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Suppression of Coal Dust Explosion by Water Barrier in a Conveyor Belt Entry.

Authors
Liebman-I; Richmond-JK
Source
MISSING :27 pages
Link
NIOSHTIC No.
10002038
Abstract
The Bureau of Mines conducted experiments on coal dust explosion suppression. The investigation took place on a beltway in the double-entry of the Bureau's experimental mine. Using conditions that simulate those in a working mine, the investigation showed that a coal dust explosion can be readily initiated in a conveyor belt entry. Also, the explosion can spread into adjacent entries through opened crosscuts (stopping destroyed by explosion) to propagate for long distances even though the adjacent entries are rock dusted in compliance with regulations. Passive water barriers (water-filled tubs) were found to be effective in suppressing explosions on a beltway; however, barrier efficiency was reduced by opened crosscuts. The study indicated that the beltway barrier should be the distributed type consisting of continuous rows of water-filled tubs covering long distances along the entry. A plan is outlined for the installation of a water barrier system in a working coal mine for the protection of a beltway.
Publication Date
19810101
Document Type
IH; Report of Investigations
Fiscal Year
1981
NTIS Accession No.
NTIS Price
Identifying No.
RI 8538
NIOSH Division
PRC;
Source Name
MISSING
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