The Study About Characteristics And Activity Of The Faults In Dagang-Mauntain Shimian County

There had grown a lots of faults in the granite in the dam area of the Dadu river Dagang Mauntain hydroelectric power station being planed to build. And the faults have great influence to the engineering stability of the dam. Basing on the acquaintance of the stratum, the rock, the structural setting, the tectonic framework and the research in the stratum, the rock and the structure of dam area in detail, using the modern principle of tectonic analysis, this paper analyzes the geometry characteristics, the deformation, the dynamics characteristics, kinematics characteristics of the dislocation interfaces. Further more this paper discuss' the activity of the faults.The study showed that the diabase vein controlled the development and distribution of the faults which scale was small, the dominant dip was west, and the dip angle was medium to steep. The style of the faults was brittleness in the dam area.The fact that the faults in study area didn't have activity was proved thought the study about topographical features, quartz pattern and hot water movement. The quartz pattern study showed that the activity age was early Pleistocene epoch—late Pliocene.The finite element analogue indicated the expression orientation of maximal stress axis was east— west, and the value was 50Mpa; the expression orientation of minimal stress axis was south—north, and the value was 10Mpa...