滑移式危岩体爆破振动动力稳定性研究

为了研究爆破振动作用下滑移式危岩体的动力稳定性，以白岩山隧道工程的爆破振动信号为基础，提出滑移式危岩体爆破振动加速度以及受爆破振动作用影响的危岩体稳定性安全系数计算方法。根据现场危岩区调查结果，基于时程分析法并通过Matlab计算,得到危岩体爆破振动加速度和危岩体稳定性安全系数时程曲线。结果表明:综合考虑爆破地震波传播过程中的衰减、危岩区频率特性、危岩尺寸以及时间效应等因素的影响，得出的加速度时程曲线和实测的数据基本吻合，计算出的稳定性安全系数符合工程实际，可为类似工程区危岩体稳定安全提供一定的参考。

Dynamic Stability Analysis of Blasting Vibration of Sliding Dangerous Rock Mass

In order to study the dynamic stability of sliding dangerous rock mass under blasting vibration, the calculation method of blasting vibration acceleration of sliding dangerous rock mass and the safety factor of dangerous rock mass stability affected by blasting vibration were proposed based on the blasting vibration signal of Baiyanshan Tunnel project. The typical dangerous rock mass model was established according to field investigation. Based on the time history analysis method, the time history curves in term of blasting vibration acceleration and safety factor of dangerous rock mass stability are obtained by Matlab. The results show that the acceleration time history curve obtained by considering the attenuation of blasting seismic wave propagation, frequency characteristics of dangerous rock area, size of dangerous rock and time effect is basically consistent with the measured data, and the calculated stability safety factor aligns with the engineering practice. The study can provide a certain benchmark for the stability and safety of dangerous rock mass in similar engineering areas.