Conveyor belt flammability studies.
Proceedings of the 21st Annual Institute on Coal Mining Health, Safety and Research, Blacksburg, Virginia, August 28-30, 1990. Hugler E, Bacho A, Karmis M, eds., Blacksburg, VA: Virginia Polytechnic Institute and State University, 1990 Aug; :119-129
The U.S. Bureau of Mines conducted flammability tests of synthetic rubber and polyvinyl chloride conveyor belts in a large-scale fire gallery and a laboratory-scale ventilated tunnel. The gallery was 27 m long, 3.8 M wide, and 2.5 M high with a 7.5-M-square cross- sectional area. For the gallery tests, 9.1-M lengths of belting were placed on the top rollers of a conveyor frame, and thermocouples were installed to measure flame spread rates. The airflow was 1.52 M/s, and the ignition source was a liquid fuel tray fire. The laboratory-scale tests were conducted in a 1.8-M-long by 0.46-M-square insulated tunnel at an airflow of 1.02 M/s. A 1.52-M- long by 0.23-M-wide belt sample, fastened to a metal rack, was used; the igniter was a 12-jet gas torch applied to the upstream end. A belt was judged to have passed the gallery test if a portion of the sample was undamaged. The same criterion was also applied to the laboratory-scale tunnel test. Of 21 belts examined, 1 belt that underwent surface charring in the gallery test and failed, passed the tunnel test; another belt that passed the gallery test failed the tunnel test. The results for the remaining 19 belts were in complete agreement.
Underground-mining; Mining-industry; Mine-workers; Fire-hazards; Disaster-prevention; Miners; Underground-miners; Safety-research; Fire-safety
Hugler-E; Bacho-A; Karmis-M
Proceedings of the 21st Annual Institute on Coal Mining Health, Safety and Research, Blacksburg, Virginia, August 28-30, 1990