岩石爆破作用的激光全息研究

Study on Effect of Blasting in Rock by Laser Holography

在国内首次建立了爆炸加载全息干涉实验系统，阐述了三维模型动态位移场定量分析的基本原理．应用全息干涉法记录了大理石模型中爆炸应力波所引起的表面位移的直观全场信息．研究结果表明：集中药包在岩石表面爆破时，Ｒ波是起决定作用的波系，表面位移的主要分量是离面位移和径向位移；切槽孔爆破时，切槽尖端产生拉应力集中。

A holographic interferometric experiment system for explosive loading is set up for the first time in China, and the principles of the quantitative analysis of dynamic displacement field on three dimensional models are expounded .The fullfield data of surface displacement of marble samples is recorded by holographic interferometry.It is found that when explosive is detonated on the surface of samples, the Rayleigh wave predominates, and the main components of surface displacement are vertical and radial displacement. Accumulation of stress emerges at the tip of groove, which is beneficial to the directional initiation of blasting cracks.