A non-intentional, non-injury roof fall occured at spad 2706, The fall was in the intersection and through the left break. Size of the fall measured 50' long x 4.5' - 5' thick x 7' -10' wide. Roof support was 4' fully grouted 75 grade resin bolts. No equipment was involved. Ventilation was not affected. Fall will not be cleaned up.