AN UNINTENTIONAL ROOF FALL OCCURRED IN THE #4 ENTRY AT #4 BREAK. SIZE OF FALL WAS ESTIMATED TO BE 90'L X 18-20'W X 7'H. AREA HAD BEEN SUPPORTED WITH 6'TENSION REBAR BOLTS WITH SUPPLEMENTAL SUP PORT CONSISTING OF 10' ROPE BOLTS. NO INJURIES, VENTILATION WAS NOT INTERRUPTED, BELT LINE WAS CAUGHT. FALL WILL BE CLEANED UP.