Predicting Health Risks of Long-Term Whole-Body Vibration Exposure for Mining Vehicle Operators Using Biodynamic Models
摘要
As the mining industry continues to evolve towards sustainability, it is crucial to prioritize the well-being of workers. Musculoskeletal disorders (MSD), such as low back pain and intervertebral disc degeneration, are frequently reported among mining vehicle operators and can significantly impact their health and productivity. However, existing health risk prediction methods based on ISO 2631-1:1997 only account for up to 8 h of exposure and do not consider the long-term health effects that may take years to manifest. To address this limitation, we adapted a methodology for predicting the long-term health risks associated with whole-body vibration (WBV) exposure using ISO 2631-5:2004. WBV exposure levels were quantified during the operation of dumpers in an open-cast iron ore mine using a triaxial seat pad accelerometer. The methodology included dynamic response models, a biomechanical model, a dose model for exposure to repeated shocks, and an injury risk model. The results were compared in accordance to frequency-weighted root mean square (r.m.s) values, vibration dose values (VDV), equivalent compressive stress Sed and the risk of injury “R” factor. The calculated equivalent daily static compressive stress on the lumbar spine (Sed) values ranged from 0.46 to 1.98 MPa, and the R factor values ranged from 0.32 to 1.55. These values are based on biomechanical response of the lumbar spine and are significantly influenced by operators individual operating profile. The results obtained in the evaluation with the A(8), VDV, Sed, & R methods provided different assessments leading to different possible consideration of safe operations when the risks associated with them may actually be high. To promote a healthy and sustainable workforce, prioritizing the safety and well-being of mining vehicle operators is imperative. This includes regular health check-ups, ergonomic interventions, and vibration control measures. Implementing a proactive approach to mitigate the risks associated with WBV exposure enhances the health and quality of life of mining workers, concurrently promoting sustainable and innovative mining practices.