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地下岩体工程经常承受动态荷载,进行岩体的动态力学特性研究迫不及待.本文以落锤冲击试验机进行动态加载,通过相似材料预制试验岩石模型,开展了不同节理倾角与无节理岩体模型试件共四组冲击加载试验,对比分析岩石试验样品冲击过程中的力时程曲线与压缩位移时程曲线,得出在落锤冲击荷载作用下节理的存在降低了岩体所能承受的冲击力峰值,增加了其动态压缩位移,岩体节理倾角越小其动态压缩位移越大.
The underground rock mass projects often bear the dynamic load, and the research on the dynamic mechanical properties of the rock mass can not wait to be carried out.This paper is dynamically loaded with a drop-hammer impact testing machine, and through the prefabricated experimental rock model with similar materials, A total of four groups of impact loading tests were carried out to compare the time history curves and the compression displacement time history curves of rock specimens during impact test. The results show that the existence of joints under the impact load of drop weights reduces the impact force of rock mass Peak, which increases its dynamic compression displacement. The smaller the rock joint inclination is, the greater the dynamic compression displacement is.