To investigate influence factors of hard rock fragmentation, numerical simulation and experimental research of hard rock breaking by high voltage pulse discharge are examined by two parameters: electrode gap and hard rock type. Using the three-dimensional electromagnetic simulation software Computer Simulation Technology, the electric field distribution of the electrode and variation of motion trajectory of discharge particles within the hard rock are simulated. Breaking hard rocks by high voltage pulse discharge experiments are carried out to observe the breakage effect of hard rock and the waveforms of output voltage and current. The results show that the fragmentation effect of hard rock is strongly dependent on the electrode gap and rock type, and experimental results are consistent with the simulations. The above conclusions provide appropriate conditions for the subsequent application of high voltage pulse discharge in hard rock fragmentation.

为了研究硬岩破碎的影响因素，通过电极间隙和硬岩类型这两个参数对高压脉冲放电破碎硬岩的数值模拟和实验研究进行了研究。使用三维电磁仿真软件“计算机仿真技术”，可以模拟电极的电场分布以及硬岩中放电粒子的运动轨迹变化。进行了高压脉冲放电破碎坚硬岩石的实验，观察了坚硬岩石的破碎效果以及输出电压和电流的波形。结果表明，坚硬岩石的破碎效果与电极间隙和岩石类型密切相关，实验结果与模拟结果吻合。