Unloading Rheological Test and Model Research of Hard Rock under Complex Conditions

Figure 12

Comparison diagram of fitting results with FOD-HKVP model and the classical Nishihara model. (a) σ₁–σ₃ = 50 MPa. (b) σ₁–σ₃ = 60 MPa. (c) σ₁–σ₃ = 70 MPa. (d) σ₁–σ₃ = 75 MPa. (e) σ₁–σ₃ = 77.5 MPa.

(a)

(b)

(c)

(d)

(e)