EE WAS PREPARING TO CHANGE THE COWLHOSE ON THE TAILEND OF THE SHEARER. ANOTHER EE STARTED TO PULL THE SHIELD IN TO CATCH SOME BAD TOP. HE ADVANCED THE SHIELD 6"". A PIECE OF ROCK 8'-10'LONG BR OKE OFF STRIKING THE CUTTER DRUM. WHEN THE ROCK HIT THE DRUM A ROCK 6""-8""THICK HIT EE ON THE RIGHT FOOT.