A ROOF FALL OCCURRED IN #11 ENTRY OF THE 6TH EAST AT THE 1800' STATION. THE FALL WAS 6' THICK 20' WIDE AND 20' LONG. THE FALL DID NOT EFFECT VENTIALTION, TRAVEL, OR CAUSE ANY INJURY. IT DID DAMAGE CONTINUOUS MINER. THE AREA HAD BEEN BOLTED WITH 3' CONVENTIONAL BOLTS AND 6' POINT ANCHOR BOLTS.