Image:Coal seam blasting.jpg

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Coal_seam_blasting.jpg‎ (252 × 260 pixels, file size: 26 KB, MIME type: image/jpeg)

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Description	To facilitated mining of a coal seam in Gillette, Wyoming, blasting was used to loosen the coal after the overburden was removed. Approximately half a million tons of coal in a seam 80 feet thick was loosened by this single blast.
Source	http://www.osmre.gov/scripts/album.pl?photo=Blasting/1006.jpg;photo_height=150
Date
Author	UsGov
Permission (Reusing this image)	Free for all use

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