dam ›› 2014, Vol. 0 ›› Issue (1): 57-.

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Fine detection of Karst structure by seismic CT technology

CAI Lian-chu and MIAO Nian-you   

  • Received:2013-08-01 Online:2014-03-01 Published:2014-03-01

利用地震波CT 技术精细化探测隧洞间岩溶构造

蔡连初,缪念有   

  1. 1.浙江华东工程安全技术有限公司,浙江 杭州,310014;2.华东勘测设计研究院有限公司,浙江 杭州,310014)
  • 作者简介:蔡连初(1969- ),男,汉族,湖南湘潭人,高级工程师,长期从事工程地质勘探和地质超前预报工作。

Abstract: The seismic CT detecting technology is mainly used in two-dimensional space. To find out the Karst structure in the surrounding rock between the tunnels at a hydropower project, sets of crossing seismic CT detecting section were arranged and 2-d seismic CT technology was applied to detect the spatial distribution of wave velocity in the surrounding rock between the tunnels. Followed, a special drawing software rendering 3-d contour surface of wave velocity was adopted to form a 3-d materialized view. By analysis of the spatial distribution of low wave velocity, the Karst structure can be obtained.

Key words: seismic CT, Karst structure, 3-D fine detection

摘要: 地震波CT技术主要用于二维空间探测,为查明某水电工程隧洞间围岩的溶蚀构造,布置多组交叉地震波CT探测剖面,利用二维地震波CT技术反演得到隧洞间围岩波速的空间分布,然后用专门的绘图软件绘制三维波速等值面并形成三维实体图形。根据三维实体图形中低波速围岩的空间分布,分析判断溶蚀构造的形态,从而实现对岩溶构造的精细化探测。

关键词: 地震波CT, 岩溶构造, 三维精细探测