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

Figure 2

Relation curves between porosity of fragmentized coals and time under the stress of 8 MPa. (a) m1. (b) m2. (c) m3. (d) m4. (e) m5.

(a)

(b)

(c)

(d)

(e)