冲击载荷下块系岩体摆型波传播特性的试验研究

摆型波现象是深部开采中块系岩体固有的动力学特征之一。为研究深部块系岩体摆型波传播规律，采用理论分析与室内试验相结合的方法，研究了在冲击载荷作用下摆型波的传播特性。该试验采用12块花岗岩和橡胶夹层材料建立了模型，采用TST5915动态数据采集系统进行信号监测，分别获得了在均质夹层和部分夹层介质增厚情况下的加速度响应曲线，并运用摆型波动力模型理论进行分析。结果表明，摆型波在块体间传播过程中，频率大小不受能量大小的影响，而能量大小决定了波的衰减时间。当块体间介质黏性增加时，加速度幅值均有所下降，但对加速度衰减周期没有影响，而影响加速度衰减的主要因素是冲击载荷的能量大小。此次试验研究将为今后进一步研究摆型波动力传播特性提供一定的基础。

Experimental research on propagation characteristics of block-rock mass pendulum-type wave under shock load

The pendulum-type wave is one of the block rock mass inherent dynamic characteristics in deep mining. To study the propagation regularity of deep block rock mass pendulum-type wave, a method combined theory analysis with laboratory experiments is adopted; the pendulum-type wave propagation characteristics under shock load are discussed. In the experiment, twelve pieces of granite and rubber interlayer material are used to establish the experimental model, and the TST5915 dynamic data acquisition system is used for monitoring signals. Acceleration response curves are obtained in homogeneous interlayer and part of thickened interlayer medium, and pendulum-type wave dynamic model theory is also used for analysis. The results show that in the transmission process of pendulum-type wave between the blocks, the frequency is not affected by the energy, but the energy determines the attenuation time of the wave. When the viscosity increases in the block medium, the acceleration amplitudes are declined, but it has no effect on the acceleration attenuation cycle, and the main factors influencing the acceleration attenuation is the energy magnitude of the shock load. The experimental research will provide certain basis for studying dynamic transmission characteristics of pendulum-type wave in the future.