Selection of Optimal Threshold of Generalised Rock Quality Designation Based on Modified Blockiness Index

Table 9

Joint data of the dam rock mass.

Joint set no.	Joint number	Joint orientation			Trace length		d3 (m^−3)
		Dip direction (°)	Dip angle (°)	Fisher’s coefficient κ	Distribution type	Average trace length
1	20	75	64	7.38	Lognormal	10	0.024
2	10	5	85	5.95	Lognormal	7	0.012
3	20	33	49	5.73	Lognormal	7	0.025