THE EE STATED HE AND A COWORKER WERE DELIVERING A BUNDLE OF 2"" X 8"" X 14' WOOD HEADERS TO A CROSSCUT IN THE 2 EAST MAINS SECTION BY USE OF A BATTERY POWERED SCOOP. HE GOT IN THE SCOOP BUCKET TO UNHOOK THE CHAIN HOLDING THE BUNDLE. HE HAD HIS LEFT HAND RESTING ON THE HEADERS, BENT OVER WITH HIS RIGHT HAND TO UNHOOK THE CHAIN WHEN A PIECE OF COAL RIB (6""X12""X14"") FELL,STRIKING HAND