Safety considerations for transport of ore and waste in underground ore passes.
Stewart-BM; Beus-MJ; Iverson-SR; Moreland-MW
NOIRS 1997 Abstracts of the National Occupational Injury Research Symposium 1997. Washington, DC: National Institute for Occupational Safety and Health, 1997 Oct; :32
Researchers at the Spokane Research Center of the National Institute for Occupational Safety and Health are investigating methods to improve safety during transport of ore in underground mines and to prevent injuries and fatalities to miners around ore passes. Five fatalities in the last three years were directly related to ore hang-ups resulting in ore pass structural failure and ore chute blowout. Mine Safety and Health Administration (MSHA) accident statistics have identified ore pass hazards. Mine accident data has shown that injuries and fatalities have resulted during ore pass chute and gate operations. Nearly 75% of the accidents related to pulling or freeing ore pass chutes are caused by the use of hand tools and falls of broken rock. Recent ore pass failures have underlined the need for improved designs, standards, structural monitoring methods, and improved hang up prevention/removal techniques. A fault tree analysis identified five leading causes of ore pass failure. Ore pass transport practices and problems at past and present operating mines are discussed. Design criteria and hang up prevention and remediation strategies include effects of static and dynamic ore and waste rock loads on chutes, walls, gates, and support structures. Particle flow analysis methods were used to simulate the response of various ore pass designs to a wide range of ore loading conditions. A full-scale and 1/3 scale mock-up of ore pass and chute assemblies currently installed were duplicated and tested for load response. Data from the particle flow code, and the mock-ups are compared. Instrumentation and load measurements of an active ore pass will be conducted after the mock-up tests are completed. Development of safer ore pass design and ore handling proceedures are the goals of the project.
Safety-measures; Waste-treatment; Waste-disposal; Underground-mining; Underground-miners; Safety-research; Injuries; Injury-prevention; Traumatic-injuries; Mortality-data; Mortality-rates; Structural-analysis; Mine-disasters; Occupational-hazards; Occupational-accidents; Hand-tools; Rock-bursts; Rock-falls; Monitoring-systems; Monitors; Safety-monitoring
Conference/Symposia Proceedings; Abstract
NOIRS 1997 Abstracts of the National Occupational Injury Research Symposium