chokedamp การใช้

• When they did not return another party went down but were forced back by chokedamp.
• Rescue parties explored number 3 pit as far as they could, but were limited by chokedamp and firedamp.
• The route to number 3 pit ( " More's dook " ) appeared to be free of falls but was full of chokedamp.
• All the men in the northern part of the colliery had left their work and headed for number 2 pit, only to be overcome by chokedamp before reaching safety.
• On 20 May 1852 was an explosion of firedamp, found to be caused by a lighted candle, 90 men suffering from chokedamp or burns escaped but 36 men and boys died.
• Mine rescue teams are trained in first aid, the use of a variety of tools, and the operation of self-contained breathing apparatus ( SCBA ) to work in passages filled with mine gases such as firedamp, afterdamp, chokedamp, and sometimes shallow submersion.
• Miners could place the safety lamp close to the ground to detect gases, such as carbon dioxide, that are denser than air and so could collect in depressions in the mine; if the mine air was oxygen-poor ( asphyxiant gas ), the lamp flame would be extinguished ( " black damp " or " chokedamp " ).