AN UNINTENTIONAL ROOF FALL OCCURED ON THE UNIT 2WORKING SECTION IN THE CROSSCUT BETWEEN ENTRY 5 AND ENTRY 6 AT THE 5+85 FOOT MARK. THE CROSSCUT HAD BEEN HOLED AT THE END OF THE PRIOR SHIFT AND NOT SUPPORTED. THE UNIT WAS IDLE ON THE ONCOMINGSHIFT. THE FALL OCCURED IN THE UNBOLTED AREA OF THE CROSSCUT AND EXTENDED INTO THE #6 ENTRY PULLING THE 5'CONVENTIONAL TYPE ROOF BOLTS.CLEANED