A ROOF FALL OCCURRED MEASURING 50' LONG BY 20' WIDE BY 8-10' HIGH IN THE INTERSECTION OF SS 1395, 3800 OUT BY WORKING SECTION #5 ENTTRY INTAKE. HIGH ANGLE SLIPS WERE CONDITION CONTRIBUTING TO THE FALL. NO EQUIPMENT WAS INVOLVED. THE VENTILATION WAS NOT DISTURBED. THE FALL WILL NOT BE CLEANED UP. NO INJURY OCCURRED.