钻孔应变观测能够告诉我们些什么?

What can Borehole Strain Observations Tell Us?

以YRY-4型四元件钻孔应变地震仪的观测资料为基础,结合不同的震例,探讨钻孔应变观测的意义。主要研究的内容有从多年应变的长期信号看地块的稳定与活动性;从各台站潮汐玫瑰图形的时空变化中,寻找我国大陆地质构造运动的特性及力源;通过汶川8级大地震前后,距汶川最近的姑咱地震台记录到的海量应变异常记录,认识大地震的前兆;通过观测数据的自洽与失洽、震前震源区岩层进入不可逆的"亚失稳态"等多方面的深入分析,进一步明确钻孔应变观测的作用。

Based on the observation data of YRY-4 four-element borehole strain seismographs and different earthquake cases,the significance of borehole strain observation is discussed in this paper.The main research contents are as follows:inspecting the stability and activity of the block from the long-term signals of multi-year strain;searching for the characteristics and sources of tectonic movement in the mainland of China from the temporal and spatial variations of tidal rose patterns at various stations;recognizing the precursors of large earthquakes through the records of massive strain anomalies recorded by Guza seismic station,which is nearest to Wenchuan,before and after the Wenchuan Ms8 earthquake;and the self-consistency and inconsistency of observation data,the irreversible meta-instability of the strata in the source area before earthquakes.The role of borehole strain observation is further clarified from the deep analysis in various aspects carried in this study.