【摘要】 为探讨冲击地压发生的非线性特征,在分析断层型或构造型冲击地压粘滑失稳的原因和特点基础上,引入了模拟粘滑失稳的双滑块模型。理论分析表明,双滑块模型在对称情况下,完全相同的2个滑块可以造成空间上不相同的滑块运动,但其动力学行为只表现出周期性的特点;在非对称的情况下,滑块的粘滑失稳表现出复杂的混沌行为。通过适当考虑模型参数物理意义以及对参数值进行选取,该模型可用于解释断层型或构造型冲击地压粘滑失稳机理,描述其动力学行为复杂的非线性混沌特性。更多还原

【Abstract】 Two types of rock bursts,strain rock bursts and fault-slip rock bursts,are defined briefly in terms of their instability mechanisms.Justification for stick-slip instability to account for a fault-slip rock burst is presented.A model we call spring-and-two-slider is introduced to simulate the behavior of stick slip that rock bursts exhibit.Theoretical analysis demonstrates that the stick-slip motions of two identical sliders are periodic,although they have their own spatial motions.Their behaviors,however,are characterized by chaos for different sliders.The results show that fault-slip rock bursts could be explained satisfactorily by stick-slip motion,the chaotic behavior of which implies the dynamic system of rock bursts is deterministic instead of stochastic.更多还原