STUDY ON APPLICATION OF HDRM TO CLASSIFICATION OF TOPPL-ING DEFORMATION

Toppling deformation has obvious characteristics of partition and is common in rock slopes of one hydropower. The quantitative classification of toppling deformation degree with geophysical properties is infrequent. Based on the discrepancy of resistivity driving by different degrees of deformation, this paper classifies the degree of toppling deformation of the slopes at the right abutment of Miaowei hydropower station with the HDRM(High-Density Resistivity Method).To remove the influence of the ground resistivity caused by the rock itself, this paper gets the law of ground resistivity distribution through forward simulation of a 2D model. Then it gets properties a related with the degree of toppling deformation by dividing the metrical resistivity with ground resistivity. Finally, comparing with the geological survey method, this method has improved the reliability and accuracy. It can quantify the toppling deformation classification successfully.