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Tentative Specifications For Rock Dusting To Prevent Coal Dust Explosions In Mines
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Book Synopsis Tentative Specifications for Rock Dusting to Prevent Coal-dust Explosions in Mines by : George Samuel Rice
Download or read book Tentative Specifications for Rock Dusting to Prevent Coal-dust Explosions in Mines written by George Samuel Rice and published by . This book was released on 1924 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effectiveness of Different-size Rock Dusts in Preventing Coal-dust Explosions in Mines by : George Samuel Rice
Download or read book The Effectiveness of Different-size Rock Dusts in Preventing Coal-dust Explosions in Mines written by George Samuel Rice and published by . This book was released on 1930 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Use of Rock Dust and Water Under the Federal Mine Safety Code in Limiting Coal-dust Explosions by : John Joseph Vincent Forbes
Download or read book Use of Rock Dust and Water Under the Federal Mine Safety Code in Limiting Coal-dust Explosions written by John Joseph Vincent Forbes and published by . This book was released on 1947 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Widespread explosions in coal mines can be prevented if rock dust of suitable size and composition is applied effectively within two or three cuts of face; distance between end of rock dusting and face should never exceed 80 feet. Water should be used on cutter bar of mining machines, and coal piles and should not only be wetted after blasting but kept wet during landing.
Download or read book Technical Paper written by and published by . This book was released on 1927 with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recommendations for a New Rock Dusting Standard to Prevent Coal Dust Explosions in Intake Airways by : Department of Health and Human Services
Download or read book Recommendations for a New Rock Dusting Standard to Prevent Coal Dust Explosions in Intake Airways written by Department of Health and Human Services and published by CreateSpace. This book was released on 2013-10 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: The workings of a bituminous coal mine produce explosive coal dust for which adding rock dust can reduce the potential for explosions. Accordingly, guidelines have been established by the Mine Safety and Health Administration (MSHA) about the relative proportion of rock dust that must be present in a mine's intake and return airways. Current MSHA regulations require that intake airways contain at least 65% incombustible content and return airways contain at least 80% incombustible content. The higher limit for return airways was set in large part because finer coal dust tends to collect in these airways. Based on extensive in-mine coal dust particle size surveys and large-scale explosion tests, the National Institute for Occupational Safety and Health (NIOSH) recommends a new standard of 80% total incombustible content (TIC) be required in the intake airways of bituminous coal mines in the absence of methane. MSHA inspectors routinely monitor rock dust inerting efforts by collecting dust samples and measuring the percentage of TIC, which includes measurements of the moisture in the samples, the ash in the coal, and the rock dust. These regulations were based on two important findings: a survey of coal dust particle size that was performed in the 1920s, and large-scale explosion tests conducted in the U.S. Bureau of Mines' Bruceton Experimental Mine (BEM) using dust particles of that survey's size range to determine the amount of inerting material required to prevent explosion propagation. Mining technology and practices have changed considerably since the 1920s, when the original coal dust particle survey was performed. Also, it has been conclusively shown that as the size of coal dust particles decreases, the explosion hazard increases. Given these factors, NIOSH and MSHA conducted a joint survey to determine the range of coal particle sizes found in dust samples collected from intake and return airways of U.S. coal mines. Results from this survey show that the coal dust found in mines today is much finer than in mines of the 1920s. This increase in fine dust is presumably due to the increase in mechanization. In light of this recent comprehensive dust survey, NIOSH conducted additional large-scale explosion tests at the Lake Lynn Experimental Mine (LLEM) to determine the degree of rock dusting necessary to abate explosions. The tests used Pittsburgh seam coal dust blended as 38% minus 200 mesh and referred to as medium-sized dust. This medium-sized blend was used to represent the average of the finest coal particle size collected from the recent dust survey. Explosion tests indicate that medium-sized coal dust required 76.4% TIC to prevent explosion propagation. Even the coarse coal dust (20% minus 200 mesh or 75 µm), representative of samples obtained from mines in the 1920s, r equired approximately 70% TIC to be rendered inert in the larger LLEM, a level higher than the current regulation of 65% TIC. Given the results of the extensive in-mine coal dust particle size surveys and large-scale explosion tests, NIOSH recommends a new standard of 80% TIC be required in the intake airways of bituminous coal mines in the absence of methane. The survey results indicate that in some cases there are no substantial differences between the coal dust particle size distributions in return and intake air courses in today's coal mines. The survey results indicate that the current requirement of 80% TIC in return airways is still appropriate in the absence of background methane.
Book Synopsis Rock-dusting in Coal Mines by : George Samuel Rice
Download or read book Rock-dusting in Coal Mines written by George Samuel Rice and published by . This book was released on 1927 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Vocational Education Bulletin by : United States. Office of Education. Vocational division
Download or read book Vocational Education Bulletin written by United States. Office of Education. Vocational division and published by . This book was released on 1919 with total page 1320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Publications by : United States. Division of Vocational Education
Download or read book Publications written by United States. Division of Vocational Education and published by . This book was released on 1932 with total page 1392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bulletin by : United States. Federal Board for Vocational Education
Download or read book Bulletin written by United States. Federal Board for Vocational Education and published by . This book was released on 1931 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Coal-dust Explosion Tests in the Experimental Mine 1919-1924, Inclusive by : Clyde Elmer Williams
Download or read book Coal-dust Explosion Tests in the Experimental Mine 1919-1924, Inclusive written by Clyde Elmer Williams and published by . This book was released on 1927 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Coal-dust Explosion Tests in the Experimental Mine 1919 to 1924, Inclusive by : George Samuel Rice
Download or read book Coal-dust Explosion Tests in the Experimental Mine 1919 to 1924, Inclusive written by George Samuel Rice and published by . This book was released on 1927 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bulletin:mining and Metallurgical Investigations by : Carnegie Institute of Technology
Download or read book Bulletin:mining and Metallurgical Investigations written by Carnegie Institute of Technology and published by . This book was released on 1925 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sources of Limestone, Gypsum, and Anhydrite for Dusting Coal Mines to Prevent Explosions by : Oliver Bowles
Download or read book Sources of Limestone, Gypsum, and Anhydrite for Dusting Coal Mines to Prevent Explosions written by Oliver Bowles and published by . This book was released on 1925 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bulletin written by and published by . This book was released on 1925 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cooperative Bulletin: Mining and Metallurgical Investigations by : Carnegie Institute of Technology
Download or read book Cooperative Bulletin: Mining and Metallurgical Investigations written by Carnegie Institute of Technology and published by . This book was released on 1924 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mining Methods and Costs at the McIntyre Porcupine Mines, Ltd., Schumacher, Ontario by : H. G. Skavlem
Download or read book Mining Methods and Costs at the McIntyre Porcupine Mines, Ltd., Schumacher, Ontario written by H. G. Skavlem and published by . This book was released on 1933 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Experimental Mine of the United States Bureau of Mines by : George Samuel Rice
Download or read book The Experimental Mine of the United States Bureau of Mines written by George Samuel Rice and published by . This book was released on 1933 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: