Estimation of Rock Burst Grades Using Rock Mass Strength

Table 13

Estimation results of rock mass strength.

Hoek et al. [24]		Barton [29]		Singh [30]		Kalamaras and Bieniawski [31]
Formula	σcm (MPa)	Formula	σcm (MPa)	Formula	σcm (MPa)	Formula	σcm (MPa)
	2.42		4.75		8.98		2.39