Mechanical Properties of Sandstone Roof and Surrounding-Rock Control of Mining Roadways Subject to Reservoir Water Disturbance

Figure 5

Typical specimen-fracture characteristics. (a) No pore pressure. (b) 0.1 MPa pore pressure. (c) 0.2 MPa pore pressure. (d) 0.4 MPa pore pressure. (e) 0.6 MPa pore pressure.

(a)

(b)

(c)

(d)

(e)