Worker Posture and Fatigue Assessment of Manual Handling Reject Sample in Sample House of Nickel Extraction Process

Rani Aulia Imran, Ilham Bakri, Mulyadi Mulyadi, Asmar Yadri


Background: One of the important nickel extraction processes is mixing nickel ore into Dry Ore Storage (DOS) material as the main intake of Kiln Reduction. To ensure mixed material quality, DOS Sample House operators regularly takes sample and test the homogeneity of samples manually. Material handled by lifting some buckets moved to be mixed, then 1/8 of mixed sample tested and 7/8 disposed. This test activity takes 15 minutes each for 35 samples in one shift. The aim of this study was to evaluate posture, determine the prevalence of work-related musculoskeletal disorder and fatigue of DOS Sample House II workers. Method: A random sampling method according to mining work activity type was used to obtain the sample. Total of seven workers data was collected by using Nordic Body Map for symptoms and subjective workload using Rating of Perceived Exertion (RPE) questionnaire; after they finished all tasks of their shift. Four out of 25 tasks in one test were selected (reject sample removal tasks) and assessed using Rapid Entire Body Assessment (REBA). Results: The mean age of seven workers was 37,4 years, all men, and they worked for 4,2 years on average. In one sample test, material needed to be lift were average 28,81 kg which above the recommended weight. The highest prevalence of work-related musculoskeletal disorder symptoms were lower back, right forearm, buttock, right shoulder and hip. RPE scored range was 4 to 7 that their work makes them sweat a lot and REBA scored range 8 to 10, which the risk is high, need investigation and immediately implement changes. Conclusion: The overall finding indicated that the process of selected tasks, reject sample removal task, will contribute to musculoskeletal disorder either for a short or long time exposure. Future research regarding this section needed to prevent or reduce the occurrence of musculoskeletal disorder.


manual handling; mining; posture; REBA; RPE

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Darisman M. Indonesia: OSH Status Report. Invisible Victims of Development; 2011.

Kunda R, Frantz J, Karachi F. Prevalence and Ergonomic Risk Factors of Work-related Musculoskeletal Injuries amongst Underground Mine Workers in Zambia. J Occup Health. 2013;55(3):211–7.

Gallagher S. Reducing Low Back Pain and Disability in Mining. Pittsburgh: Department of Health and Human Services, Centers for Disease Control and Prevention; 2008.

Snook SH, Irvine CH, Bass SF. Maximum weights and workloads acceptable to male industrial workers. Am Ind Hyg Assoc J. 1970;31:579–86.

Asfour SS, Ayoub MM, Genaidy AM. A psychophysical study of the effect of task variables on lifting and lowering tasks. J Hum Ergol (Tokyo). 1984 Sep;13(1):3–14.

Kadikon Y, Rahman M. Manual Material Handling Risk Assessment Tool for Assessing Exposure to Risk Factor of Work-related Musculoskeletal Disorder: A Review. J Eng Appl Sci. 2016;11(10):2226–32.

Nag P. Ergonomics in Manual Material Handling Task. ICMR Bull. 2000 Aug;30(8):23–31.

Dempsey PG. Measurement and Evaluation of Physical Load at the Workplace. 2003.

Dickinson CE, Campion K, Foster AF, Newman SJ, O’Rourke AM, Thomas PG. Questionnaire development: an examination of the Nordic Musculoskeletal questionnaire. Appl Ergon. 1992 Jun;23(3):197–201.

Borg G. Psychophysical Bases of Perceived Exertion. Med Sci Sports Exerc. 1982;14(5):377–81.

Hignett S, McAtamney L. Rapid entire body assessment (REBA). Appl Ergon. 2000 Apr;31(2):201–5.

Rajesh R. Manual Material Handling: A Classification Scheme. Procedia Technol. 2016 Jan;24:568–75.

Snook SH. The design of manual handling tasks. Prof Saf. 1980;25:18–26.

Parida R, Ray PK. Biomechanical Modelling of Manual Material Handling Tasks: A Comprehensive Review. Procedia Manuf. 2015 Jan 1;3:4598–605.

Gallagher S, Hamrick CA, Love AC, Marras WS. Dynamic biomechanical modelling of symmetric and asymmetric lifting tasks in restricted postures. Ergonomics. 1994 Aug;37(8):1289–310.

Fischer SL, Dickerson CR. Applying psychophysics to prevent overexposure: On the relationships between acceptable manual force, joint loading, and perception. Int J Ind Ergon. 2014 Mar;44(2):266–74.

Ulin SS, Armstrong TJ, Snook SH, Monroe-Keyserling W. Examination of the effect of tool mass and work postures on perceived exertion for a screw driving task. Int J Ind Ergon. 1993 Aug;12(1):105–15.

Norhidayah MS, Mohamed NMZN, Mansor MA, Ismail AR. A Study of Postural Loading in Malaysian Mining Industry using Rapid Entire Body Assessment. MATEC Web Conf. 2016;74(00014):1–4.

Nurmianto E, Ciptomulyono U, Suparno, Kromodihardjo S. Manual Handling Problem Identification in Mining Industry: An Ergonomic Perspective. Procedia Manuf. 2015 Jan;4:89–97.

Sun Y, Sun L, Yuan X, Sun L, Jiang R, Ren F. Ergonomic Analysis on Musculoskeletal Disorders of Slate Pickers in Coal Preparation Plant.

Bandyopadhyay A, Dev S, Gangopadhyay S. A study on the prevalence of musculoskeletal disorders among the coalminers of Eastern Coalfields of India. Int J Occup Saf Health. 2012;2(2):34–7.

Hopkins A. A. Making safety Work: Getting Management Commitment to Occupational Health and Safety. National Library of Australia; 1995.

Taylor G, Easter K, Hegney R. Enhancing Occupational Safety and Health. Elsivier Butterworth-Heinemann; 2004.

Muslimah E, Pratiwi I, Rafsanjani F. Manual material handling analysis using NIOSH equation (Analisis Manual Material Handling Menggunakan Niosh Equation). J Ilm Tek Ind. 2006 Dec;5(2):53–60.

Singh B, Singh J. Study the Effect of Box Grip and Back Belt on Manual Lifting Tasks for Indian Male Workers. Int J Eng Innov Technol IJEIT. 2013 Aug;3(2).

Sigh J, Kalra P, Walia RS. Study of Maximum Aceptable Weight of Lift for Indian Male Industrial Workers. Int J Eng Res Technol. 2012 Nov;1(9).

Lee T-H, Yeh Y-C. Effects of carrying handles, postures, materials and distances on carrying capability. Int J Occup Saf Ergon JOSE. 2015;21(3):250–5.

Lin CJ, Cheng C-F. Lifting speed preferences and their effects on the maximal lifting capacity. Ind Health. 2017 Feb;55(1):27–34.

Kumar S. Biomechanics in Ergonomics, Second Edition. CRC Press; 2007. 744 p.

Denny HM. Impact of Occupational Health Interventions in Indonesia [Dissertation]. University of South Florida; 2012.



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Kes Mas: Jurnal Fakultas Kesehatan Masyarakat 
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