Method for establishing geostress field distribution of slopes in a canyon area

A method for establishing a geostress field distribution of slopes in a canyon area, comprising:

• acquiring a structural plane trace length, a rock bridge length, an occurrence, and a character of a fracture surface, and obtaining a persistence ratio of the fracture surface based on the structural plane trace length and the rock bridge length;
• obtaining, based on a correspondence of persistence ratios of fracture surface with preset fracture stages of crack, a fracture stage of a crack corresponding to the persistence ratio of the fracture surface;
• obtaining a magnitude of a maximum principal stress of the crack based on the fracture stage and the character, and obtaining a direction of the maximum principal stress of the crack based on the occurrence;
• establishing the geostress field distribution of the slopes in the canyon area based on the magnitude of the maximum principal stress and the direction of the maximum principal stress;
• and
• applying the geostress field distribution of the slopes in the canyon area in engineering site selection and engineering rock mass stability determination;
• wherein the character comprises a property and a weathering degree of a rock;
• wherein obtaining the magnitude of the maximum principal stress comprises:
• obtaining a peak strength of the rock based on the property and the weathering degree of the rock;
• and
• obtaining the magnitude of the maximum principal stress based on the peak strength and the fracture stage.