Relationship between development of inclined karst cave and bedrock orientation in a monoclinal structure area

In this paper, the relationship between the developmental trend of karst inclined cave and the orientation of rock formation in monoclinal structural area by constructing cave spatial distribution trend surface and rock dipping surface. Firstly, measurement initial point is regarded as original point for establishment of spatial Cartesian coordinate system according to cave exploration wire length, direction, inclination and other factors. The measurement wire is projected on the plane so that the spatial azimuth is converted to orientation angle in plane rectangular coordinate system, and the angle values are calculated. Principle of vector addition is used for calculating plane vectors and coordinates of each measured point. Relative elevation difference of each measuring point is recorded, trend surface analysis method is utilized for primary fitting, which could construct channel space distribution plane equation. Secondly, the plane equation is constructed in spatial coordinate system according to the rock orientation information. Finally, the coincidence degree of cave spatial distribution plane and rock occurrence plane is judged by calculating the angle between two plane normal vectors. Meanwhile, the trend relationship between cave spatial distribution trend surface and rock surface is judged by the angle formed by two planes and crossed line on the same level. Example analysis shows that the method is used for investigating quantitative analysis between karst cave spatial distribution and rock correlation with certain practicality and scientific value.