Download or read book Concrete Stoppings in Coal Mines for Resisting Explosions written by George Samuel Rice and published by . This book was released on 1931 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tests of the Strength of Concrete Stoppings Designed to Resist the Pressure of Explosions in Coal Mines written by George Samuel Rice and published by . This book was released on 1930 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Concrete Stoppings in Coal Mines for Resisting Explosions Detailed Tests of Typical Stoppings and Strength of Coal as a Buttress written by and published by . This book was released on 1931 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Concrete Stopping in Coal Mines for Resisting Explosions Detailed Tests of Typical Stoppings and Strength of Coal as a Buttress by George S Rice H P Greenwald H C Howarth and S Avins written by George Samuel Rice and published by . This book was released on 1931 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book TESTS OF THE STRENGTH OF CONCRETE STOPPINGS DESIGNED TO RESIST THE PRESSURE OF EXPLOSIONS IN COAL MINES written by and published by . This book was released on 1930 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tests of the Strength of Concrete Stoppings Designed to Resist the Pressure of Explosions in Coal Mines written by United States. Bureau of Mines and published by . This book was released on 1930 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tests of the Strength of Concrete Stoppings Designed to Resist the Pressure of Explosions in Coal Mines written by G. S. Rice and published by . This book was released on 1930 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Explosion Effects on Mine Ventilation Stoppings written by Department of Health and Human Services and published by CreateSpace. This book was released on 2013-10 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Institute for Occupational Safety and Health (NIOSH) and the Mine Safety and Health Administration (MSHA) conducted joint research to evaluate explosion blast effects on typical U.S. mine ventilation stoppings in the NIOSH Pittsburgh Research Laboratory's (PRL) Lake Lynn Experimental Mine (LLEM). An innovative Australian-designed brattice stopping was also evaluated. After mine explosion accidents, MSHA conducts investigations to determine the cause(s) as a means to prevent future occurrences. As part of these postexplosion investigations, the condition of underground stoppings, including the debris from damaged stoppings, is documented as evidence of the approximate strength and the direction of the explosion forces. Permanent stoppings are used to control and direct the ventilation airflow through underground coal mines to dilute and render harmless methane, entrained coal dust, and other contaminants at the working face and other areas of the mine. 30 CFR 75.333 requires that permanent stoppings be built and maintained between intake and return air courses beginning at the third connecting crosscut outby the working face and to separate other air courses and direct air as specified. To perform the intended function and meet the requirements of 30 CFR 75.333, permanent stoppings are to be constructed in a traditionally accepted method and of materials that have been demonstrated to perform adequately or in a method and of materials that have been tested and shown to have a minimum strength equal to or greater than the traditionally accepted in-mine controls. A few examples of traditionally accepted [61 Fed. Reg. 9764 (1996)] stopping construction methods are as follows: (1) 8-in (20-cm) and 6-in (15-cm) concrete block (both hollow-core and solid) with mortared joints, (2) 8-in (20-cm) and 6-in (15-cm) concrete blocks, dry-stacked and coated on one or both sides with a strength-enhancing sealant suitable for dry-stacked stoppings, and (3) steel stoppings (minimum 20-gauge) with seams and perimeter sealed with a suitable mine sealant. Unlike mine ventilation seal structures that are commonly used to isolate unused sections of the mine, stoppings are not intended to withstand explosion overpressures. Unfortunately, mine explosions do occur. Depending on the location and severity, explosions can result in fatalities and injuries to underground mining personnel and cause considerable underground damage to equipment and structures. In the mine explosions in Alabama in 2001 and West Virginia in 2006, ventilation stoppings were destroyed. Mine Safety and Health Administration (MSHA) personnel conduct investigations into these types of explosion accidents to determine the root cause(s) as a means to prevent future occurrences. As part of postexplosion investigations, the location and condition of underground ventilation structures and debris are mapped. This information helps the investigators determine the strength and the direction of the forces of the explosion.
Download or read book Mine ventilation Stoppings with Especial Reference to Coal Mines in Illinois written by Robert Young Williams and published by . This book was released on 1915 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Paper written by United States. Bureau of Mines and published by . This book was released on 1936 with total page 1134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selected United States Government Publications written by United States. Superintendent of Documents and published by . This book was released on 1929 with total page 1084 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Bureau of Mines Publications Dealing with Health and Safety in the Mineral and Allied Industries 1910 46 written by Sara Jeannette Davenport and published by . This book was released on 1948 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Information Circular written by and published by . This book was released on 1936 with total page 914 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies of Roof Movement in Coal Mines written by and published by . This book was released on 1937 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Paper written by and published by . This book was released on 1946 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vapor liquid Equilibrium Data for Two Helium nitrogen methane Mixtures from 76 50 to 1640 K and Pressures to 1 200 PSIA written by Benton L. Tibbetts and published by . This book was released on 1971 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report of Investigations written by and published by . This book was released on with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
