Permeability Evolution and Particle Size Distribution of Saturated Crushed Sandstone under Compression

Figure 4

The formed process of isolated pores in the specimen under the increased axial stresses.

(a) 0 MPa

(b) 2 MPa

(c) 4 MPa

(d) 8 MPa

(e) 12 MPa

(f) 16 MPa