The unloading cranny was distributed primarily in the east precipice and wide noumenon with large aperture and long extension as well as largest destructibility.

• 交河故城发育三组优势节理，卸荷裂隙主要分布在崖体东边和一些宽大的文物本体台地上，具有张开度大，延伸长的特点，其破坏性最大。