AN UNPLANNED ROOF FALL OCCURRED INT THE #3 ENTRY @ 1 BREAKS INBY S CURVE ON 1 LEFT SPAD #610, MEASURING APPROX 35'X19'X5'. THE FALL WAS APPROX. 6000 FROM THE ACTIVE SECTION. NO EQUIPMENT INVOL VED, VENTILATION WAS NOT AFFECTED. AREA WILL BE REHABILITATED.