Table 3 Mechanical parameter fitting functions.

From: Evolution mechanism of deformation and failure energy in composite rock mass with structural planes of different inclinations

Fit function

Parametric

  

R2

\({\varepsilon _p}=a - b\alpha\)

a

b

 

0.97

1.6625

0.0061

\({\sigma _M}=c - d\alpha +f{\alpha ^2}\)

c

d

f

0.99

31.8637

0.6028

0.0079

\({E_0}=k{e^{\frac{\alpha }{m}}}+h\)

k

m

h

0.95

0.8591

58.4203

1.6084

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