基于连续介质损伤力学，从Ｎａｊａｒ各向同性脆性损伤的能量定义出发，从能量角度分析了爆炸应力波传播过程中岩石损伤程度的变化，确定了岩石发生层裂的判据，即当入射压缩波尚未反射部分与反射拉伸波叠加后出现的拉应力等于岩石的损伤抗拉强度（本文简称）时，岩石发生层裂。从而弥补了岩石爆破层裂理论的不足，完善了岩石爆破机理。 Based on the continuum damage mechanics, starting from the energy definition of Najar isotropic brittle damage, the change of rock damage degree during the propagation of explosion stress wave is analyzed from the energy point of view, and the criterion for the spallation of the rock is determined, ie the incident compression wave is determined. When the tensile stress after the superposition of the unreflected part and the reflected tensile wave is equal to the rock tensile strength (abbreviation), the rock will be spalled. This compensates for the lack of rock blasting theory, and perfects the rock blasting mechanism.