scholarly journals Equipment/machinery failure rate in hard coal mines

2019 ◽  
Vol 2 (1) ◽  
pp. 353-363
Author(s):  
Witold Biały
Keyword(s):  
Technological Process ◽  
Failure Rate ◽  
Underground Mining ◽  
Coal Mines ◽  
Technical Condition ◽  
Production Costs ◽  
Hard Coal ◽  
Main Task ◽  
Mining Equipment ◽  
Vibration Parameters

Abstract The main task of the maintenance services in hard coal mines is to ensure continuous operation of the equipment (machines). The measurable effect of these actions should be the reduction of maintenance costs of equipment (machinery) and thus the reduction of production costs – coal mining. The paper presents an issue of failure rate of technical measures applied in the mining process. In order to ensure greater efficiency and productivity, it is necessary to find the causes of the most frequent failures in this process and effectively counteract them. As a result of these activities, the production availability of machines/equipment involved in the mining process will increase. This will to a large extent ensure failure-free and uninterrupted progress, increase productivity and improve the quality of manufactured products, as well as reduce the operating costs of equipment (machines), and thus reduce production and product costs. This effect should consist mainly in the control of rational, safe and effective use and operation of equipment (machines) in the exploitation process. An algorithm implemented in one of the hard coal mines was presented. The technical condition of underground mining equipment was observed by periodical measurements of vibration parameters at selected points on the machine – measurements were conducted with a vibration pen. The aim of this research is to improve the reliability of technological process of a mining plant through its failure-free operation. In order to achieve this objective, i.e. the efficiency of a mining company, it is necessary to reduce its costs. The action that leads to this aim is a proper assessment of the technical condition with regard to the equipment used in technological process.

scholarly journals Mining Equipment Technical Condition Monitoring

2018 ◽  
Vol 41 ◽  
pp. 03020 ◽  
Author(s):  
Evgeny Kuzin ◽  
Vladimir Bakin ◽  
Dmitriy Dubinkin
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Condition Monitoring ◽  
Technical Condition ◽  
Process Equipment ◽  
Mining Equipment ◽  
The Earth ◽  
Vibration Parameters ◽  
Reducing Energy

The Earth, being the main object and operational basis for mining, is exposed to the greatest impact because of extracting minerals. Protection of elements of the biosphere, including subsoil, should provide for the provision of scientifically based and economically justified completeness and complexity of use. The article discusses the need to monitor the technical condition of mining equipment, as applied to assessing its technical condition and reducing energy consumption by this equipment. The dependence of energy consumption on vibration parameters and temperature of equipment surfaces is shown. The data of the results of vibration parameters monitoring are given. Criteria are given for estimating the energy efficiency of operation of process equipment and, accordingly, the influence of these parameters on the environment.

scholarly journals Enhancement of the Walbrzych Hard Coal Mines Geographic Information System for its application in studies of mining deformations

2018 ◽  
Vol 55 ◽  
pp. 00002 ◽  
Author(s):  
Jan Blachowski ◽  
Paulina Herkt
Keyword(s):  
Information System ◽  
Surface Deformation ◽  
Underground Mining ◽  
Coal Mines ◽  
Geographic Information ◽  
Hard Coal ◽  
Mining Sites ◽  
Mining Areas ◽  
Geospatial Analyses ◽  
Interactive Map

Geographic information systems (GIS) have been increasingly used in augmenting studies of mining and post-mining areas such as surface deformation analyses, risk assessment associated with old mining sites, identification of old mining sites and other. Up-to-date and complete geodatabase is an indispensable element of any geoinformation system facilitating such geospatial analyses. In this paper the process of verification and integration of Walbrzych Hard Coal Mines geodatabase and project of enhancing the Deformation Information System for these mines with web map application of underground workings and query tools developed with free and open source software (FOSS) have been described. The interactive map allows users to interact and obtain precise information on location and characteristics of underground mining and the query tools streamline pre-processing operations necessary for geospatial analyses.

scholarly journals Exposure to Harmful Dusts on Fully Powered Longwall Coal Mines in Poland

2018 ◽  
Vol 15 (9) ◽  
pp. 1846 ◽  
Author(s):  
Jarosław Brodny ◽  
Magdalena Tutak
Keyword(s):  
Underground Mining ◽  
Coal Dust ◽  
Coal Mines ◽  
Chronic Respiratory Disease ◽  
Working Environment ◽  
Hard Coal ◽  
Free Silica ◽  
Stone Dust ◽  
Hard Coal Mining

The mining production process is exposed to a series of different hazards. One of them is the accumulation of dust which can pose a serious threat to the life and health of mine workers. The analysis of dust hazard in hard coal mining should include two aspects. One is the risk of coal dust explosions, which poses a direct risk of injury or even loss of life, the second is the risk of harmful dust, associated with the possibility of negative health effects as a result of long-term exposure to dust in the worker’s body. The technologies currently applied in underground mining produce large amounts of coal and stone dust. Long-term exposure to dust and crystalline silica may cause chronic respiratory disease. The article presents the results of tests on the dust levels in the area of a fully-powered longwall. The tests were conducted for five longwalls from different hard coal mines. In each of them, the average values of inhalable and respirable dust as well as the percentage content of free silica in the dust were determined in ten selected working positions. Additionally, for the longwall with the highest dust concentration, the levels of dust were determined for the basic activities related to the phases of the technological cycle. The comparative analysis conducted and the results obtained demonstrate large variations in the dust levels in the different areas. The permissible values were significantly exceeded in a number of cases. This poses a great threat to the health of Polish miners. The results obtained indicate that it is necessary to undertake more effective measures in order to improve the working environment of the crew in hard coal mines.

scholarly journals Computer Systems Supporting the Management of Machines/Equipment in Hard Coal Mines. Case Study

2019 ◽  
Vol 27 (3) ◽  
pp. 138-143
Author(s):  
Witold Biały ◽  
Jiri Fries
Keyword(s):  
Computer Systems ◽  
Coal Mines ◽  
Spare Parts ◽  
Economic Effects ◽  
Production Costs ◽  
Hard Coal ◽  
Operation And Maintenance ◽  
High Production ◽  
Effective Use

AbstractComputer systems supporting the management of machines operation and maintenance in companies have been successfully applied in many branches of industry. Over the last few years these systems have been considerably transformed. It also seems that using them for operating mining machines in hard coal mines is inevitable, as maintenance generates high production costs. If implemented, the systems will allow for optimization of stocks, spare parts and materials, supplies, outsourced services as well as maintenance-repair works. Application of a system supporting the management of mining machines/equipment will also enable a better, more effective use of employees. As a result of these actions, the time needed for preparations and repair will be shortened, which will translate directly into the economic effects of mines.

scholarly journals Power generating units for a powered roof support complex

2020 ◽  
Vol 174 ◽  
pp. 03008
Author(s):  
Dawid Szurgacz ◽  
Krzysztof Kos ◽  
Patryk Szolc ◽  
Tatiana Gvozdkova
Keyword(s):  
Industry 4.0 ◽  
Underground Mining ◽  
Hard Coal ◽  
Main Task ◽  
Pumping Station ◽  
Design And Implementation ◽  
Operation Process ◽  
Working Medium ◽  
Mining Plant ◽  
Roof Support

The degree of utilisation of machinery and equipment is an important factor influencing the volume of daily output of an underground hard coal mine. Consequently, it also affects the efficiency and economic performance of an underground mining plant. The main task of a new pumping station is to ensure safety and continuity of the operation process in both active and new longwalls in the future. The article presents a modern and innovative pumping station that meets the assumptions of Industry 4.0. The power units supplying a longwall complex included in the central pumping station were selected so as to minimise the number of failures. The interruptions in the technological process of coal mining related to the lack or insufficient pressure of the working medium in the supply bus of the powered roof support are caused by inadequate type of hydraulic pumps. The paper presents a developed concept of an innovative central hydraulic pumping station feeding a longwall complex based on a powered roof support. The presented implementation—starting from the concept through design and implementation—has contributed to the improvement of working conditions and safety.

Whole-Body Vibration Exposures in Undeground Coal Mining Operations

2016 ◽  
Vol 60 (1) ◽  
pp. 914-918
Author(s):  
D. Lynas ◽  
R. Burgess-Limerick
Keyword(s):  
Coal Mining ◽  
Underground Mining ◽  
Coal Mines ◽  
Whole Body Vibration ◽  
Electrical Equipment ◽  
Whole Body ◽  
Mining Equipment ◽  
Mining Operations ◽  
Body Vibration ◽  
Underground Coal Mines

Studies conducted on surface coal mining equipment have identified whole-body vibration as a significant hazard. Operators of underground mobile equipment, particularly shuttle cars and transport vehicles, are likely to be exposed to significant levels of whole-body vibration. To date, measuring whole-body vibration from underground mining mobile equipment has been difficult due to the strict guidelines governing the use of electrical equipment in underground mines. This paper presents data obtained from two low-methane coal mines using an iOS application installed on iPod Touch devices. The majority of measurements taken from a range of mobile plant and equipment in use at the underground coal mines exceeded the ISO2631.1 Health Guidance Caution Zone. Further investigations are being undertaken to develop a thorough understanding of whole-body vibration exposures to which operators of mobile equipment used in underground coal mines are exposed and the opportunities for application of this information to assist mine site safety, health and risk management processes.

scholarly journals Forecasting Methane Emissions from Hard Coal Mines Including the Methane Drainage Process

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3840 ◽  
Author(s):  
Magdalena Tutak ◽  
Jarosław Brodny
Keyword(s):  
Neural Networks ◽  
Greenhouse Gas ◽  
Natural Environment ◽  
Underground Mining ◽  
Coal Mines ◽  
Energy Resource ◽  
High Energy ◽  
Methane Emissions ◽  
Hard Coal ◽  
Methane Drainage

With regard to underground mining, methane is a gas that, on the one hand, poses a threat to the exploitation process and, on the other hand, creates an opportunity for economic development. As a result of coal exploitation, large amounts of coal enter the natural environment mainly through ventilation systems. Since methane is a greenhouse gas, its emission has a significant impact on global warming. Nevertheless, methane is also a high-energy gas that can be utilized as a very valuable energy resource. These different properties of methane prompted an analysis of both the current and the future states of methane emissions from coal seams, taking into account the possibilities of its use. For this reason, the following article presents the results of the study of methane emissions from Polish hard coal mines between 1993–2018 and their forecast until 2025. In order to predict methane emissions, research methodology was developed based on artificial neural networks and selected statistical methods. The multi-layer perceptron (MLP) network was used to make a prognostic model. The aim of the study was to develop a method to predict methane emissions and determine trends in terms of the amount of methane that may enter the natural environment in the coming years and the amount that can be used as a result of the methane drainage process. The methodology developed with the use of neural networks, the conducted research, and the findings constitute a new approach in the scope of both analysis and prediction of methane emissions from hard coal mines. The results obtained confirm that this methodology works well in mining practice and can also be successfully used in other industries to forecast greenhouse gas and other substance emissions.

scholarly journals An Exploratory Economic Analysis of Underground Pumped-Storage Hydro Power Plants in Abandoned Deep Coal Mines

Energies ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5634
Author(s):  
Reinhard Madlener ◽  
Jan Martin Specht
Keyword(s):  
Power Plants ◽  
Underground Mining ◽  
Coal Mines ◽  
Energy Transition ◽  
Economic Feasibility ◽  
Hard Coal ◽  
Mountainous Area ◽  
Hydro Power ◽  
Hydro Power Plants ◽  
Pumped Storage

This study researches the concept of underground pumped-storage hydro power plants in closed-down underground hard coal mines in Germany. After a review on how this could be realized technically, an economic feasibility analysis is presented, with a particular focus on the costs for the underground storage reservoir. The analysis is performed for different lower (i.e., underground) reservoir sizes and temporal arbitrage potentials (peak/off-peak electricity price spreads), and cost uncertainty is dealt with by means of a Monte Carlo simulation for two distinct head heights. The findings regarding costs and acceptability are compared with those of a classic (on-surface) pumped-storage hydro power plant in a mountainous area. Based on a techno-economic evaluation we conclude that under favorable conditions the realization of underground pumped-storage hydro power (UPSHP) plants seems both technically feasible and economically reasonable. More specifically, an extension of a tubular system seems the most promising option. A UPSHP plant in a mineshaft is probably slightly more expensive than a conventional one, an outcome that depends strongly on the feasible head height. However, the significant reduction of the adverse impacts on the landscape and on local residents, as well as a potentially large number of feasible sites in flat terrain, could make UPSHPs an interesting option for the future energy transition, not just in Germany but worldwide at sites where underground mining is being abandoned.

scholarly journals The concept of hard coal mine in the perspective of Industry 4.0

2019 ◽  
Vol 2 (1) ◽  
pp. 327-335
Author(s):  
Dorota Palka ◽  
Tamer Rizaoğlu
Keyword(s):  
Industry 4.0 ◽  
Process Management ◽  
Industrial Revolution ◽  
Underground Mining ◽  
Technical Condition ◽  
Raw Material ◽  
Underground Mines ◽  
Hard Coal ◽  
Effective Work ◽  
Polish Economy

Abstract For the Polish economy, hard coal is the basic raw material for the production of electricity and heat, guaranteeing energy security. To ensure safe and effective work in underground mines, the most modern technical solutions are implemented. Innovative achievements of production automation are increasingly being used. Introduction of the Industry 4.0 concept elements is an opportunity for: improvement of coal exploitation processes, use of IT tools supporting decision-making processes and ensuring real-time process management. However, the specificity of the mining environment poses many barriers, for example limitations resulting from geology, extent and volume of excavations, device mobility and telecommunications. The article describes mining threats and limitations as well as the current technical condition of Polish mining. The latest trends in mining development are described in line with the ideas of the fourth industrial revolution. The main goal of the article is to analyze the feasibility of implementing Industry 4.0 concept solutions for underground mining. The analysis was performed with a tabular descriptive method, based on the conducted mining documentation, own observations, surveys and literature research. The indicated limitations and recommendations developed can serve as a guide to further scientific research and implementations in this area.

scholarly journals Concept of the exhaust system of combustion engines used in underground mining

2017 ◽  
Vol 169 (2) ◽  
pp. 97-100
Author(s):  
Krzysztof LESIAK ◽  
Marek BRZEZANSKI
Keyword(s):  
Internal Combustion Engines ◽  
Underground Mining ◽  
Coal Mines ◽  
Exhaust System ◽  
Internal Combustion ◽  
Design Concept ◽  
Hard Coal ◽  
Combustion Engines ◽  
Design Solutions ◽  
Exhaust Systems

Analyses the problems occurring in the exploitation combustion engines used in mining have been presented in article. Design solutions used at present to protect the intake and exhaust systems of internal combustion engines operated in underground hard coal mines have been also described. A new design concept of exhaust system have been presented.

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