Investigation on Large-Scale Tests of Rock Fracturing by High-Voltage Electric Pulse with Voltage as a Variable

In this paper, we use an independently developed high-voltageelectricalpulse (HVEP) system to implement fracturing of solid rocks. The dischargecapacitance was 150 mu F, and the voltage was increased from 8to 14 kV to increase the discharge energy. The rock appears crackedat 14 kV and 150 mu F. The parameters current, strain, and vibrationare utilized to investigate the rock-breaking pattern of HVEP. Anincrease in voltage can generate a heightened destructive effect.The enhanced effects are reflected in the peaks of current, strain,and vibration. Cracks result in an acceleration of the rate of decayof the vibration curve. Also, the rate of variation of the peak strainraises. According to the spectrum analysis, HVEPs primarily generatelow-frequency energy to crack rocks in the 0 to 2000 Hz range.