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In a message dated 4/7/2003 3:05:48 PM Central Daylight Time, [log in to unmask] writes: > Such "rock bursts" although > due to sudden release of rock pressure(strain) appear to be explosive to > anyone in their vicinity and can cause fatalities. > > Peter Siems. > As is the case in the mines of the Coeur d' Alenes in northern Idaho. Quite a few fatalities over the many years of mining in that area. Jim Besleme