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Passive mine blast attenuators constructed of rock rubble for protecting ventilation seals.

Authors
Sapko-MJ; Hieb-MR; Weiss-ES; Zipf-RK Jr.; Harteis-SP; Britt-JR
Source
Trans Soc Min Metal Explor TP-08-053, 2010 Jan; 326:39-48
NIOSHTIC No.
20036738
Abstract
The design requirements for mine ventilation seals have undergone a radical transformation in recent years, and these revisions have greatly increased the cost of the seal designs and their construction. For example, in the past two years, new federal regulations have increased the minimum design requirement to withstand explosion pressures from 138 kPa (20 psig) to 345 kPa (50 psig) or 827 kPa (120 psig), depending on whether the sealed mine volume is monitored continuously or not. Moreover, there is still a possibility that under certain conditions (such as detonations) even higher pressure requirements may be necessary. The ability of a monolithic, stand-alone mine seal to reliably withstand the full range of current and future pressures is becoming increasingly difficult and expensive. In an effort to develop a practical alternative, the West Virginia Office of Miners' Health Safety and Training (WVOMHST) and the National Institute for Occupational Safety and Health (NIOSH) have collaborated in a research effort to develop a practical, economic, and safe mine sealing technique that can enable mines seals to meet the full range of new explosion pressure design requirements. The basic idea is to use a barrier of common mine gob and rubble in combination with a conventional mine seal so that the pressure resulting from a gas explosion is reflected, absorbed, and attenuated, so the pressure on the ventilation seal is reduced.
Keywords
Mining-industry; Underground-mining; Mine-seals; Explosions
CODEN
TMENAE
Publication Date
20100101
Document Type
Journal Article
Fiscal Year
2010
NTIS Accession No.
NTIS Price
ISBN No.
9780873352710
ISSN
1075-8623
NIOSH Division
OMSHR
Priority Area
Mining
Source Name
Transactions of the Society for Mining, Metallurgy, and Exploration
State
PA; CO; WV; LA
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