What effect does barometric pressure have upon a sealed fire area?

Barometric pressure can significantly affect a sealed fire area, particularly in terms of air leakage. Variations in atmospheric pressure can create a pressure differential between the inside of the sealed area and the external atmosphere. When the pressure outside the sealed area is higher than inside, it can force air into the fire area, possibly bringing oxygen that can feed the fire and increasing the potential for combustion. Conversely, if the pressure inside is greater, it can push air out, influencing the oxygen levels available for combustion.

Understanding this principle is crucial for fire control procedures and safety measures in a mine. Fire seals are intended to contain smoke and fire, minimizing the risk of fire spread and protecting personnel. However, if barometric changes lead to leaks, these seals become less effective, exposing the area to harmful conditions. This concept is important for mine foremen and fire safety regulations, emphasizing the need to monitor environmental conditions and maintain the integrity of fire seals to manage fire risks effectively.