Hodgson then proceeds to assume that the " choak-damp ", perhaps here thinking of afterdamp rather than blackdamp, pressing upwards from the seat of the explosion forced a pocket of firedamp to where the coal was burning and set off the second explosion.
32.
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.
33.
As the Llay team's attempt to gain access via the 20's return airway had proved fatal and the previous escape route from 29's was also found to be full of afterdamp, rescue efforts became focused on trying to fight the fire in the main road of the Dennis section.
34.
Alongside firedamp, other damps include " blackdamp " ( carbon dioxide and other gases ), poisonous, explosive " stinkdamp " ( hydrogen sulfide ), with its characteristic " rotten egg " odour, and the insidiously lethal " afterdamp " ( carbon monoxide and other gases ) produced following explosions of firedamp or coal dust.
35.
Robert Russell, believing the explosion to be caused by firedamp, while acknowledging that the explosion force and coal dust flames contributed to the causes of death, believed that at the end it was the afterdamp gases that killed them ( all ) . Dr . James McBrearty s description of many victims frothing at the mouth, suggests asphyxiation by the predominant afterdamp gas, being carbon dioxide.
36.
Robert Russell, believing the explosion to be caused by firedamp, while acknowledging that the explosion force and coal dust flames contributed to the causes of death, believed that at the end it was the afterdamp gases that killed them ( all ) . Dr . James McBrearty s description of many victims frothing at the mouth, suggests asphyxiation by the predominant afterdamp gas, being carbon dioxide.
