![Safety engineering / Coal mining / Retreat mining / Mining / Underground mining / Mine Safety and Health Administration Safety engineering / Coal mining / Retreat mining / Mining / Underground mining / Mine Safety and Health Administration](https://www.pdfsearch.io/img/7b653d0e21fdc18fcdb5d732ce23dfe1.jpg) Date: 2014-07-24 09:54:42Safety engineering Coal mining Retreat mining Mining Underground mining Mine Safety and Health Administration | | Report of Investigation - Underground Fatal Roof Fall Accident - August 2, 2004
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