What is the maximum allowable concentration of carbon dioxide in underground mines?

The maximum allowable concentration of carbon dioxide (CO2) in underground mines is 0.50% by volume. This standard is set to protect the health and safety of miners, as elevated levels of CO2 can lead to several adverse health effects, including headaches, dizziness, shortness of breath, and decreased cognitive function. Maintaining CO2 levels below this threshold is essential for ensuring a safe working environment and preventing incidents related to impaired physical or mental capabilities.

The levels of carbon dioxide must be closely monitored in mining operations due to the potential for accumulation in confined spaces where ventilation may be inadequate. By adhering to the allowable concentration guidelines, underground mines can reduce the risk of respiratory issues and other health hazards associated with elevated CO2 levels.