Research on the Strength Prediction Model of Softened Mudstone Based on Triaxial Compressive Test of Rock

Table 2

Calculation expression of the strength criterion under different water content.

Strength criterion	Water content (%)	Evaluate expression
Mohr–Coulomb	0
	10.1
	12.5
	14.1
Hoek–Brown	0
	10.1
	12.5
	14.1
Generalized Hoek–Brown	0
	10.1
	12.5
	14.1
Bieniawski (single-parameter)	0
	10.1
	12.5
	14.1
Bieniawski (two-parameter)	0
	10.1
	12.5
	14.1
Bieniawski (three-parameter)	0
	10.1
	12.5
	14.1
Rocker	0
	10.1
	12.5
	14.1