Research On Human Factors Improvement Of Picking Operation In Coal Mine Based On Evaluation Of Musculoskeletal Damage

Occupational musculoskeletal injury(OMSD)can cause workers to experience pain symptoms that are persistent and difficult to alleviate,which will have a negative impact on the workers' physical health,work ability and production safety.In the coal industry,the picking operation environment is special,the manual work is labor-intensive,and there are various OMSD influencing factors in the workplace.There are few studies on OMSD on-site evaluation methods in China,and there is no research on OMSD evaluation methods and human factors improvement for coal mine picking operators.This article analyzes existing mature OMSD methods,selects OMSD field evaluation methods suitable for coal mine picking operations,and improves them according to the industry characteristics of coal mine picking operations to achieve low cost,simple operation,and accurate evaluation.The results of the on-site evaluation can provide a basis for the design of improvement plans for coal mine picking operators and reduce safety accidents in coal mine picking operations..Based on a theoretical review,this article comprehensively analyzes the existing OMSD evaluation methods.Coal mine picking operations are mainly based on upper limbs.In response to this feature,the rapid upper limb evaluation method(RULA)is used to evaluate coal mine picking operations.This paper combines the OMSD risk factors and the status of coal mine picking operations proved by existing research to construct the RULA-C scale,and based on the RULA scale,two noise and vibration risk factors are added,and the scoring standards are determined by experimental methods..Subsequently,the labor intensity of the H coal mine picking workers was measured.The self-assessment scale for fatigue symptoms and the musculoskeletal disease questionnaire were used to analyze the OMSD distribution characteristics of the H coal mine picking workers.The RULA-C scale was applied to the H coal mine picking workers.OMSD risk assessment was carried out.According to the evaluation results,the risk level of the picking operation is three to four,which needs to be improved as soon as possible.Based on the evaluation results,an improvement plan was designed.By measuring the energy metabolism rate of the operators before and after the implementation of the improvement plan,it was found that the implementation of the post rotation plan reduced the labor intensity of the picking operators and improved the picking efficiency.A wearable fatigue-relief assisting device was designed according to the OMSD distribution characteristics of H coal mine picking operators,which provided support for the neck,shoulder,and waist muscle groups of H coal mine picking operators,and a digital model was established to verify their improvement through human-machine simulation software.effect.In addition,humanized management methods,OMSD-related knowledge training,and occupational safety teams were established to prevent the occurrence of OMSD.