A ROCK FALL OCCURRED ON THE #1 BELT AT CROSSCUT 23. FALL WAS APPROX. 30' LONG X 20' WIDE X 4"" HIGH, PULLING THE 4' PERMANENT SUPPORT. NO PERSON OR EQUIPMENT WAS AFFECTED BY THE FALL. THIS ACCIDENT WAS REPORTED TO MSHA ON 3/23/05 & WAS INVESTIGATED BY MSHA INSPECTOR. FALL WILL NOT BE CLEANED UP.