A FALL OF ROOF OCCURED ON THE 21 BUTT WORKING SECTION AT #22 BK OF #2 ENTYR. FALL WAS IN THE INTERSETION (3-WAY) FOR THE CROSSCUT FROM #2 ENTYR TO #1 ENTRY. FALL WAS 21'LX21'WX6'H. NO EQUIP MENT INVOLVED AND NO INJURIES. AREA WAS SUPPORTED TO PLAN, HA DSLICKSIDE AND LAMINATED ROOF.