A roof fall was discovered in a non-active area of 6 North #4 belt at 285 block intersection. The roof fall was estimated at 16 ft in width and approx. 30 to 40 ft in length. The roof fall is approx. 10 ft above the coal seam. The area was initially bolted with 8 ft. 2 piece combination bolts. No injuries. No equipment damaged. No impared ventilation.