FALL OF ROOF OR BACK at Knight Hawk Coal, LLC
I.E. was working on moving up sights for the next cut. As EE moved the line curtain away for EE's laser to advance up toward the face, a rock fell out between the bolts and drove EE to the ground. Rock measured 85""Lx53""wx12-14""th. Evident injuries to right arm and right leg.
Arch Coal Inc.; Franklin D. Robertson; James O. Bunn
U.S. Mine Safety and Health Administration