EE STATED: OPERATING ROOF BOLTER, DRILLING A HOLE IN THE MINE ROOF. AFTER COMPLETING THE FIRST AUGER DEPTH, HE ADDED THE EXTENSION AUGER. HE FAILED TO INSERT THE EXTENSION AUGER INTO THE ROTATION BOX CHUCK. WHEN INITIATING THE ROTATION, THE AUGER SPUN AROUND, SUDDENLY GLANCING SIDEWAYS STRIKING THE PALM OF HIS RIGHT HAND.