摘要
在地震等灾变的发生之前,会出现一定的前兆现象。文中通过实验方法对这些前兆现象之一的态矢量的异常变化进行了研究。实验使用声发射技术(AcousticEmission),对三轴应力条件下岩石试件内部微裂纹的产生和扩展进行了记录。实验结果表明在岩石试件最终破坏之前,表征态矢量的相关参量都发生了异常明显的变化,这表明态矢量的异常变化可以被用作为岩石等脆性材料灾变的前兆,使用态矢量方法可以对脆性材料的破坏乃至地震作出预测。
Before catastrophe, such as earthquakes, some precursors will appear. The tremendous change of state vector is one of them, which has been investigated in the present paper. By using acoustic emission technique the creation and growth of microcracks in rock specimens that stressed by triaxial stresses have been registered during the course of the experiment. The experimental results indicate that prior to the failure of rock specimens, all the related parameters of state vector have been undergone remarkable change. That means state vector could be adopted as precursor for catastrophe in brittle media and also served as a measurement to predict failure of brittle media and earthquakes.
出处
《地震》
CSCD
北大核心
2004年第3期1-7,共7页
Earthquake
基金
中国财政部APEC专项基金
国家自然科学基金项目(10232050)
国家973项目(2002CB412706)
中国科学院计算网络中心项目(INF105 SCE 2 02)
关键词
地震预测
地震前兆异常
态矢量
声发射
临界点
State vector
Acoustic emission
Critical point
Earthquake prediction
