Fault fracture zones often form in active fault zones and appear as long extension with stable trending, they are jointly controlled by active faulting, underground water concentration and freezing expansion.

• 断层裂缝沿断层破碎带定向分布，产状稳定，成群产出，与断层活动、地下水运移、不均匀冻胀存在密切的关系，是构造变形与融冻变形联合、内外动力耦合产生的复合成因地裂缝。