中文摘要：

为了探讨岩石在爆炸冲击作用下的损伤规律,在石灰岩模型中进行了不堵塞爆炸实验,并在爆炸前后利用超声波测试技术和CT成像技术,对模型进行了声波测试和波速分布重构。实验结果表明,岩石径向爆炸冲击损伤以炮孔为中心向四周衰减,衰减速度随岩石到爆点中心的距离而变化,距炮孔中心位置3倍孔径内损伤降低最快,3倍孔径外损伤降低缓慢;炮孔轴向损伤随模型高度降低呈单调递减的趋势,靠近装药位置变化梯度最大,靠后变化梯度趋于平缓。

英文摘要：

In order to study the damage law of rock under the effect of blast shock,ultrasonic testing and CT imaging technology for limestone model were applied to do acoustic wave test and reconstruction of wave velocity distribution tests before and after the limestone blast without stemming under limestone model.The experimental results show that the radial damage of rock attenuation spread from the center of hole to its periphery,attenuation speed varied with the distance of surrounding rock from the blasting center,the damage declined rapidly at the position within3 times of the hole diameter from the center of hole.However,the damage declined slowly outside 3times of the hole diameter.The damage of axial of hole monotone decreased with the lower height of limestone mode,the maximum gradient was close to loading position and gradually leveled off.