A 3D Fracture Network Model for the Undisturbed Rock Mass at the Songta Dam Site Based on Small Samples

List of symbols w Width of the sampling window h Height of the sampling window ai Dip direction of the ith joint ar Strike of the sampling window hi Dip angle of the ith joint di Fracture diameter of the ith joint Wi Weight formula for the ith joint Rfi Corrected relative frequency of the ith joint n Number of joints in a fracture set ei The ith parameter of the supposed probability density function lj The jth trace length of the measured joint of a fracture set v Sample size or number of sectors S Statistic of the Kolmogorov–Smirnov test S Critical value of the Kolmogorov–Smirnov test p Approximate significance level lm Mean trace length rm Standard deviation of the measured trace length distribution ll True mean trace length rl Standard deviation of the true trace length distribution lD Mean joint diameter rD Standard deviation of the joint diameter distribution ðCOV)m Coefficient of variation of the measured trace length distribution EðDÞ The mth moment of the joint diameter, m = 1, 2, 3... EðlÞ The mth moment of the trace length, m = 1, 2, 3... k1i Normal line density of the ith fracture set kVi Fracture density in unit volume of the ith fracture set V Volume of simulated space region

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