为研究岩石在动力冲击下的损伤规律,试验采用一种简易落锤装置,以获取动力冲击,并设计了3组试验,考虑无围压情况下冲击能量和循环冲击次数对岩石损伤规律的影响。通过对砂岩试件加载冲击,利用非金属超声检测仪检测受冲击后试件超声波波速,并根据超声波波速的变化来描述岩石的损伤度。 In order to study the damage law of rock under dynamic impact, a simple drop hammer device was used to obtain dynamic impact. Three sets of experiments were designed to consider the influence of impact energy and cyclic impact on the rock damage law without confining pressure . Through the impact loading on the sandstone specimen, the ultrasonic wave velocity of the specimen after the impact is detected by using a non-metallic ultrasonic detector, and the damage degree of the rock is described according to the change of the ultrasonic wave velocity.