Back Analysis of Geomechanical Parameters in Underground Engineering Using Artificial Bee Colony

Table 3

The ranges of identified parameters.

	Range 1	Range 2	Range 3
𝐸 (Mpa)	[2000, 12000]	[4000, 1000]	[5000, 8000]
𝑐 (Mpa)	[0.5, 7]	[1, 6]	[3, 7]
𝜑 (°)	[5, 60]	[10, 50]	[20, 40]