DETERMINING THREE-DIMENSIONAL CONNECTIVITY OF ROCK MASS DISCONTINUITY BY PROJECTION

Three-dimensional connectivity of rock mass fractures is an important parameter which has the connotation of evaluating rock mass stability. It has the meaning of hydro-rock mechanics which is totally different from the meaning of connectivity related to the hydrogeology. Because of the randomness of fractures in rock mass,it is very difficult to obtain the three-dimensional connectivity of rock mass fractures by general method. A new method to obtain the three-dimensional connectivity of rock mass fractures is described based on the in-situ engineering rock mass fractures of three-dimensional network numerical modeling to obtain the three-dimensional connectivity in special dip direction and key section of engineering rock mass by ideal section plane projection. A computer programming is written by authors to realize the calculation;and its result is directly applied to practical engineering.