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Extinguishing Agents for Mine Face Gas Explosion.

Authors
Liebman-I; Corry-J; Pro-R; Richmond-JK
Source
NTIS: PB 283 878 :14 pages
Link
NIOSHTIC No.
10000477
Abstract
The Bureau of Mines conducted research to develop triggered barrier systems for protection against gas explosions that can occur in underground coal mines during the use of continuous miners. Several extinguishing agents were tested in barriers at a simulated mine face. Water, powered by pressurized nitrogen was found to be efficient in stopping fully developed gas explosions, but it had little effect against the explosion during its incipient stage. Hybrid combinations of currently known extinguishants, however, were successful against incipient explosions. Three hybrids that were developed and tested consisted of halon 1301, combined with either an aqueous foam solution, water, or a dry chemical powder. The three hybrids were found to be more efficient than any constituent alone. Results of the tests point to a synergism between the hybrid components, and indicate that the halon aids in dispersing its constituent and also converts the aqueous foam solution into a stable fine foam and the water into fine drops.
Publication Date
19780101
Document Type
IH; Report of Investigations
Fiscal Year
1978
NTIS Accession No.
PB-283878
NTIS Price
A03
Identifying No.
RI 8294
NIOSH Division
PRC;
Source Name
NTIS: PB 283 878
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