scholarly journals The impact of deep underground coal mining on Earth fissure occurrence

2016 ◽  
pp. 321-330 ◽  
Author(s):  
Agnieszka A. Malinowska
Keyword(s):  
Coal Mining ◽  
Underground Coal Mining ◽  
Earth Fissure ◽  
Deep Underground ◽  
The Impact

scholarly journals Determining the working status of the production organization structure in the mechanized longwall when the negative impact factor has appeared

2020 ◽  
Vol 61 (6) ◽  
pp. 14-21
Author(s):  
Hung Phi Nguyen ◽  
Keyword(s):  
Coal Mining ◽  
Negative Impact ◽  
Mining Industry ◽  
Underground Coal Mining ◽  
Strategic Development ◽  
Potential Factors ◽  
Production Organization ◽  
Mineral Industries ◽  
The Impact

For the purpose of ensuring sustainable development, one of the important factors is to increase labor productivity and minimize the number of workers directly working in the mine. In the context of increasing requirements for underground coal mining, the number of workers tends to decline due to shifting to other types of economy. Therefore, the mechanization investment in coal mining is the inevitable destination, which guarantees the long - term strategic development of the coal mining industry. Although the mechanized mining has obtained several achievements, the annual coal mining output is still not high, specifically reaching 73.8%; 51.3%; 61.4% according to the plan respectively for the years of 2013, 2014 and 2015. A total of mechanized lines has been invested and applied in Vietnam National Coal - Mineral Industries Holding Corporation Limited, but there are only six lines in operation until at this time. For five recent years, when the mining industry has accumulated a lot of experience in using mechanization technology, it is found that the potential factors causing production interruption have resulted in the effectiveness of these longwalls not achieved as expected. Summary of advantages, difficulties, and unsuccessful implementation of mechanization technology in the condition of Quang Ninh mine area has shown a big gap in production organization that should be specifically studying. In this study, the author wants to build a basic background in determining the impact of potential factors conscious of the longwall mechanized.

scholarly journals Analysis of removal method of a 19th church‘s deflection

2019 ◽  
Vol 284 ◽  
pp. 05005 ◽  
Author(s):  
Krzysztof Gromysz
Keyword(s):  
Coal Mining ◽  
Mining Area ◽  
Underground Coal Mining ◽  
Model Calculations ◽  
Building Model ◽  
The Past ◽  
Church Building ◽  
The Stability ◽  
The Impact ◽  
The Church

A historic mid-19th C. church building is located on the area affected by the impact of underground coal mining. In the past, the building was secured many times against an adverse effect of the mining area deformation by providing massive reinforced-concrete reinforcements. As uneven depressions have emerged, caused by underground coal mining, the structure has become vertically deflected by 39 mm/m in the eastern direction. With the building length of 51 m, the corners have been vertically displaced in relation to each other by 1.99 m. The existing deflection impedes the structure‘s usage, decreases its value and threatens the stability of its furnishings. The deflection should therefore be removed. Due to the building‘s historic character and the presence of massive reinforcements installed already during its operation, three scenarios of deflection rectification were assessed. After the assessment, a scenario was chosen where the building is detached with the use of hydraulic jacks in the floor level, and then straightened by uneven raising. The lifting height of the corners is up to 1.99 m. The article presents the results of the building model calculations and the reinforcements proposed for the time of straightening. It was assumed that the structure, with the total weight of 810,000 tonnes, will be straightened by means of 178 jacks. The outlined procedure will restore the building‘s architectural assets and value and will allow the church goers to use the church comfortably.

Working conditions and occupational pathology of coal miners in the Arctic

2019 ◽  
pp. 452-457 ◽  
Author(s):  
S. A. Gorbanev ◽  
S. A. Syurin ◽  
N. M. Frolova
Keyword(s):  
Coal Mining ◽  
Working Conditions ◽  
Occupational Diseases ◽  
Climatic Factors ◽  
Coal Mines ◽  
The Arctic ◽  
Morbidity Rate ◽  
Coal Miners ◽  
Increased Risk ◽  
The Impact

Introduction. Due to the impact of adverse working conditions and climate, workers in coal-mining enterprises in the Arctic are at increased risk of occupational diseases (OD).The aim of the study was to study the working conditions, causes, structure and prevalence of occupational diseases in miners of coal mines in the Arctic.Materials and methods. Th e data of social and hygienic monitoring “Working conditions and occupational morbidity” of the population of Vorkuta and Chukotka Autonomous District in 2007–2017 are studied.Results. It was established that in 2007–2017 years, 2,296 ODs were diagnosed for the first time in 1851 coal mines, mainly in the drifters, clearing face miners, repairmen and machinists of mining excavating machines. Most often, the ODs occurred when exposed to the severity of labor, fibrogenic aerosols and hand-arm vibration. The development of professional pathology in 98% of cases was due to design flaws of machines and mechanisms, as well as imperfections of workplaces and technological processes. Diseases of the musculoskeletal system (36.2%), respiratory organs (28.9%) and nervous system (22.5%) prevailed in the structure of professional pathology of miners of coal mines. Among the three most common nosological forms of OD were radiculopathy (32.1%), chronic bronchitis (27.7%) and mono-polyneuropathy (15.4%). In 2017, coal miners in the Arctic had a professional morbidity rate of 2.82 times higher than the national rates for coal mining.Conclusions. To preserve the health of miners of coal mining enterprises, technical measures to improve working conditions and medical interventions aimed at increasing the body’s resistance to the effects of harmful production and climatic factors are necessary.

AGENT'S REPUTATION, ACCOUNTING AND COSTING IN ORGANISATIONAL CONTROL STRUCTURES

1997 ◽  
Vol 24 (1) ◽  
pp. 1-23 ◽  
Author(s):  
Tom McLean
Keyword(s):  
Coal Mining ◽  
Industrial Revolution ◽  
Control Structures ◽  
The Impact

This paper examines the roles of accounting and costing in the management of coal mining during the Industrial Revolution in Britain, and considers the impact of the agent's reputation in the development and use of these systems.

Occupational injuries in underground coal mining in Serbia: A case study

Work ◽  
2021 ◽  
pp. 1-11
Author(s):  
Ivana Ilić Krstić ◽  
Danijela Avramović ◽  
Snežana Živković
Keyword(s):  
Coal Mining ◽  
Occupational Safety ◽  
Preventive Measures ◽  
Occupational Injuries ◽  
Underground Coal Mining ◽  
Health Records ◽  
Employee Safety ◽  
Injury Data ◽  
Safety And Health

BACKGROUND: Mining, especially underground coal mining, has always been a hazardous occupation. Injuries, including those that are fatal, are a major occupational risk that all miners have to face. OBJECTIVE: Despite the fact that all workers are aware of the risks, efforts must be made to increase their safety through the implementation of preventive measures. METHODS: This retrospective study includes injury data from all nine Serbian coal mines over a 16-year period, from 2000 to 2016. All injury data were collected from employee safety and health records. RESULTS: In the analyzed period, a total of 9,273 occupational injuries were recorded at Resavica. The highest number of occupational injuries (over 600) were recorded in 2008 (669), 2004 (651), and 2005 (603). The data shows that almost one fifth of the total number of occupational injuries, or 20.74%, occurred during the said three years. On average, 493.06 minor, 51.12 severe, and 1.29 fatal injuries occurred each year. Every day there were 1.29 minor occupational injuries and every seven days there was one severe injury. CONCLUSIONS: Despite indications that there is a connection between some of the variables and the number of injuries, the general conclusion is that injuries are accidental and unpredictable. The high percentages of injuries are due to the organization of work and the age or qualification structure of the staff and, of course, are the consequence of likelihood –the greater the number of workers, the greater the likelihood of injury. However, the present study showed that some measures can be taken to increase occupational safety and reduce the number of injuries.

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