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

Figure 2

Overall system structure of test: (1) coaxial transmission cable, (2) discharge electrode, (3) thick pipe connected with flange, (4) fine transfer pipe, (5) rigid three-axis pressure chamber, (6) high-pressure filling pipe end, (7)–(9) ultra-thin jack, (10) hollow jack, (11) coal sample, (12) end flange, and (13) pressure sensor.