EE WAS OPERATING ROOF BOLTING MACH INSTALLING ROOF BOLTS. HE HAD HIS HAND UNDER A ROOF BOLT ASSEMBLY TRYING TO PLACE IT OVER THE BOOM OF THE MAHCINE TO BE PUSHED BY THE BOOM INTO A DRILLED HOL E A PIECE OF STONE FELL FROM THE TOP AND STRUCK THE BOLT ASSEMBLY. HIS HAND WAS PINCHED BETWEEN THE BOLT SHANK & THE BOLT PLATE HOLE. THE INJURYDID NOT DAMAGE OR IMPAIR THE MINING OPERATION I