前期对坝址区发育深部破裂位置进行纵向和横向勘探,均是点、线上的揭露,深部破裂在空间上的延展情况未切实查明,尤其对于隐蔽性较大的、出露条件不好的硐段,往往前期很难全面揭示。依平硐揭露深部破裂为基础,采用地震波CT成像技术,提出以地震波速(小于4 500m/s)、断层作为终止边界的综合辨识方法。 In the early stage, the vertical and horizontal exploration of the deep rupture sites in the dam area were both spot and line exposures, and the deep extension of the deep rupture in the space was not effectively ascertained, especially for the concealed ones with poor exposure conditions Of the tunnel, often difficult to fully reveal the early. Based on the exposing deep rupture, a seismic wave CT imaging technique is proposed, and a comprehensive identification method based on seismic wave velocity (less than 4500m / s) and fault as the termination boundary is proposed.