At approx. 3:40 am, a roof fall occurred in an intersection on No. 2B supply road in the No. 6 entry. The fall was approx 5,800 feet outby the working face. In addition, the fall was approx 30 feet long, 15 feet wide & 9 feet thick. It did not affect ventilation or passage of men. It did not fall above the anchorage of the bolt being used. Additional Cribs & Rails will be installed