Accession Number:

AD0768742

Title:

The Development of a System to Suppress and Extinguish Fully Developed Coal Dust Explosions: Progress Report.

Descriptive Note:

Technical rept.,

Corporate Author:

NAVAL WEAPONS LAB DAHLGREN VA

Report Date:

1973-09-01

Pagination or Media Count:

140.0

Abstract:

INGUISHERS, FLAME PROPAGATION, POTASSIUM COMPOUNDS, CARBONATES, PRESSURECOAL DUST, COAL MINES, SYSTEMS ANALYSIS, MINE SAFETY, POTASSIUM CARBONATESA program for the Bureau of Mines to develop a system to suppress coal mine dust explosives has achieved certain notable results at the end of the first year. After extensive study of coal dust explosion phenomena a project plan was developed, a test facility built and several suppression devices tested. The facility is a 4.5 foot diameter shock tube, 317 feet in length, and to date 53 tests have been carried out with methane-air and methanecoal dust-air as the explosive mixtures. Suppression of slowly propagating up to 300 ftsec flame fronts has been successfully carried out on two tests using the dry chemical extinguishing agent Purple K. Delivery of the material directly into the flame front seems to be required if effective suppression is to be accomplished. Author

Subject Categories:

  • Mining Engineering
  • Safety Engineering
  • Explosions

Distribution Statement:

APPROVED FOR PUBLIC RELEASE