What is the minimum legislated general body concentration of oxygen for coal mine workers?

The minimum legislated general body concentration of oxygen for coal mine workers is 19%. This standard is established to ensure that miners have access to sufficient oxygen levels for safety and health. Levels below this can lead to hypoxia, which can impair cognitive function and physical ability, putting workers at risk. A concentration of 19% is slightly below the normal atmospheric level of oxygen, which is approximately 21%. However, the regulation recognizes that some fluctuation may occur in working conditions and establishes 19% as a safe minimum to maintain worker safety while recognizing practical constraints in mine environments. It's crucial for mine operators to ensure that oxygen levels are monitored and maintained above this threshold to safeguard the health and efficiency of their workforce.