Demarcation of Structural Domains in Fractured Rock Masses Using a Three-Parameter Simultaneous Analysis Method

Table 3

Parameters of the distribution functions used for the simulated fracture populations.

Population	BVND (orientation)		NORMD (trace length)		LOGD (aperture)		Number of fractures
	Mean (°)	Variance (dip dir., dip)	Mean (m)	Variance	Mean (mm)	Variance
Data 1	180∠55^1	4000, 350	3.5^1	1.5	3^1	400	200
Data 2	180∠55^2	4000, 350	3.5^2	1.5	3^2	400	200
Data 2-R4	180∠55^2	4000, 350	3.5^2-R4	1.5	3^2	400	200
Data 2-R5	180∠55^2	4000, 350	3.5^2	1.5	3^2-R5	400	200
Data 3	240∠45^1	4000, 350	3.5^2	1.5	3^2	400	200
Data 4	180∠55^2	4000, 350	2.0^1	1.5	3^2	400	200
Data 5	180∠55^2	4000, 350	3.5^2	1.5	10^1	400	200

180∠55^{1 (or2)}: the mean orientation of a population generated by BVND in the first (or second) time. The column vectors of a fracture parameter in two populations will be same if they are generated through the same mean in the same time (e.g., the orientation column vector of data 2 equals to the orientation column vector of data 4). 3.5^2-R4: the trace length column vector of data 2-R4 is rearranged from the trace length column vector of data 2. 3^2-R5: the aperture column vector of data 2-R5 is rearranged from the aperture column vector of data 2.