An Improved Bingham Model and the Parameter Identification of Coal (Rock) Containing Water Based on the Fractional Calculus Theory

Figure 9

Fitting creep curves of coal (rock) with different moisture contents. (a) Fitting curve of coal (rock) with a moisture content of 0%. (b) Fitting curve of coal (rock) with a moisture content of 0.71%. (c) Fitting curve of coal (rock) with a moisture content of 1.45%. (d) Fitting curve of coal (rock) with a moisture content of 1.83%. (e) Fitting curve of coal (rock) with a moisture content of 3.67%.

(a)

(b)

(c)

(d)

(e)