Stability of a highly-jointed cut destructed slope in Guangdong province is analyzed with stereographic projection method in the paper based on detailed geological investigation.

Based on the intensive field investigation of the thirteen slopes higher than fifty meters,rosette plot and stereographic projection are used to analyze joints distribution and stability evaluation.

We use K to analyze the probability of occurrence of sliding friction circle,and demonstrates it in the structural plane stereographic projection.

Based on a thorough study of the geological survey data about the rock mass in project area,the key blocks were searched by stereo-projection method of block theory,and the geo.

For the large crossing section of the spillway and diversion tunnels,equatorial projection method is used to analyze the stability of wedge body formed by the combination of different occurrence and fissure surface.

Analysis of gallery damage by using hemispherical projection method;