Study on the Porosity of Saturated Fragmentized Coals during Creep Process and Constitutive Relation

Figure 1

Classification of particle size: (a) 20.0∼25.0 mm. (b) 15.0∼20.0 mm. (c) 10.0∼15.0 mm. (d) 5.0∼10.0 mm. (e) 2.5∼5.0 mm.

(a)

(b)

(c)

(d)

(e)