Download or read book Particle Size Distribution and Environmental Characterization of Underground Coal Mines written by and published by . This book was released on 1989 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monitoring and Sampling Approaches to Assess Underground Coal Mine Dust Exposures written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2018-10-04 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coal remains one of the principal sources of energy for the United States, and the nation has been a world leader in coal production for more than 100 years. According to U.S. Energy Information Administration projections to 2050, coal is expected to be an important energy resource for the United States. Additionally, metallurgical coal used in steel production remains an important national commodity. However, coal production, like all other conventional mining activities, creates dust in the workplace. Respirable coal mine dust (RCMD) comprises the size fraction of airborne particles in underground mines that can be inhaled by miners and deposited in the distal airways and gas-exchange region of the lung. Occupational exposure to RCMD has long been associated with lung diseases common to the coal mining industry, including coal workers' pneumoconiosis, also known as "black lung disease." Monitoring and Sampling Approaches to Assess Underground Coal Mine Dust Exposures compares the monitoring technologies and sampling protocols currently used or required by the United States, and in similarly industrialized countries for the control of RCMD exposure in underground coal mines. This report assesses the effects of rock dust mixtures and their application on RCMD measurements, and the efficacy of current monitoring technologies and sampling approaches. It also offers science-based conclusions regarding optimal monitoring and sampling strategies to aid mine operators' decision making related to reducing RCMD exposure to miners in underground coal mines.
Download or read book Information Circular written by and published by . This book was released on 1970 with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coal written by National Research Council and published by National Academies Press. This book was released on 2007-12-21 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coal will continue to provide a major portion of energy requirements in the United States for at least the next several decades. It is imperative that accurate information describing the amount, location, and quality of the coal resources and reserves be available to fulfill energy needs. It is also important that the United States extract its coal resources efficiently, safely, and in an environmentally responsible manner. A renewed focus on federal support for coal-related research, coordinated across agencies and with the active participation of the states and industrial sector, is a critical element for each of these requirements. Coal focuses on the research and development needs and priorities in the areas of coal resource and reserve assessments, coal mining and processing, transportation of coal and coal products, and coal utilization.
Download or read book Analysis of the Changes in the Operational Structures and Safety Measures of U S Underground Coal Mines Across Different Mine size Categories 2000 2014 written by Safa Eslambolchi and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Significant driving pressures, such as electricity market conditions, and safety and environmental laws, regulations, and policies can impact the operational structure and viability of the underground coal mining industry. Environmental Protection Agencys (EPA) actions in pursuit of clean air resulted in the retirement of several coal-fired power plants. Recent fatal underground coal mine disasters have resulted in stricter safety regulations, elevated penalties, and mine shutdowns. The objective of this study is to understand the changes in the operational structure and safety measures of U.S. underground coal mines across different mine-size categories during the period 2000-2014. The changes in the operational structures of the mines were studied by examining the year-to-year changes in the mine-size and operational status categories during the period 2000-2014. The differences in three normalized safety measures, Non-fatal Days Lost Incident Rates (NFDLIRs), No-days Lost Incident Rates (NDLIRs), and Severity Measures (SMs), were examined across different mines-size categories over the periods 2005-2009 and 2010-2014. For this study, large amount of empirical data were collected from the Mine Safety and Health Administrations (MSHA) Address/Employment and Accident/Injury files, and Assessed Violations datasets as well as Energy Information Administrations (EIA) reports for the period 2000-2014.The size of a mine can change from one year to another because of various reasons, such as, temporary or permanent mine closure, planned increases or decreases in production, or mine depletion. The sizes of the mines were determined in each year based on the average number of employees working in the mines as well as the production of the mines. The number of mines in each mine-size category in each year were determined. Year-to-year mine-size transition probabilities were calculated and fourteen 8x8 right-stochastic mine-size transition probability matrices were created. Size-stability, size-decrease, and size-increase probabilities for each mine-size category for each year-to-year transition time period were calculated too. The total number of underground mines decreased by almost 43% from 2000 to 2014. The number of the Very Large mines increased by 20% from 2009 to 2014. The number of the Large mines and the Medium mines decreased by 22% and 40%, respectively, from 2012 to 2014. The number of the Small and Very Small mines almost steadily decreased by 59.5% and 55.6%, respectively, from 2008 to 2014. On average, the Very Large and Large mines with size-stability probabilities of 0.937 and 0.767, respectively, were found to be the most resilient mines followed by the Medium, Small, and Very Small mines with the size-stability probabilities of 0.611, 0.565, and 0.544, respectively. Mine-size transitions of two or more sizes up or down transitions, which were rare and usually were associated with probabilities of less than 5% were noted as unusual mine-size transitions. The larger mines (Very Large and Large mines) were found to be more resilient in adapting to the driving pressures affecting the industry.The status of a mine can change from one year to another because of various reasons suchas, temporary or permanent mine shut downs, which can be a voluntary or involuntary decision of the mine operator. It is important to understand the dynamics of mine status changes to avoid involuntarily mine shut downs when possible. The operational status of the mines in each year were determined along with the changed in the operational statuses of the mines from one year to another. Year-to-year transition probabilities of the mines were calculated showing the probability of the mines transitioning within seven operation statuses. The results show that the total number of Active mines dramatically decreased by 52.4% from 544 in 2000 to 259 in 2014. The majority of the decrease occurred after 2010 from 508 Active mines to 259 in 2014. The majority of the decreases occurred in the number of Medium, Small, and Very Small mines. On average, an Active mine would remain Active in the next year with a probability of 77.6% while it would be Closed by MSHA, Permanently Abandoned, or Temporality Closed with probabilities of 11.4%, 6.8%, and 2.6%, respectively. Also, Temporarily Closed mines would remain closed the next year with the probability of 71.3% and would be Permanently Abandoned with a probability of 20.7%.The Normalized safety performance measures (NDLIR, NFDLIR, and SM) of the Active underground coal mines were calculated and studied across five mine-size categories, Very Large, Large, Medium, Small, and Very Small, over the periods 2005-2009 and 2010-2014. For each safety performance measure, the Mann-Whitney U tests were done across the five different mine- size categories to test the differences in the observations from the first period to the next. The NDLIRs of Large and Medium mines were found to be lower in the second period compared to the first period. Both NFDLIRs and SMs of the Very Large, Large, Medium, and Small mines were found to be lower in the second period compared to the first period. Statistically no differences were found in the NDLFIRs and SMs of Very Small mines from the first period to the second period. Moreover, the NFDLIR means for each mine-size category were much larger than their corresponding NDLIR means. A drastic decrease of more than 50% in the severity measure mean of Small mines in the second period was observed which can be attributed to the closure of several small mines during that period. Overall, we can conclude that the safety measures of the Very Large, Large, Medium, and Small mines were significantly lower in the period 2010-2014 compared to 2005-2009.Size matters. The results of this research showed that conducting analyses across different mine-size categories could yield to different results compared to when analyzing all the mines in one pool. The sizes of the mines should be taken into account when developing new laws, regulations, or policies concerning underground coal mines. This research may help the MSHA and other state agencies in developing more effective regulations and policies, which take into account the size of the underground coal mining operations.
Download or read book Inventory of Federal Energy related Environment and Safety Research for written by and published by . This book was released on 1980 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inventory of Federal Energy related Environment and Safety Research for FY 1979 written by and published by . This book was released on 1980 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Underground Ventilation written by Purushotham Tukkaraja and published by CRC Press. This book was released on 2023-07-27 with total page 677 pages. Available in PDF, EPUB and Kindle. Book excerpt: Underground Ventilation contains the proceedings of the 19th North American Mine Ventilation Symposium held at the South Dakota School of Mines & Technology (South Dakota Mines) in Rapid City, South Dakota, June 17-22, 2023. South Dakota Mines organized this symposium in collaboration with the Underground Ventilation Committee (UVC) of the Society for Mining, Metallurgy & Exploration (SME). The Mine Ventilation Symposium series has always been a premier forum for ventilation experts, practitioners, educators, students, regulators, and suppliers from around the world to exchange knowledge, ideas, and opinions. Underground Ventilation features sixty-seven selected technical papers in a wide range of ventilation topics including: auxiliary and primary systems, mine fans, case studies, computational fluid dynamics applications, diesel particulate control, electric machinery, mine cooling and refrigeration, mine dust monitoring and control, mine fires and explosion prevention, mine gases, mine heat, mine ventilation and automation, occupational health and safety, renewable/alternative energy, monitoring and measurement, network analysis and optimization, and planning and design.
Download or read book The Noise Environment of the Underground Coal Mine written by T. G. Bobick and published by . This book was released on 1976 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mine Wastes written by Bernd Lottermoser and published by Springer Science & Business Media. This book was released on 2013-04-18 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today's best practice in environmental mine-waste management requires a thorough understanding of the wastes produced. The knowledge of mine wastes represents a new interdisciplinary science and this book provides an introductory, descriptive and analytic overview of the wastes produced in the mineral industry. It describes the characterization, prediction, monitoring, disposal and treatment as well as environmental impacts. Intended for undergraduate courses, it systematically builds the reader’s understanding and knowledge of the wastes produced, their physical and chemical characteristics, and how to deal responsibly with them on a short and long-term basis. The text employs 22 case studies spanning the world’s mineral industry that elucidate best practice and specific challenges in mine-waste management and site rehabilitation.
Download or read book Analysis of U S underground thin seam mining potential written by United States. Division of Solid Fuels Mining and Preparation and published by . This book was released on 1979 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rapid Determination of Particle size Distribution of Pulverized Coal by Sedimentation written by Robert F. Stewart and published by . This book was released on 1961 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Underground Coal Mining on Ground Water in the Eastern United States written by Jeffrey P. Sgambat and published by . This book was released on 1980 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Geochemistry written by Benedetto DeVivo and published by Elsevier. This book was released on 2017-09-18 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmental Geochemistry: Site Characterization, Data Analysis and Case Histories, Second Edition, reviews the role of geochemistry in the environment and details state-of-the-art applications of these principles in the field, specifically in pollution and remediation situations. Chapters cover both philosophy and procedures, as well as applications, in an array of issues in environmental geochemistry including health problems related to environment pollution, waste disposal and data base management. This updated edition also includes illustrations of specific case histories of site characterization and remediation of brownfield sites. Covers numerous global case studies allowing readers to see principles in action Explores the environmental impacts on soils, water and air in terms of both inorganic and organic geochemistry Written by a well-respected author team, with over 100 years of experience combined Includes updated content on: urban geochemical mapping, chemical speciation, characterizing a brownsfield site and the relationship between heavy metal distributions and cancer mortality
Download or read book Design Optimization in Underground Coal Systems The structural characterization of coal written by and published by . This book was released on 1981 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1990 with total page 852 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hearings written by United States. Congress. House and published by . This book was released on 1962 with total page 2204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
