A Drawing System for Pole Diagram and Rose Diagram of Rock Mass Structural Surface

Table 3

The geometrical parameters and distribution of the discontinuities.

Joint group	Eigenvalues	Tendency (°)	Dip (°)	Strike (°)	Bridge (m)	Trace (m)
Joint group 2	Mean	131.96	80.02	41.96	0.32	1.41
	Standard deviation	13.53	7.44	13.53	0.13	0.5
	Distribution rate	Normal distribution	Negative exponential distribution	Normal distribution	Lognormal distribution	Lognormal distribution