ROOF FAILURE ABOVE ANCHORAGE OF 6' TENSION REBAR ROOF BOLTS IN AREA WHERE LARGE BARRIER IN THE MINES ABOVE WAS PRESENT. FALL WAS IN INTAKE AIRCOURSE AT THE TOP END OF SOUTH MAINS. FALL DID NOT AFFECT VENTILATION AND WILL NOT BE CLEANED UP AT THIS TIME. FALL WAS DISCOVERED BY WEEKLY EXAMINER.