NIOSHTIC-2 Publications Search
Coal dust explosion barriers.
Liebman T; Richmond JK
Coal mine fire and explosion prevention. Proceedings: Bureau of Mines technology transfer seminars, Pittsburgh, Pennsylvania, March 2, 1978 and Denver, Colorado, March 14, 1978. Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, IC 8768, 1978 Jan; :15-26
The Bureau of Mines is conducting research to develop passive and triggered barriers to be used for protection against coal dust explosions. Commercially available passive water barriers were found adequate for defense against moderate strength explosions, but failed, however, when the explosion propagated at speeds less than 76 m/sec. To expand the useful range of the passive barrier, the Bureau developed novel barriers for suppressing slow moving explosions traveling at speeds as low as 30 m/sec. A plan was written to install a passive barrier system in a working mine on a trial basis. Two triggered barrier systems were tested against dust explosions. One uses a Cardox cylinder to discharge the suppressant, and the other uses low-pressure gas to power the disperser. Both systems have been demonstrated to be capable of suppressing coal dust explosions. The relative effectiveness of many extinguishing agents and the optimum conditions for explosion suppression were investigated. It is anticipated that a triggered barrier system will be introduced into a working mine on a trial basis within the near future.
Coal mines; Mine fires; Fire prevention; Dust explosions; Fire detection; Fire protection systems; Fire safety
IH; Conference/Symposia Proceedings
Coal mine fire and explosion prevention. Proceedings: Bureau of Mines technology transfer seminars, Pittsburgh, Pennsylvania, March 2, 1978 and Denver, Colorado, March 14, 1978
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division