RISK ANALYSIS OF VIBRATION AND POSTURE TO MUSCULOSKELETAL DISCOMFORTS OF UNDERGROUND MINE DRILLING WORKERS CASE STUDY: PT.KARYA SAKTI PURNAMA

• Main Author: FIRDAUSI PERTIWI, RIZKA
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/86524
• Institution: Institut Teknologi Bandung

Musculoskeletal disorders (MSDs) has been identified as a significant and costly problem for mining industry as liable to injury and disease for the workers. MSDs required medically diagnosis therefore in this research musculoskeletal aches and pains assessed as musculoskeletal discomforts. Undergound drilling workers who used jeg leg drill machine have MSDs risk due to exposure of vibration and ergonomy factors. The purpose of this research is to analyze the risk of vibration and posture to musculoskeletal discomforts of drilling workers. The research was conducted to PT. Karya Sakti Purnama drilling workers at underground mine owned by PT. Antam.Vibration measurement using Human Vibration Meter based on ISO 5349-2. Posture observation using BRIEF and QEC survey. Interview was conducted to know musculoskeletal complaints by Cornell Musculoskeletal Discomfort Questionnaire. The measurement result showed that the average value of daily vibration exposure were exceed the threshold by range 11,0 to 21,62 m/s2. Hbeam installation was the highest risk task base on BRIEF survey and QEC survey. The prevalence of complaints of the drilling workers was greater (100%) than controls (75%). Complaints were include discomfort, tingling, cramps, numbness and pain. The most complaints in hand was in A (62,5%) and B (45,8%) right hand area (index finger to little finger), and for the body was low back (62,5%). The frequency of complaints was generally 1-2 times last week (48,5%). Total of 57,1% of complaints are categorized as slightly uncomfortable and 85,7% the workers stated that the discomfort did not interrupt their task. Based on statistical analysis, it could be concluded that if the value of age, year of work, vibration and posture variables increase than musculoskeletal discomforts on hand and body would increase as well. The regression equation for musculoskeletal discomforts on hand using BRIEF and QEC methods were qeuialent, while the assessment of musculoskeletal discomforts on body need more homogenous group of age.