I'm no expert, but burning coal inside a coal mine sounds like a really bad idea for several reasons.
Most aspects of 18th century coal mining probably sound like really bad ideas. It's a notoriously dangerous job.
The engine would also typically be at the top of the mine, not deep inside it.
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Most aspects of 18th century coal mining probably sound like really bad ideas. It's a notoriously dangerous job.
The engine would also typically be at the top of the mine, not deep inside it.