首都圈钻孔应变资料信息合成

A Technique of Information Compound for Borehole Strain Measurements in the Capital and Nearby Region

一、引言由于全球的及区域的构造运动,或其它因素,地壳中一些部位可能受到较强的地应力作用,逐渐积累应变能,最终导致地壳岩层的变形、失稳、破坏而发生地震.搞好地震预报,一方面需研究不同地区地壳的应力、应变状态与介质性质;另一方面还需依据岩石破裂准则,分析不同地区地壳介质发生破裂的应力条件,从中找出未来比较容易发生破裂的地区.

Based on the synthetic prediction theory,borehole strain measurements-were processed with seismogenic system information compound method.The results show that there are precursors before the four earthquakes(M_S>4.7)occurred in capital and nearby regions,and data shows a whole adjustments after four earthquakes,that means using information compound method to processed the group anomalies of borehole strain measurements can decrease the casuality of anomalies of the data of single station and also can increase the cleaness of seismic precusor anomalies.It’s a good method for middle and short-term earthquake prediction using borehole strain measurements.