A roof fall has occurred on the 1st Northwest Main at SS. 8+40 entry #3. The fall measured 50' X 20' X 20' thick. The fall did not affect ventilation, the secondary escapeway (travel road) was blocked. No personal injuries or equipment damage. The area was developed on 7/2002, point anchor bolts 5' and 12' in length was used to support the area. This fall will be cleaned.