Abstract
Block stability analysis is important for studying the overall stability of surrounding rock in slope engineering. The main problem in regards to block stability analyses is determining the relative positional relationship between the structural plane and the free face. Consequently, studying the structural plane and free face is of great significance in engineering. By using the steep rocky slope of Shenxianju in Xianju County, Zhejiang Province as an example, this paper proposes new methods for determining the structural plane and free face using the coordinate projection method through an unmanned aerial vehicle. In addition, using MATLAB, the authors developed a CPG programme suitable for rock slope engineering and established a three-dimensional (3D) model of the slope allowing the visualisation of the structural plane, free face and slope characteristics. This practical engineering application demonstrates that this method is reliable and that the CPG programme is feasible. Overall, this study provides new technical means for landslide prediction and prevention and proposes an effective solution for efficient and safe operation in such instances.
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