This invention provides a method for segmenting rock
mass structural surfaces in a three-dimensional
mesh model of the tunnel face, relating to the fields of three-dimensional
laser point cloud processing and tunnel
geotechnical engineering. The method involves collecting multimodal
sensing data of the tunnel face during excavation, generating a
colored three-dimensional
mesh model based on this data, and performing
tensor quantization on the
colored three-dimensional
mesh model data. Each vertex of the three-dimensional mesh model is encoded as a normal vector
tensor, and the saliency of the vertices is determined based on the tensors to extract the vertex data of the structural surfaces. The structural surface vertices are then clustered, and structural surfaces are extracted from the obtained clustered vertices. Based on the orientation of the structural surfaces, they are grouped, and rock
mass parameters are calculated. This invention solves the technical problems in existing technologies where structural surface rock
mass segmentation easily leads to over-segmentation or under-segmentation, and where manual geological sketching is inefficient and inaccurate.