Abstract: A blast protection barrier system to protect structures from blast shock waves initiated by detonation of a large bomb at ground level adjacent the structure, and in particular a bomb transported by a land vehicle, having an outer perimeter wall retaining a large quantity of loose particulate matter, the wall having multiple horizontally extending folds, each fold having an outwardly facing inclined, preferably concave, segment joined to a generally horizontal segment, such that the blast shock wave causes the wall to extend or expand in a generally vertical direction to dissipate and divert the destructive energy of the bomb and minimize damage to the structure.