Estimation Research of Rock Deformation Parameters of Badong Group in Three Gorges Reservoir Area with Fractal Box-Dimension

摘要

The deformation module of rock man is one of the important indexes for evaluating the mechanical properties of rock mass, and plays an important role on engineering construction. However, it is difficult to select accurate value of deformation module due to the nonhomogenelty and complexity of rock mass. The objective of this paper is to study the relationship among the fractal dimension, the damage variable and the deformation parameters of rock mass, and apply fractal box-dimension method to evaluate the deformation parameters of two groups of rock mass of Badong Group in Three Gorges Reservoir area. Based on the mechanic tests data and the study of related evaluation methods, the artificial neural network method with high prediction accuracy was used to check the calculation result The results indicate that this method is a new and effective approach to evaluate the mechanic parameters of rock mass, and can be used widely in geotechnical engineering.