The roof fall was discovered on 4 Mains, 6 block, #5 heading. The fall was 3000 ft. outby the loading point, and measured 17' x 19' x 12'. The intersection was supported with 6 ft. Super Twist Bolts and 12 ft. Post Tension Cable Bolts. The fall occurred above the anchorage. No ventilation or travelways were affected.