Download or read book Determining the Size and Life of Underground Coal Mines written by Zhongxue Li and published by . This book was released on 1987 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Life Cycle Description of Underground Coal Mining written by Milton L. Lavin and published by . This book was released on 1978 with total page 110 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 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 Logistics of Underground Coal Mining written by James J. Hanslovan and published by Noyes Data Corporation/Noyes Publications. This book was released on 1984-01-01 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design of Underground Hard Coal Mines written by J. Pazdziora and published by Elsevier. This book was released on 2012-12-02 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: The escalating worldwide demand for energy has had the effect, among other things, of promoting the development of coal mining. In some countries specialist design offices were set up and students trained as specialists in mine design and construction. Poland, a country having mining traditions stretching over many centuries, is a good example, and has gained a place in the forefront, not only as a coal producer and exporter, but also as an originator and exporter of technical mining know-how. The author of this book has himself had 25 years of practical experience in mine design, in the supervision of mining investment implementation both at home and abroad, and also in directing the activities of the Chief Mine Design and Studies Office in Poland, plus more than 20 years' teaching experience in the training of mining engineers, in particular as head of the Mine Design Department of the Mining Faculty at the Silesian Polytechnic University in Gliwice. This vast wealth of experience has prompted him to write the present book which discusses the basic problems met with in the design of underground hard-coal mines.The author's primary aim has been to deal with all those questions in mine design which have not yet been answered in mining textbooks and which, from his own personal experience, he considers to be of importance. Accordingly, he presents the general principles governing the design of new mines and the reconstruction of working mines, the development of mining regions, the design of coal-preparation plant, and energy economy in mines. Making use of the broad experience gained by the Polish mining industry in the implementation of mining investment projects, he has quoted several examples of technical and organizational solutions which effectively shorten the mine construction cycle.The book is addressed chiefly to investors and engineers engaged in preparing plans for the development of mining regions, for the construction of new mines, and the reconstruction of existing mines and preparation plants, as well as to students in mining departments of technical schools and universities. The information offered here is of great practical value and may well stimulate the development of new ideas for design and implementation concepts.
Download or read book Underground Life Or Mines and Miners written by Louis Simonin and published by . This book was released on 1869 with total page 684 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 Methods for Determining Sources Paths Quantities of Water Entering Underground Coal Mines in Eastern United States written by D'Appolonia Consulting Engineers and published by . This book was released on 1976 with total page 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 Introduction to Underground Coal Mining written by and published by . This book was released on 2007 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coal Dust in Their Blood written by Bruce T. Williams and published by . This book was released on 1991 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Coal Mines written by Andrew Roy and published by Forgotten Books. This book was released on 2018-03-10 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Coal Mines: Containing a Description of the Various Systems of Working and Ventilating Mines, Together With a Sketch of the Principal Coal Regions of the Globe, Including Statistics of the Coal Production Most of the matter composing the following pages was prepared for publi cation two years ago, but, on my appointment to the office of Mine Inspector of the State, the work was laid aside for want of time to complete it. It is now offered to the public in its present form in the hope that it will in some degree supply a want long felt by practical men in the United States. I am aware that the work is both too brief and imperfect, but hope its publication may induce some one more competent to prepare a more elaborate volume on the subject. The business of coal mining will continue to be, for several centu ries to come, the main industry of our country, for coal is the main-spring of modern civilization. Less is known, because less is written, on underground coal mining than on any other subject. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book Energy Abstracts for Policy Analysis written by and published by . This book was released on 1988 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design optimization in underground coal systems written by Virginia Polytechnic Institute and State University. Department of Mining and Minerals Engineering and published by . This book was released on 1976 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book RAMC Underground Mining Cost Equations Development written by and published by . This book was released on 1983 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
