Study on the Damage Model of Coal Rock Caused by Hydraulic Pressure and Electrical Impulse in Borehole

Figure 7

Data processing diagram at 3 MPa hydrostatic pressure and different voltages.

(a) 7 kV CT image

(b) 7 kV binary image

(c) 9 kV CT image

(d) 9 kV binary image

(e) 11 kV CT image

(f) 11 kV binary image

(g) 13 kV CT image

(h) 13 kV binary image