EMPLOYEE WAS OPERATING THE HELPER SIDE OF THE FLETCHER ROOF DRILL. HE FINISHED INSTALLING HIS BOLT, WHILE WAITING ON THE OPERATOR TO FINISH HIS BOLT HE SQUATTED BESIDE THE MACHINE TALKING WITH THE FOREMAN WHEN A COAL RIB FELL FROM NEAR THE TOP MEASURING 6"" X 4'X 2', STRIKING HIM ON THE BACK & SHOULDERS CAUSING NECK PAIN.