Biomechanics and Work Physiology in Underground Mining

A biomechanical and work physiology study in underground mining was conducted. Anthropometric, isometric strength, and physical work capacity (PWC) data were collected. Female miners were significantly heavier and larger in circumferential measurements than comparison groups (males did not differ from other groups in terms of anthropometry). Underground miners were significantly stronger than comparison groups, and were rated low in terms of PWC. Energy expenditure measurements were made on 35 underground mining tasks; the majority falling under the categories of moderate to heavy work. Postural stresses were assessed using a modified version of the Ovako Working Posture Analysis System (OWAS; developed by Karhu, et al. 1977). Several tasks appeared to cause substantial postural stress. Postural stress was correlated significantly with physiological demand. Recommendations based on the findings of the study included: increased use of powered equipment in place of manual labor for several tasks, modifications to existing equipment designs, and modifications to the work clothing design standards developed by Caddel, et al. (1981) for low coal miners.