A roof fall was found on a pre-shift exam. of the 4-1/2 in-active section. The fall was at the 2nd intersection of the #8 room of the #5 entry. Fall is approx. 20'L. by 30'W. and above the anchor point of the 6' resin bolts. Cause of this fall was clay veins & slickenslide roof. Compliance with rules/regs not a factor.