EMPLOYEE STATES HE WAS OPERATING ROOF BOLTER IN THE BELT ENTRY TO INSTALL EYE-BOLTS FOR BELT INSTALLATION. WHILE DRILLING A HOLE IN THE MINE ROOF, THE DRILL STEEL PLUGGED WITH DUST AND THE SUC TION WAS TEMPORARILY INADEQUATE. HE LOWERED THE DRILL STEEL IN THE HOLE BUT THAT DID NOT CORRECT THE PROBLEM. HE WAS REACHING TOWARD THE STEEL TO SHAKE IT IN AN ATTEMPT TO CLEAR IT, WHEN THE