Coal Industry Research Articles

Pilot-scale evaluation of the sustainability of membrane desalination systems for the concentrate volume minimization of coal chemical wastewater

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Comprehensive Evaluation of Coal Mine Production Safety Based on Fuzzy Comprehensive Evaluation

In view of the potential safety hazards existing in the production and operation process of coal mining enterprises, through expert consultation and comprehensive investigation, sort out the relevant risk factors, establish the corresponding coal mine production risk evaluation index system, conduct fuzzy comprehensive evaluation by combining AHP and fuzzy mathematical evaluation method, and calculate the weight of each index and the risk level of coal mine production, Finally, through a case study of a coal mine in Inner Mongolia Autonomous Region, the feasibility of the risk evaluation method is verified, which provides a theoretical basis for coal mine production enterprises to formulate risk management schemes and a reference for risk management of coal mine production industry.

The application of artificial neural network model to predicting the acid mine drainage from long-term lab scale kinetic test

Acid mine drainage (AMD) is one of the common environmental problems in the coal mining industry that was formed by the oxidation of sulfide minerals in the overburden or waste rock. The prediction of acid generation through AMD is important to do in overburden management and planning the post-mining land use. One of the methods used to predict AMD is a lab-scale kinetic test to determine the rate of acid formation over time using representative samples in the field. However, this test requires a long-time procedure and large amount of chemical reagents lead to inefficient cost. On the other hand, there is potential for machine learning to learn the pattern behind the lab-scale kinetic test data. This study describes an approach to use artificial neural network (ANN) modeling to predict the result from lab-scale kinetic tests. Various ANN model is used based on 83 weeks experiments of lab-scale kinetic tests with 100% potential acid-forming rock. The model approaches the monitoring of pH, ORP, conductivity, TDS, sulfate, and heavy metals (Fe and Mn). The overall Nash-Sutcliffe Efficiency (NSE) obtained in this study was 0.99 on training and validation data, indicating a strong correlation and accurate prediction compared to the actual lab-scale kinetic tests data. This show the ANN ability to learn patterns, trends, and seasonality from past data for accurate forecasting, thereby highlighting its significant contribution to solving AMD problems. This research is also expected to establish the foundation for a new approach to predict AMD, with time efficient, accurate, and cost-effectiveness in future applications.

Перспективы развития проектов угледобывающей промышленности Арктической зоны Российской Федерации

The article emphasizes that the development of projects in the coal mining industry is difficult, and first of all,due to rising prices for coal insurance in transit, increasing commercial costs, and logistics imperfections. Russian coal producers strive to increase the quality of finished products and their most efficient marketing. This behavioral attitude to the extraction, processing and enrichment of coal predetermined the position of the organizers of productionas an increase in competitive advantages with a comprehensive upgrade of the material and technical base.Taking into account the specifics of the oligopolistic market that ensures the sale and sale of coal, the proposed coefficients of the economic potential of coal mining organizations consider revising as standards in further research and in practice. The use of the studied coefficients is economically justified, since not all coal enterprises strivefor a comprehensive assessment due to differences in the assessment of energy efficiency, innovation activity, solvency and asset turnover.

Особенности психологической безопасности личности сотрудников промышленных предприятий с различным уровнем осмысленности жизни

The article is concerned with the problem of psychological safety of personality with respect to a sense-making function in the context of professional activities. The study has provided further view on the phenomenon of psychological safety of personality in the framework of a meaningful context (specificity of a level of life meaningfulness). The rationale for the idea to consider “meaningful content” to be a structural component of psychological safety of personality has been provided. The author identified the parameters of psychological safety of personality when doing a comparative analysis of interpersonal criteria for developing meaningful spheres of coal industry workers. A complex analysis of personality traits of coal industry workers has been supplied, which are of great significance for the assessment of productive activities and accurate forecasting. A psychosocial aspect of safety needs to be taken into account when arranging and managing a production process.

OVERCOMING THE DISADVANTAGES OF THE COAL INDUSTRY AS A SCIENTIFIC APPROACH TO GREENING CARBON ENERGY

ABSTRACT. The problem of stopping carbon dioxide emissions from carbon energy can be solved either by ceasing coal mining or by overcoming the shortcomings of the coal industry. The main disadvantage of carbon energy is the emission of carbon dioxide from coal combustion. Carbon dioxide is also formed due to the endogenous oxidation of coal during its transportation. Eliminating carbon dioxide emissions from coal combustion can be achieved by forming an underground bifunctional mining and energy system containing except a steam generator with a steam turbine also several types of magnetohydrodinamic generators running by oxygen produced by algae on the earth's surface that eat carbon dioxide from the exhausted gases from coal combustion. Liquidation of endogenous oxidation of coal can be achieved by replacing wheeled transport with a new type of pipeline transport, using a carrier medium with superior density.

Impacts of geopolitical risk on China stock market: A dynamic resilience analysis

This study investigates the resilience of various industries in China stock market against geopolitical risk (GPR). Using TVP-VAR-SV analysis, time-varying effects of GPR on China stock market is first measured and based on the results, absorption intensity and absorption duration are constructed as indicators for assessing industries’ resilience. Empirical results show that: (1) the impact of GPR on industries in China stock market is time-varying and is more significant in the short and medium run than in the long run. (2) GPR on all the industries turns from positive to negative in both short and medium run, except for coal industry. (3) The absorption intensity and absorption duration of the selected industries show opposite trends, which indicates that these industries can adapt and absorb the larger GPR shocks, while the smaller GPR shocks require more time to be digested. (4) Both absorption intensity and duration show trend mutation when facing with major GPR events. Our findings provide crucial insights to investors and policymakers in China stock markets.

Міжлабораторні порівняльні випробування як спосіб оцінки технічної компетентності вимірювальних лабораторій

The article substantiates the necessity of participation of measuring laboratories of coke and coal industry enterprises in interlaboratory comparative tests. It is shown that the decisive factor in the accreditation or certification of testing laboratories is the reliability of the results. Thus, the regulatory documents governing the general requirements for the competence of laboratories specify a number of measures to ensure the quality of the results obtained. Among them, participation in inter-laboratory comparative tests (ILCT) is recognised as the most objective way to verify the reliability of the results obtained in a laboratory. The article defines the ILCT and explains the responsibilities of organisations entitled to conduct them. The data on the experience of the Testing Centre ‘Khartsis’ of SE ‘UKHIN’, approved by the NATIONAL ACCREDITATION AGENCY OF UKRAINE as a provider of verification of the professional level of laboratories in the field of testing lignite, hard coal, anthracite, products of their processing and blast furnace coke, foundry coke, coal coke, coke nuts, coke fines, are presented. In particular, the article analyses the results of four rounds of the Interlaboratory Comparison Programme for the Measurement of Coal and Coke Quality Indicators, implemented by the SE ‘UKHIN’ in 2023, in which measuring laboratories of coke and chemical enterprises, concentrating plants, mines, thermal power plants and other enterprises of various forms of ownership and departmental subordination participated. Using the example of actual results obtained, it is shown that constant participation in the Programme is an effective means of controlling the quality and reliability of the results issued by the laboratory, as it allows timely identification and elimination of the causes of poor quality measurements. Keywords: coal, coke, quality indicators, measuring laboratory, comparative interlaboratory tests, Programme, provider, control sample, round, certification, accreditation. Corresponding author: O.B. Sosnova, e- mail: lenas61.61@gmail.com

Characterization of coal extracts and their performances as binder for new carbon-based structural units

Coal production and usage have been declining in the past decade due to the transition to renewable energies, environmental regulations to reduce environmental pollution due to direct coal combustion from coal-fired power stations, and administrative policies. This downturn has created tremendous challenges for the coal industry, and many states rely on revenue from coal mining. Developing new valorization routes with high coal demand is essential and using coal-derived materials to make engineered products does offer an eco-friendly, attractive, and value-added use. This paper presents a brief introduction to the extraction process to derive coal deposits, extracts, and residuals (CDERs) and a comprehensive characterization analysis to determine the suitability of CDERs as binders to produce an innovative construction material named the carbon-based structural unit (CSU). CDERs are used to prepare the CSU with or without using mesophase pitch (MP) as binders and selected CDERs are heat-treated and pressure-heat-treated to improve their binding capabilities. The performances of the CSU specimens are evaluated based on compressive strength, density, and thermal conductivity. The CSU specimens mixed with distilled residue (DR) to pyrolysis char (PC) ratio of 1:2 achieve a compressive strength of 54.85MPa, which is higher than the compressive strength of 30MPa of normal concrete. The CSU specimens with deposit (De) and tetralin insoluble (TI) require the addition of MP to obtain compressive strengths greater than 30MPa. These CSU specimens possess a relatively low density of about 1g/cm3 and low thermal conductivity of less than 0.25W/m.K.

Land, Labor, and the Railroad in Industrial Appalachia: How the Baltimore and Ohio Railroad Engineered Space, 1843-1872

During the nineteenth century, the Baltimore and Ohio railroad reshaped the social, political, and physical environment of the mid-Atlantic around the needs of the industrial economy. The creation of industrial space, and the proliferation of communities to populate it, is seen retrospectively as an inevitable consequence of technological innovation, but engaging with contemporary corporate records reveals that this space, like the railroad, was engineered. In order to design a supply chain that would make industrialization economical, the railroad and coal industries engaged in political and social engineering to design the new locales of industrialism, exemplified in the Allegheny Mountains by the coal company town. As this new type of space was populated by the workers necessary to its function, the spatial practices of those workers and their families informed its evolution, defining its boundaries and informing the ways in which it transcended them. Using an environment as methodology, this paper explores the early history of American industrialism, the spatial inflection of corporate power, and the role of working class contestations in the construction of the built environment.

Memories of Black Gold: Populist Narratives of Memory Politics Justifying the Polish Coal Industry

Memories of Black Gold: Populist Narratives of Memory Politics Justifying the Polish Coal Industry

Design and optimization of intelligent ventilation system in coal mine

With the continuous development of the coal industry, coal mine safety and environmental protection have gradually become the focus of important attention. The design and optimization of mine ventilation systems is a key factor in ensuring air quality and safety in the working area. In order to improve the application level of automation and intelligent equipment of mine ventilation system, under the existing conditions of mine, the design significance and goal of mine intelligent ventilation system are taken as the starting point, and the design and application effects are analyzed. By optimizing the layout of ventilation routes, increasing the number of sensors, building an intelligent ventilation system, optimizing the ventilation scheme in the main production scenarios such as coal face, driving face and opening up main roadway in the daily production process of the mine, realizing rapid wind regulation and wind counteraction when disasters occur, and using air flow short circuit to form protective measures, effectively avoiding the expansion of disasters and accidents. At the same time, remote automatic control of ventilation facilities and equipment is carried out to effectively improve the optimal utilization of air supply, avoid the phenomenon of insufficient air supply and waste of air volume, and improve the intelligent level of mine ventilation system.

Розвиток ресурсозберігаючих технологій металургійного виробництва на основі українського вугілля

The article shows that the post-war restoration of Ukraine's ferrous metallurgy should be based on a new technical and environmental basis - the so-called ‘green metallurgy’ aimed at reducing the harmful environmental impact of iron and iron-based alloys. One of the main elements of the development of ‘green metallurgy’ is the replacement of traditional blast furnace production with the reduction of iron ore with coke with the technology of direct reduction of iron without the use of coke. It is noted that the most promising for the conditions of Ukraine is the process of direct reduction of iron with synthesis gas, which is obtained during the gasification of low-metamorphosed coal. Ukraine has all the necessary prerequisites for the development of low-carbon metallurgy, namely: large deposits of iron ore and its enrichment facilities, which ensure the production of semi-finished products (pellets) of proper quality; the presence of about two-thirds of fossil coal reserves in Ukraine in the balance sheet of lowmetamorphosed coal grades B, D, DG and G. It is emphasised that the destruction of most coal-fired power generation facilities has led to a surplus of coal mined in Ukraine, which is quite suitable for gasification and synthesis gas production. Therefore, the development of metallurgy based on the use of synthesis gas from low-metamorphosed coal makes it possible not only to provide the country's economy with high-quality steel, but also to preserve the coal industry and, moreover, to provide it with new opportunities by ensuring sustainable sales at affordable prices. It has been shown that in practic carbon neutrality of the technology of iron recovery from ores can be achieved by using pure hydrogen as a reducing agent with the possible use of carbon fuels only to provide heat for the reduction reactions. Therefore, in order to reduce the environmental impact of the proposed iron production technology, it is necessary to find new ways to produce hydrogen. Keywords: ‘green’ metallurgy, coke-free metallurgy, direct reduction of iron, low-metamorphosed coal, coal gasification, hydrogen production. Corresponding author I.V. Shulga, e-mail: ko@ukhin.org.ua

ТЕМАТИЧЕСКИЙ СУВЕНИР КАК МУЗЕЙНЫЙ ПРЕДМЕТ И СРЕДСТВО РЕПРЕЗЕНТАЦИИ ИСТОРИИ ГОРНОЙ НАУКИ В ЭКСПОЗИЦИОННО-ВЫСТАВОЧНОМ КОМПЛЕКСЕ ИНСТИТУТА УГЛЯ

Modern socio-economic and political transformations have an impact on sociocultural processes,including the actualization of cultural values, traditions and social experience of professional communities. Kemerovo Oblast – Kuzbass is historically identified as a mining region. The professional community of miners finds various forms of fulfilling the needs of their cultural representation, in particular through the creation of souvenirs. The experience of the Institute of Coal shows that the thematic collection of souvenirs in the museum interpretation is a means of documenting the history of mining science, self-identification of coal scientists and updating the scientific component of the heritage of the coal industry.

Present situation of comprehensive utilization of coal-based solid waste

At present, the annual discharge of coal-based solid waste in China has exceeded 800 million tons, but the mainstream treatment methods are still simple treatment methods such as goaf backfilling and openpit stacking. The massive stacking of coal-based solid waste is not only a serious waste of resources itself, but also brings a series of problems such as environmental pollution. Under the “Carbon Peak” and “Carbon Neutrality” strategy in China, in order to achieve green and rapid development of the coal industry, it is necessary to solve the problem of coal-based solid waste treatment and achieve green and comprehensive utilization of coal-based solid waste. Taking coal gangue, gasification slag and fly ash as representative coal-based solid waste, the present situation of coal-based solid waste production in China and the basic properties of coal-based solid waste are introduced. The utilization status and application characteristics of coal-based solid waste in cement concrete, roadbed materials, soil improvement and so on are focused on, and the resource utilization potential of coal-based solid waste is analyzed and summarized. Then the application prospect of coal-based solid waste in high-value utilization in the future is analyzed and prospected.

Surrounding Rock Control Technology of Strong Dynamic Pressure Roadway in Hudi Coal Industry

Surrounding Rock Control Technology of Strong Dynamic Pressure Roadway in Hudi Coal Industry

Land, Labor, and the Railroad in Industrial Appalachia: How the Baltimore and Ohio Railroad Engineered Space, 1843-1872

During the nineteenth century, the Baltimore and Ohio railroad reshaped the social, political, and physical environment of the mid-Atlantic around the needs of the industrial economy. The creation of industrial space, and the proliferation of communities to populate it, is seen retrospectively as an inevitable consequence of technological innovation, but engaging with contemporary corporate records reveals that this space, like the railroad, was engineered. In order to design a supply chain that would make industrialization economical, the railroad and coal industries engaged in political and social engineering to design the new locales of industrialism, exemplified in the Allegheny Mountains by the coal company town. As this new type of space was populated by the workers necessary to its function, the spatial practices of those workers and their families informed its evolution, defining its boundaries and informing the ways in which it transcended them. Using an environment as methodology, this paper explores the early history of American industrialism, the spatial inflection of corporate power, and the role of working class contestations in the construction of the built environment.

Перспективы угольной генерации

The article provides overview information on the state and problems of coal generation in Russia and the world. The main problem of coal energy is the environmental safety of the industry. Tightening environmental requirements for air purity from pollutants emitted by coal-fired thermal power plants has led to many countries beginning to abandon coal-fired generation in favor of alternative energy sources. The volume of investments in coal industry projects began to decline, and in a number of countries they planned to completely abandon it in the medium term. The prospect for the development of coal generation in Russia and the world is one of the most pressing topics for discussion, which has been repeatedly discussed on various information platforms, including in the international context. Experts from many countries in Russia and the world regularly present their researches on the importance of coal generation, coal reserves and energy consumption of coal fuel, and the environmental safety of the industry. The object of the study is the problems of coal generation in Russia and the world. The purpose of the work is to analyze and quantify the distribution of coal power generation capacity, assess the environmental problems associated with coal generation. The objective of the research is to obtain reliable information to assess the quantitative characteristics of energy consumption and environmental safety of the industry. The methods in the study consisted in analyzing information data from analytical agencies and publicly available materials. The results of analytical studies presented in the article indicate that in the near future, thermal energy will remain predominant in the energy balance of individual countries of the world. However, solving problems of environmental safety of fuel energy requires a centralized approach, significant financial investments and the creation of an appropriate regulatory framework.

The impact of final demand on energy sectors' interregional output

This study investigates the influence of aggregate demand on the interregional energy sector in Indonesia, aiming to ascertain whether the proximity of regions impacts the demand within the energy sector. Utilizing data from the Input-Output Indonesia Interregional Table, this research encompasses six regions: Sumatra, Java, Bali & Nusa Tenggara, Kalimantan, Sulawesi, and Maluku & Papua. The energy sectors analyzed include oil, gas & geothermal mining, coal & lignite mining, coal industry & oil, gas refinery, and electricity and gas procurement & ice production. Findings indicate that the electricity sector exhibits relatively high sensitivity and dispersion power indices, whereas the gas procurement & ice production sectors display low sensitivity and dispersion power indices. Exports are identified as the primary contributors to the Oil, Gas, & Geothermal Mining and Coal & Lignite Mining sectors. Conversely, household consumption has the most significant impact on the other sectors. Crucially, the study reveals that the effect of a region's final demand on the output of another region is not directly correlated with geographical proximity. This insight leads to the recommendation that energy supply procurement policies should consider other regions' demands and economic developments, particularly those substantially influencing output enhancement.

CFD Simulation of Methanol Dehydration Step through an Adiabatic Fixed-bed Reactor of DME Synthesis

Today, dimethyl ether (DME) is changing to ordinarily worn as a superb aerosol propellant and refrigerant for its eco-friendly characteristics. Lately, with the development of novel chemical energy in the coal industries, it has become a fascinating field of research as an alternative green fuel for diesel machines due to the high cetane number. The DME synthesis processes include catalytic dehydrating methanol in an adiabatic fixed-bed reactor. In this study, to investigate the chemical conditions of the methanol dehydration reaction, CFD simulations of the adiabatic reactor have been assessed. The advantage of the work is a sensitivity analysis was run to find the effect of pressure, kinetics, and velocity on the reactor performance. The results showed that using a γ-Al2O3 catalyst with selective mechanical properties and unique surface properties is a convenient choice for DME synthesis. The CFD simulation results also show that the laboratory data such as pressure, energy, and velocity in the adiabatic reactor meet the reaction requirements well, and deliberated a major vision of what happened in the reactor. Also, the graphs of the temperature profile with changes in physical properties pomp that methanol dehydration reaction strongly depends on environmental factors and gives different results under the influence of other conditions.