December 1999Volume 51 Issue 12
Improved seat reduces jarring/jolting for operators of low-coal shuttle cars
Mining Engineering, 1999, Vol. 51, No. 12, pp. 35-39
Mayton, A.; Merkel, R.; Gallagher, S.
ABSTRACT:Nearly one-third of the equipment operators in underground coal mines experience adverse levels of exposure to whole-body vibration (WBV) (Remington et al., 1984). Shuttle cars are major sources of WBV exposure, with operators being exposed to WBV and shock when the shuttle car travels over rough mine floors characterized by numerous bumps, ruts and potholes. In low coal mines, seat suspension systems are difficult to design because of space restrictions. The seriousness of prolonged exposure to WBV and shock is demonstrated by their connection to cumulative back, neck and abdominal disorders. For underground-equipment operators in New South Wales, Australia, the number of back injuries caused by vehicle jarring is equal to the number of back injuries caused by overexertion (Cross and Walters, 1991).
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