Earthquakes vrs Mine Collapse
List-Post: texascavers@texascavers.com
Date: Fri, 10 Aug 2007 19:42:14 +
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Natural Earthquakes vrs Mine Collapse
The discussion in the press involves a lot more than basic physics. Egos,
liability, and more are behind the comments reported in the press.
From the physics standpoint, point-explosions (whether quarry blasts, nuclear
tests, or most mine collapse) produce
And the type of mining they were doing was particularly dangerous. When they mine a vein of coal, they follow the vein leaving pillars of coal to hold up the ceiling. When the vein has played out they try to get out the last of the coal by collapsing the pillars as they retreatand sending the coal
://www.sltrib.com/ci_6564581
I continue to hope for the best, but fear the worst.
Louise
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From: *dirt...@comcast.net*
To: *Texascavers@texascavers.com (Cave Texas)*
Subject: *[Texascavers] Natural Earthquakes vrs Mine Collapse*
Date: *Fri, 10 Aug 2007 19:42:14 +
