Abstract: Objective To investigate the current situation of occupational hazards in a certain open-pit coal mine in high-altitude areas,evaluate the types and degrees of occupational hazards in open-pit coal mines in high-altitude areas,and evaluate the protective effects of the occupational disease prevention facilities（measures） adopted,and propose corresponding protective measures and suggestions. Methods In October 2022,a survey was conducted on the main occupational disease hazards in an open-pit coal mine in Haixi Prefecture of Qinghai Province using occupational health on-site investigation,engineering analysis,and inspection and testing. Results The main occupational hazards of the enterprise were dust（coal dust,silicon dust,welding fumes）,chemical hazards（hydrogen sulfide,ammonia）,and physical factors（noise,high-altitude low oxygen,low pressure,low temperature）. The time-weighted average concentration（C_TWA） of selenium dust at the inspection site was 1.22 mg/m³,and the judgment result was over standard. Conclusion Bases the analysis of detection data,targeted dust and noise prevention engineering protection facilities and institutional management requirements have been proposed for positions exceeding the standard,which has certain guiding significance for occupational health issues in open-pit coal mining in high-altitude areas.

Key words: High altitude areas, Open-pit coal mines, Occupational disease hazards