Enhancing Dangerous Rock Mass Identification in Bare Rock Mountainous Areas Using Oblique Photography

Large-scale key projects such as pumped storage, wind farm or infrastructure projects are gradually increasing in the higher altitudes bare rock mountainous areas in China due to the national strategy. The high-level dangerous rock mass widely distributed in these areas poses a great threat to engineering construction due to its huge-scale and concealment. However, the traditional geological survey method is difficult to obtain the complete feature information of dangerous rock mass efficiently and accurately. Therefore, we optimized the data acquisition parameters of the oblique photography of dangerous rock mass in this special geological environment, and formed a set of targeted data acquisition ideas. Then, based on the oblique photography model, the interpretation signs of dangerous rock mass are established, and a set of identification and classification theory is summarized. Using point cloud data, the automatic identification technology of dangerous rock mass structural plane is further studied. At the same time, the research also carried out the application practice based on the actual pumped storage project, and verified the effectiveness and accuracy of the proposed method.This study showed that oblique photography is a promising method for improving high-level dangerous rock mass identification efficiency in bare rock mountainous areas.