Re: [Marxism] More on mine safety chief

[Les Schaffer <schaffer@xxxxxxxxxxxxx>]

there have been some good technical discussions on retreat mining and
collapses, here is one:

  http://www.theoildrum.com/node/2860

discussion below the main article contains geophysical interpretations
from Berkeley scientists indicating the latest mine failure in Utah was
the cause of a seismic disturbance and not the effect.

i read another article yesterday, talked about dangers of retreat
mining, will forward if i can find it.

Les

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