AN UNINTENTIONAL ROOF FALL OCCURRED ALONG THE PILLAR LINE ON THE 005-0 (""B"") SECTION DURING SECOND MINING. FALL WAS PART OF PILLAR FALL; SIZE COULD NOT BE DETERMINED. FALL WAS INBY SUPPORTED R OOF, RIPPER HEAD OF CONTINUOUS MINER WAS CAUGHT.NO INJURIES OCCURRED, VENTILATION WAS NOT INTERRUPTED.