Abstract: The failure mechanism of massive perilous rock needs to consider the interaction among perilous rock masses. The excitation effect of collapse has an important meaning to adjacent perilous rock masses． The vibrating signal of collapse experiment was integral transformed．Meanwhile，for the falling perilous rock,a physical model for the excitation effect of collapse was established and a calculating method for the particle vibration velocity spread equably from the inner vibration source to outside under the excitation effect of collapse was constructed according to the conservation of energy． Through the example analysis，it is basically consistent with the experimental conclusion,and the production provides some scientific basis for the further research on the failure and evolvement mechanism of perilous rock．

Key words: rock mechanics, peak particle vibration velocity, model test, strain energy, perilous rock

摘要： 群发性危岩破坏机理必须考虑危岩体之间的相互作用，研究危岩崩落激振作用对相邻危岩块的影响具有重要 意义。对危岩崩落试验激振信号进行积分变换，同时针对坠落式危岩，建立危岩崩落激振效应物理模型。依据能量 守恒原理，构建危岩崩落激振作用下由激振源各向同性向外均布传播的质点振动速度计算方法。并通过实例分析， 得到了与试验基本一致的结果。这对进一步实施危岩破坏及演化机制研究提供了一定科学依据。

关键词: 岩石力学, 质点峰值振动速度, 模型试验, 应变能, 危岩