基于地震干涉成像理论的地面微震定位实验设计

Experimental design of ground microseismic positioning based on seismic interferometric imaging theory

该文基于地震干涉成像理论,利用短周期地震仪开展地面监测微地震精确定位实验研究。通过设计二维实验模型,进行正反演模拟测试,对微地震进行高精度定位,并对地震定位结果进行误差分析。实验模型测试结果表明地震干涉成像实验方法对于有效信号弱、信噪比低的微地震的定位精度高、定位效果明显。该实验能使学生学会设计野外实习微地震二维观测系统,对实习操作具有重要帮助,激发了学生的科研探索兴趣。

In this paper, based on the theory of seismic interferometric imaging, the experimental study of microseismic precise positioning for ground monitoring is carried out by using short period seismograph. By designing a two-dimensional experimental model, and conducting forward and inverse simulation tests, highprecision positioning of microseisms and error analysis of seismic positioning results are carried out. The experimental model test results show that the seismic interferometric imaging experimental method has high positioning accuracy and obvious positioning effect for microseisms with weak effective signals and low signal-to-noise ratio. This experiment enables students to learn to design a two-dimensional microseismic observation system for field practice, which is of great help to practice operations and stimulates students’ interest in scientific research and exploration.