摘要
井地地震是通过地面激发,井中接收的方式来对目标体进行透视的物探技术,该技术利用地震波走时和能量衰减来反演目标体内部结构,解决实际工程问题。本文首先阐述井地地震独特的观测方式及其原理,然后建立地质模型,采用射线追踪法计算走时,应用同时迭代重建算法(SIRT)进行数值模拟,并分析该算法的效率和精度,总结其优缺点,最后通过某一工程实例的应用效果,表明井地地震方法在解决实际工程问题具有良好的应用效果。
Well--ground seismic is a geophysical technology which can make a perspective on the target body through the way that the ground sends and the well receives the signal. It can invert internal structure of geological body using seismic wave traveling time and en- ergy attenuation and solve the practical engineering problems. In this paper, we firstly e- laborate the unique seismic observation system and its principle, then set up the geological model and adopt the ray tracing method to calculate the travel time, processing numerical simulation using the simultaneous iterative reconstruction algorithm（SIRT）. We analyze the efficiency and accuracy of algorithm and summarize their advantages and disadvantages. Finally, taking an engineering project as an example, it shows that the well--ground seis- mic method is good in solving practical engineering problems.
出处
《工程地球物理学报》
2012年第4期463-468,共6页
Chinese Journal of Engineering Geophysics
基金
江西省教育厅青年科学基金项目(编号:GJJ12391)
东华理工大学放射性地质与勘探技术国防重点学科实验室开放基金(编号:2011RGET03)资助
关键词
井地地震
层析成像
同时迭代重建
岩溶探测
ell--ground seismic
tomography
simultaneous iterative reconstruction tech-nique
karst detection
