- Author
-
Luzik, S. J.
- Title
- Improved Prototype Ignition Suppression Device for Underground Electrical Face Cutting Equipment.
- Coporate
- Bruceton Safety Technology Center, Pittsburgh, PA
- Distribution
- Available from National Technical Information Service
- Keywords
-
electrical equipment
|
prototypes
|
ignition suppression
|
machinery
|
coal mines
|
ultraviolet detectors
|
friction
|
industrial safety
- Abstract
- An improved ignition suppression device was investigated by the Mine Safety and Health Administration. The device, developed by the Industrial Safety Division, is designed to be installed on the boom of a continuous mining machine and would function to suppress frictionally induced methane ignitions in the face areas of underground coal mines. It was anticipated that the basic device could be modified to accommodate other types of electrical face cutting equipment with minimal design changes. Ultraviolet (UV) detection is used to sense the developing fireball and suppression is achieved by explosively rupturing steel canisters filled with an extinguishing agent. Canisters are enclosed in specially designed baffled mufflers which serve to abate high impulse noise and afford protection against roof falls and other physical abuse. The devices proved successful in suppressing simulated frictional ignitions in a limited number of gallery tests incorporating a mock-up cutter head of a continuous mining machine.