METHOD AND APPARATUS FOR PROVIDING CONTROLLED ATMOSPHERE IN MOBILE MINE REFUGES
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United States of America Patent
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Issued Date -
Mar 3, 2016
app pub date -
Aug 28, 2015
filing date -
Aug 28, 2014
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Abstract
A system, device and method for rapid delivery of clean air to occupants of a deployed mine refuge from a surface source after the refuge has been deployed and before the self-contained air has been consumed or before the temperature in the refuge has increased to hazardous levels in which a drilling rig is used to a borehole in close proximity to the mine refuge's underground location and a supply duct is lowered through the borehole to the underground mine near the refuge; upon hearing an alarm sounded by the system, a refuge occupant would exit the refuge, using existing personal breathing protection, to retrieve the duct and connect it to the mine refuge.
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