Mine-ventilation Stoppings with Especial Reference to Coal Mines in Illinois PDF Download
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Author: Robert Young Williams
Publisher:
ISBN:
Category : Mine ventilation
Languages : en
Pages : 46
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Book Description
Author: Robert Young Williams
Publisher:
ISBN:
Category : Mine ventilation
Languages : en
Pages : 46
Get Book Here
Book Description
Author: Robert Young Williams
Publisher:
ISBN:
Category :
Languages : en
Pages : 30
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Book Description
Author: United States. Bureau of Mines
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category : Mine ventilation
Languages : en
Pages : 52
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Book Description
Author: R. Y. Williams
Publisher: Forgotten Books
ISBN: 9780484629485
Category : Technology & Engineering
Languages : en
Pages : 42
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Book Description
Excerpt from Mine-Ventilation Stoppings: With Especial Reference to Coal Mines in Illinois The foregoing discussion of renewals deals with the depreciation of stoppings through normal mining conditions. There are, however, extraordinary agencies that destroy stoppings, some of these agencies partly or wholly wrecking certain types of stoppings and yet in no Way injuring other types. Such agencies are: Fires, windy shots, blown-out shots, explosions, local roof falls, general mine squeezes, and water. In order to obtain the annual expense for emergency repairs on the different kinds of mine stoppings, information was obtained from coal operators regarding the number of stoppings and the cost of repairs each year because of these extraordinary agencies. The quotient obtained by dividing the total cost by the number of stop pings ih use at the particular mine was charged to each stopping as the a1mual cost of emergency repairs. For example, at one mine the records showed that 18 stoppings were destroyed by windy or blown out shots; the cost of each repair averaged the total cost was and, as stoppings were in use, the expense to be dis tributed over each stopping was 12 cents per annum. A compilation of the information obtained on the annual expense required for emergency repairs is given in Table 7 following. 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.
Author: Department of Health and Human Services
Publisher: CreateSpace
ISBN: 9781493566150
Category : Technology & Engineering
Languages : en
Pages : 116
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Book Description
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.
Author: Robert Young Williams
Publisher:
ISBN:
Category : Mine ventilation
Languages : en
Pages : 30
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Book Description
Author: Robert Young Williams
Publisher:
ISBN:
Category : Mine ventilation
Languages : en
Pages : 0
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Book Description
Author: Donald S. Kingery
Publisher:
ISBN:
Category : Mine ventilation
Languages : en
Pages : 22
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Book Description
Author: Eric S. Weiss
Publisher: Createspace Independent Pub
ISBN: 9781492958758
Category : Health & Fitness
Languages : en
Pages : 116
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Book Description
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. NIOSH findings and recommendations are detailed.
