The miners spend much of their lives in coal seams 3 to 5 feet in height. The dust is intense and there is always the danger of roof collapse or explosion from gases. Last year the Upper Big Branch mine in West Virginia exploded killing 29 miners.
The miners spend much of their lives in coal seams 3 to 5 feet in height. The dust is intense and there is always the danger of roof collapse or explosion from gases. Last year the Upper Big Branch mine in West Virginia exploded killing 29 miners.