability assessment methodologies suitable for mine closure life cycle stage which allows defining hazardous influences on environment, society and economic dimensions, and helps quickly, conveniently and qualitatively solve, operate, find optimum variants for existing problems. The sustainability assessment methods will provides best decisions on the technological and post technological processes of a mining industry and can be used in the exploration, planning, exploitation and closure stages
The standard approach to open pit mine design typically applies a pit optimization process follow... more The standard approach to open pit mine design typically applies a pit optimization process followed by basic scheduling within the defined final pit limit. Often, as a result of this process, the mine operates at a higher strip ratio during the initial period and moves towards a lower strip ratio to the end of the mine life. The impact of this is an annual production schedule that does not follow a sequence that maximizes the net present value (NPV). The objective of this paper is to compare and contrast the standard and pushback approaches for open pit mining, with the aim of demonstrating that a pushback approach is practical and can increase the NPV of a project. The pushback method minimizes the stripping ratio in the early years and defers some of the equipment purchasing until later in the mine life. The results of the study show that the project NPV can be increased by the application of pushbacks by delaying and smoothing capital expenditure on equipment and waste stripping ...
Proceedings of the Estonian Academy of Sciences. Engineering, 2005
Proceedings of the 3rd World Congress on Mechanical, Chemical, and Material Engineering, Aug 1, 2022
Indoor Air, 2022
Our knowledge of the effects of exposure to indoor ultrafine particles (sub-100 nm, #/cm3 ) on hu... more Our knowledge of the effects of exposure to indoor ultrafine particles (sub-100 nm, #/cm3 ) on human brain activity is very limited. The effects of cooking ultrafine particles (UFP) on healthy adults were assessed using an electroencephalograph (EEGs) for brain response. Peak ultrafine particle concentrations were approximately 3 × 105 particle/cm3, and the average level was 1.64 × 105 particle/cm3 . The average particle number emission rate (S) and the average number decay rate (a+k) for chicken frying in brain experiments were calculated to be 2.82 × 1012 (SD = 1.83 × 1012 , R2 = 0.91, p = 0.0013) particles/min, 0.47 (SD = 0.30, R2 = 0.90, p < 0.0001) min-1 , respectively. EEGs were recorded before and during cooking (14 min) and 30 min after the cooking sessions. The brain fast-wave band (beta) decreased during exposure, similar to people with neurodegenerative diseases. It subsequently increased to its pre-exposure condition for 70% of the study participants after 30 min. The brain slow-wave band to fast-wave band ratio (theta/beta ratio) increased during and after exposure, similar to observed behavior in early-stage Alzheimer's disease (AD) patients. The brain then tended to return to its normal condition within 30 min following the exposure. This study suggests that chronically exposed people to high concentrations of cooking aerosol might progress toward AD.
The paper deals with the problems of aggregate testing and introduces first test results of all-i... more The paper deals with the problems of aggregate testing and introduces first test results of all-in aggregates. Also it is expected that testing method is applicable for waste materials in mining. Currently, nowadays there is not enough experience in experimental methods for defining conductivity and its setting limits, which could be used anywhere in Europe. Vertical conductivity test method may be any indirect method and its requirements may be placed by the benefit rules. From the current thesis topic test results may be used for research in other EU countries. Used standards for test equipment are valid throughout the EU.
Estonian Journal of Engineering, 2008
The processes of immediate roof exfoliation and pillars collapse is accompanied by significant su... more The processes of immediate roof exfoliation and pillars collapse is accompanied by significant subsidence of the ground surface. Ground surface subsidence causes soil erosion and flooding, swamp formation, agricultural damage, deforestation, changes in landscape, ground water level decreasing and the formation of unstable cavities. For the last four years a new blasting technology with great entry advance rates (EAR) has been introduced in an experimental mining block. By improved blasting technique the EAR reached 4 m; it is twice greater in comparison with usual technology, but emulsion explosive volume is twice higher and explosion occurs for 4.5 seconds (about 15 times longer than with the old technology). As a result of such greater advance rates, unsupported room lengths up to 5.5 m with decreasing stability of the immediate roof (IR) can be expected. In this paper the analysis of the IR stability using the deformation criteria for a new room-and-pillar mining technology with modern machinery at "Estonia" mine is presented. The analysis of the IR stability is based on the on-site underground testing by using benchmark stations and convergence measurements. The target of this study is to determine the impact of the vibration on the roof and pillars stability using the risk assessment method. Risk analysis on the basis of available earthquake data is also carried out.
Contents of abnormal oil in the Russian oil balance is constantly increasing. Transportation of a... more Contents of abnormal oil in the Russian oil balance is constantly increasing. Transportation of abnormal oil is very difficult process. This paper describes the possibility to change the rheological properties of the abnormal oil. This is a impact on oil by ultrasound with different power. Oil treated by ultrasound with changes in temperature and with the various dilutions addition. There are water, light hydrocarbons and chemical demulsifier. The research results are analyzed.