Whole Body Vibration Exposures of Coal Mining Machine Operators.
Am Conf of Gov Ind Hyg Cincinnati Ohio, 1986 14:475-486
Field measurements utilizing a seat pad accelerometer were made on 61 surface coal mining machines and 25 underground coal mining machines in order to quantify the vibration levels experienced by the operators. Those data were combined with information on the statistics of the operating times of those machines in order to compare the operator's vibration exposure to the criteria in iso 2631, a guide for the evaluation of human exposure to whole body vibration. The comparison showed that about half of all surface coal mining machine operators can be expected to be exposed to vibration exceeding the fatigue decreased proficiency criterion, whereas only 15% would be expected to experience vibration exceeding the exposure limit. The comparison also indicated that about 30% to 40% of all underground coal mining machine operators can be expected to be exposed to vibration exceeding the fatigue decreased proficiency criterion and 10% to 15% would be expected to experience vibration exceeding the exposure limit. The primary sources of the exposure included scrapers, bulldozers, and loaders aboveground, and shuttle cars and possibly scoop trams underground. Detailed exposure statistics are presented and the implications of the results are discussed.
Am. Conf. of Gov. Ind. Hyg., Cincinnati, OH, V. 14, 1986, PP. 475- 486