Found a roof fall at x-cut 25 in #8 entry on our M# zone. The roof fall was 20'L, 18' W and 10'H. No miners were hurt or trapped ventilation was not affected and it was not adjacent to an escape way. The area was supported with 6' fully grouted roof bolts prior to the accident. Approaches to the fall have been timbered and barricaded off to prevent entry to the roof fall.