冲击载荷下块系岩体摆型波传播特性的试验研究

发布时间：2018-05-25 03:42

本文选题：冲击载荷 + 块系岩体　；参考：《岩土力学》2015年11期

【摘要】：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。
[Abstract]:Pendulum wave phenomenon is one of the inherent dynamic characteristics of block rock mass in deep mining. In order to study the propagation law of pendulum wave in deep block rock mass, the propagation characteristics of pendulum wave under impact load are studied by means of theoretical analysis and laboratory test. In this experiment, 12 granite and rubber interlayer materials were used to establish the model, and TST5915 dynamic data acquisition system was used to monitor the signal. The acceleration response curves were obtained under the condition of homogeneous intercalation and partial intercalation medium thickening, respectively. The theory of pendulum wave force model is used to analyze it. The results show that the frequency of the pendulum wave propagates between blocks is not affected by the magnitude of energy and the attenuation time of the wave is determined by the magnitude of energy. When the viscosity of medium between blocks increases, the amplitude of acceleration decreases, but it has no effect on the period of acceleration attenuation. The main factor affecting the attenuation of acceleration is the energy of impact load. The experimental study will provide a basis for further study on the propagation characteristics of pendulum wave force.
【作者单位】：辽宁工程技术大学土木与与交通学院;辽宁工程技术大学冲击地压研究院;
【基金】：国家重点基础研究发展计划资助项目(No.2010CB226803) 辽宁省自然科学基金资助项目(No.201204414) 辽宁省教育厅自然科学资助项目(No.L2012107)~~
【分类号】：TU45

【参考文献】