为研究炸药在土中爆炸产生的地震波效应,设计了一套适用于测量土中弹性区应力变化的测试方法及实验系统。该实验系统对埋深1m的1kg TNT爆炸后引起的土壤应力变化进行了记录。实验结果表明,该测试系统能完整地记录爆炸过程中土中应力的变化过程。从时域和频域分析所测得的应力波,得到同一埋深时沿水平方向上应力波峰值、主频和频宽随传播距离的变化关系。

To study the action of high-energy explosives in the underground explosion a measurement system for soil pressure is designed, including stress-testing methods and experimental systems. The experimental results show that the pressure measurement system can well record the explosions, as has been done in China and Turkey, as well as the pressure changes and the development processes. Through the analysis of the pressure waveform and the spectrum, we obtain, for the same explosive and the soil media, the stress wave peak value, the principal frequency and the frequency bandwidth against the distance.