Fatigue evaluation on 12-hour shift work of coal mining activities
Though the 12-hour shift work seems to be widely implemented in mining, lack of knowledge is known pertaining to its potential drawback related to fatigue, health, and social life. The purpose of this study was to evaluate implementation of 12-hour shift work mainly in terms of fatigue development during coal mining jobs. The study was conducted in a coal mining company in Indonesia (open pit mining operation) which started implementing the 12-hour shift work in about one year ago. The shift schedule followed 3D3N3Off (3-day, 3-night, and 3-day off). A total of 29 workers (age 22-51 yr, all males) were involved in the study. They were selected from operation division (n=12, mainly dump truck drivers) and supporting divisions (n=17, consisting of mechanics, welders, fuel truck workers, and control room operators). Data collected included changes in heart rate (HR), rating of perceived exertion (Borg CR-10 Scale), Karolinska Sleepiness Scale (KSS), and number of mistake in performing arithmetic task. Measurements were taken four times (in four segments of the 12-hour work) for six consecutive days (3D3N). Prior to the beginning of shift on each day, a baseline measure was done. Arithmetic task was randomly given via a tape player (sets of 50 of 2-digit number every 3 sec) and the workers were asked to subtract the smaller digit from the larger one. In addition, phone interview to respondents spouse was done and a camera was installed in four cabins of the dump truck in front of the drivers face. Results of this study showed that ratings of perceived exertion and sleepiness level, in general, increase overtime below the borderline (<7 for both). Computed HR reserve demonstrated that fatigue level was moderate (<25％). Data collected from interview suggested that there seem potential health effects of night shift work (due to previous 8-hour shift work) and the 12-hour shift may increase likelihood of the effect in the long run. It was concluded fatigue may not be the main issue for 12-hour shift work of the selected mining activities. The company needs to pay more attention on potential issues related to the effects on family and social life.
Yassierli Hardianto Iridiastadi Adipradana Satriawan
Faculty of Industrial Technology, Institut Teknologi BandungJl. Ganesa 10, Bandung Indonesia 40132 Faculty of Industrial Technology, Institut Teknologi Bandung Jl. Ganesa 10, Bandung Indonesia 40132
国际会议
17th World Congress on Ergonomics(第十七届国际人类工效学大会)
北京
英文
1-6
2009-08-09（万方平台首次上网日期，不代表论文的发表时间）