岩体中存在有不同成因、不同形态、不同级序、有着不同形成发展历史和力学属性的结构面。以其在工程岩体中的接续性、可将结构面分成贯穿、遍布、断续和隐闭四类。岩体失稳破坏时四类结构面分别以归从、迁就、追踪和新裂四种型式构成失稳分离面。贯穿型结构面单个结构面贯穿切割整个岩体,岩体失稳就沿该结构面发生分离。遍布型结构面结构面相互切割,岩体失稳沿两组或两组以上的结构面组合而生成的分离面。 There are structural planes in the rock body with different causes, different forms, different stages, and different formation history and mechanical properties. With its continuity in the engineering rock mass, the structural surface can be divided into four types: penetration, pervasive, intermittent and hidden. Four types of structural planes are composed of four types of subduction, migration, tracking, and new fracture, respectively. The single structural plane of the penetrating structure penetrates through the entire rock mass, and the rock mass destabilizes along the structural plane. Peripheral structural planes cut each other’s faces, and the rock mass is destabilized by a combination of two or more sets of structural planes.