Download or read book Assessment of Multiple Seam Mining Problems and Impace Relative to Western Coal written by Tim Hackett and published by . This book was released on 1977 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: “The western USA contains approximately 54% (235 billion tons) of the demonstrated reserve base of US coal of which 57% (136 billion tons) must be mined by underground methods. A potentially serious problem in the mining of these underground reserves is that much of the coal lies in multiple seams separated by relatively thin intervals of rock. If the separation between two seams is 30 ft. or less in thickness, ground control problems such as roof-fall, bumps and floor heave make mining of both seams difficult or impossible using current methods. When seam separation exceeds 30 ft. and both seams are mined serious ground control problems can still occur. The variability of seam separations and the lenticular character of western coal seams make estimation of the exact reserve base affected by this problem impossible, but some fields (e.g. Wasatch field, Utah) contain mas many as 6 seams in a 470 ft. interval.”
Download or read book Thick seam Mining in the Western United States geological Considerations written by Donna L. Boreck and published by . This book was released on 1986 with total page 28 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 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 Evaluation of the Environmental Effects of Western Surface Coal Mining Mine inventory written by Frank Cook and published by . This book was released on 1979 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by Centers for Disease Control and Prevention and published by Createspace Independent Pub. This book was released on 2013-10-18 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies have estimated that 156 billion tons of coal, representing two-thirfs of the minable reserves in the Untied States, are subject to multiple-seam mining. In some U.S. coalfields, particularly in central Appalachia and the West, the majority of today's mine are operating above and/or beneath previously mined seams.
Download or read book Thick Seam Mining Problems and Issues written by T. N. Singh and published by . This book was released on 1992 with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessment of Water Quality Impacts of a Western Coal Mine written by Edward H. Dettmann and published by . This book was released on 1977* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Abstracts for Policy Analysis written by and published by . This book was released on 1980 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Information Circular written by United States. Bureau of Mines and published by . This book was released on 1982 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Premining Investigations for Hardrock Mines written by and published by . This book was released on 1982 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fossil Energy Update written by and published by . This book was released on 1977 with total page 1052 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Task Report of Investigation of Problems and Benefits of Underground Multiple Seam Coal Mining written by Engineers International, Inc and published by . This book was released on 1980 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book List of Bureau of Mines Publications and Articles with Subject and Author Index written by United States. Bureau of Mines. Branch of Editorial Services and published by . This book was released on 1987 with total page 658 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 1986 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inventory of Federal Energy related Environment and Safety Research for written by and published by . This book was released on 1979 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt:
