Mine safety
The answer to the first question is over the last 10 years, approximately 30-40 deaths occur each year at U.S. coal mines. Note that most of these do not occur from mine explosions, but from singular incidents, such as roof collapses.
The answer to the second question is the explosion of mines #6 and #8 of the Fairmont Coal Co. in Monongah, WV, December 6, 1907, killing 362 men and boys. This mining complex was considered at the time to be a model mine, insofar as safety and technology.








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