FRACTAL CHARACTERIZATION OF ROCK MASS QUALITY

The Rock Quality Designation (RQD) is one of significant parameters used to evaluate the behaviour of engineering rock mass, which is a function of set number,amount,orientation,spacing and sampling direction of fractures. In this paper, the fracture network in real direction of the project can be obtained by computer simulating technique on the basis of stochastic models of fracture orientation, spacing and trace length distributions. So, according to statistical self-similarity of fracture spacings and blicks bounded by fractures, the empirical models regarding the relationship between RQD and fractal dimension D was respectively established using a fractal theory.