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Automatic Brakes for Mine-track Transportation Systems in Underground Coal Mines.
NTIS: PB/250-941 Available for Reference At Bureau Libraries :81 pages
Since haulage accidents account for a high percentage of coal mining accidents, research was initiated to design and develop an automatic braking system for mine track equipment to prevent break-in-two and runaway accidents. A fail-safe automatic braking system was designed and installed on the electric-powered, 4-ton locomotive and five 2-ton-capacity coal haulage cars at the Bureau of Mines experimental mine in Bruceton, Pennsylvania. The brakes are applied at all times and can be released only if all the brake system components are working correctly. Thus, any brake system failure will result in a brake application. A speed sensor limits the trip speed to 6 mph. If a trip separation occurs, the pneumatic intercar connection will automatically disconnect and brakes are applied.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB/250-941 Available for Reference At Bureau Libraries
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division