Abstract:

Structural homogeneity of jointed rock masses is an important problem and also is the research basics of three-dimensional fracture network modeling. A new method considering trace length of joints is suggested to zone statistical homogeneity of fratured rock mass on basis of contingency table. Through generating two compared samples, the frequency of the attributes of sample are calculated, and the Chi-square and the critical Chi-square values are determined. Then a method of structural homogeneity zoning is constructed after judging the statistical similarity among these samples.  It is proved that the result of the new structural homogeneity zoning is more reasonable and perfect.

Key words: fractured rock mass, statistical homogeneity of structure, Chi-square test, contingency table