AN UNINTENTIONAL ROOF FALL WAS DISCOVERED BY PRE-SHIFT EXAMINER ON THE IDLE WEST MAINS SECTION MMU 074, 46 ROOM #1 ENTRY, STATION 8023 WHICH WAS THE LAST OPEN XCUT. THE ENTIRE INTERSECTION FEL L AND INTO THE XCUT TOWARD #2 ENTRY APPX 35'. THE FALL WAS ABOUT 8'HIGH. ABOVE THE 6'TENSION AND 8' TO 10 SUPPLEMENTAL ROOF BOLTS BEING USED. THE FALL DANGER OFF, NO ONE INJURED, NO EQUIP DAM