• Journal of Preventive Medicine and Public Health
• /
• 제22권2호
• /
• pp.197-207
• /
• 1989

This study was planned to investigate employer's attitude about health management of workers in coal mine industry. The sample size was 38.3% (178 coal mine industries) of total 463 coal mine industries. The mailing survey was used to collecting data of coal mine industry and manager of coal mine industry. Distribution of attitude about health management of workers in coal mine industry, specifically necessity and availability of some items of health management and some apparatus of working environment, was skewed to positive attitude. While recognition of susceptability of coal workers' pneumoconiosis was low, that of seriousness of incidence of coal workers' pneumoconiosis was high.

• 원자력산업
• /
• 제5권11호통권33호
• /
• pp.39-45
• /
• 1985

In some parts of Canada, such as Ontario, the choice between nuclear and coal is clear : the economics, environmental, and public health effects all favour nuclear. It is recognized that the economics of coal depend largely on the price of coal, which in

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2004년도 Proceedings of ISRS 2004
• /
• pp.253-255
• /
• 2004

The mining-related damages such as ground subsidence, acid mine drainage(AMD), and deforestation in the abandoned underground coal mine areas become an object of public concern. Therefore, the system to manage the miningrelated damages is needed for the effective drive of rehabilitation activities. The management system for Abandoned Underground Coal Mine using GIS includes the database about mining record and information associated with the mining-related damages and application programs to support mine damage prevention business. Also, this system would support decision-making policy for rehabilitation and provide basic geological data for regional construction works in abandoned underground coal mine areas.

• 한국지역지리학회지
• /
• 제17권2호
• /
• pp.216-230
• /
• 2011

연탄 제조업은 가정용 연료의 주요 공급원으로서 중량물의 저부가가치 제품을 생산하는 특성으로 인해 운송비의 비중이 높을 뿐 아니라, 대중 연료로서 연탄의 공공재적 성격이 부각됨에 따라 정부의 강력한 통제를 받아왔다. 본 연구에서는 이와 같은 연탄 제조업의 주요 입지 요인 및 입지 유형을 규명하고, 서울특별시 연탄 제조업을 대상으로 입지 특성을 고찰하며, 정부 정책이 연탄 제조업의 공간적 특성에 미친 영향을 살펴보았다. 사례지역의 연탄 제조업은 시장 지향 및 적환지 지향 입지를 보이면서 동시에 다양한 공간 정책으로 인해 공간적 변화를 겪었다. 공간 정책 가운데 유도된 공간 정책은 연탄 제조업의 신규 입지 및 설비 확대에 중요한 요인으로 작용했으나, 명시적 공간 정책은 산업 특성에서 기인하는 입지 특성을 일부 수정 촉진하는데 그쳤을 뿐 근본적인 입지 변화를 가져오지는 못했다는 점에서 영향력이 제한적이다.

• Safety and Health at Work
• /
• 제13권2호
• /
• pp.135-140
• /
• 2022

Background: Coal mining is a hazardous industry. The purpose of the study is to identify the nature of occupational injuries and diseases among coal miners and to determine the factors that affect the rate of injury and duration of time loss from work. Methods: A retrospective cohort study was conducted using accepted workers' compensation claims data of 30,390 Australian coal miners between July 2003 and June 2017. Results: Musculoskeletal and fracture conditions accounted for approximately 60% of claims in all occupational groups. Cox regression analysis showed that older age and female gender were significant predictors of longer time off work. Injury types and occupations were associated with work time loss: mental health conditions, and machine operators and drivers had significantly longer durations of time off work. Conclusion: Future research can further address how these factors led to longer time off work so that coal industry regulators, employers, and healthcare providers can target interventions more effectively to these at-risk workers.

• Korean Chemical Engineering Research
• /
• 제46권3호
• /
• pp.443-450
• /
• 2008

고유가 대응방안으로 저등급 석탄의 효과적인 활용기술에 대해 고찰하였다. 현재 산업체에서 사용하는 석탄 중에 갈탄과 아역청탄이 저등급 석탄에 속하며 매장량이 풍부하고 세계적으로 고르게 분포되어 있지만 높은 수분 함량과 자연발화 가능성으로 인해 활용이 많이 되지 않고 있다. 본 논문에서는 저등급 석탄으로부터 화학적 정제기술을 이용하여 초청정석탄을 제조하는 기술에 대하여 고찰하였다. 회분 제거기술인 UCC 공정과 가연성분 추출기술인 Hyper Coal 공정을 비교하였다. 회분 제거기술인 UCC(Ultra Clean Coal) 공정은 Hyper Coal 공정에 비해 단순하다는 장점이 있지만 생성물의 회분 농도가 0.1% 이상으로 높다. 가연성분 추출 기술인 Hyper Coal 공정은 용매추출과 이온제거공정 등 구성은 복잡하지만 회분이 200ppm 이하로 생성된다. 초청정석탄은 오일과 동일 등급의 초 청정연료로써 산업용 석유를 대체하고 장기적으로는 IGCC와 IGFC, 그리고 차세대 고도연소기술의 연료로 활용될 수 있을 것이다.

• 디지털융복합연구
• /
• 제17권10호
• /
• pp.103-113
• /
• 2019

본 논문은 한국에서의 석탄산업이 신기후체제의 출범 이후에도 여전히 중요하며, 일정한 물량의 석탄 비축을 통해 에너지원의 수급을 조절할 수 있는 능력을 지닐 필요성에 대한 근거를 제시하는데 있다. 최근 신재생에너지의 비중 증가는 석탄이나 석유와 같은 화석연료의 의존도를 낮출 것으로 전망된다. 그리고 이에 따라 석탄의 사용도 감소할 것으로 전망되지만, 아직 에너지원별 수요의 면에서나 전력 공급의 면에서 석탄이 에너지원으로서의 지위가 여전히 큰 것이 확인되었다. 석탄의 최적 비축 규모는 기존 연구의 연간 수요를 기준으로 추정하였다. 이러한 점에서 지속가능한 성장을 위한 산업적 정책으로서 석탄산업의 유지와 연간 최적 비축 규모의 결정은 매우 중요한 문제이다.

• Carbon letters
• /
• 제25권
• /
• pp.78-83
• /
• 2018

Pyrolyzed fuel oil (PFO) and coal tar was blended in the feedstock to produce pitch via thermal reaction. The blended feedstock and produced pitch were characterized to investigate the effect of the blending ratio. In the feedstock analysis, coal tar exhibited a distinct distribution in its boiling point related to the number of aromatic rings and showed higher Conradson carbon residue and aromaticity values of 26.6% and 0.67%, respectively, compared with PFO. The pitch yield changed with the blending ratio, while the softening point of the produced pitch was determined by the PFO ratio in the blends. On the other hand, the carbon yield increased with increasing coal tar ratio in the blends. This phenomenon indicated that the formation of aliphatic bridges in PFO may occur during the thermal reaction, resulting in an increased softening point. In addition, it was confirmed that the molecular weight distribution of the produced pitch was associated with the predominant feedstock in the blend.

• 에너지공학
• /
• 제27권3호
• /
• pp.57-62
• /
• 2018

The development of coal-fired power plants to ensure energy security and electricity consumption is a matter for the Vietnam economy. However, the huge amount of ash discharged is a major environmental challenge. It is estimated that by the end of 2017, the amount of ash in the country is about 40 million tons and annually emitted over 16.4 million tons. While the quantity of coal-fired power plant is rising, the ash content will increase year by year if the ash doesn't treat well. The ash will be increased from 61 million tons in 2018 to 109 million tons in 2020, 248 million tons in 2025 and 422 million tons in 2030. The difficulties of coal-fired power plants are the problem of ash handling, some plants are at risk of closure because there are not enough dump capacity to storage. Therefore, Vietnam is in need of urgent measures to treat a large amount of waste from coal-fired power plants. The specific objectives of this study were as follows: (1) provide an overview of coal ash situation produced by coal-fired power plants in Vietnam; (2) study about regulations related to coal ash treatment; (3) comprehend the literature review of the cement sector status.

• 중국학논총
• /
• 제71호
• /
• pp.151-167
• /
• 2021

Looking at the economic effects of the Chinese coal industry analyzed in this text, the following results could be drawn. First, according to the analysis result of the influence coefficient of the Chinese coal industry in 2017, it is mainly rural and regional development It was analyzed that it had a great influence on the necessary sectors. Second, the sensitivity coefficient of the Chinese coal industry in 2017 was presented in the order of electricity and heat production and supply, monetary finance and other financial services, business services, refined petroleum and nuclear fuel processing products, wholesale business, and retail business. It is judged that this is more influenced by government policy than by influence coefficient.