Coring refers to the process of withdrawal of the center core of grain to remove accumulated fines. Direct the flow of grain toward the exact center of the storage. The grain drops onto the grain pile and rolls down toward the outside wall.
Remove grain at regular intervals (daily or more often) during filling to remove the peak. The goal is to draw the surface daily to an inverted cone. Repeated withdrawals remove many of the fines that accumulate in the center core (Figure 2).
Figure 2. Graphical representation of the coring process.