Method for predicting plasma channel length for rock breaking by pulsed discharge

Liu Yi; Liao Hongbin; Cheng Jin; Li Liuxia; Lin Fuchang; Zhao Yong

doi:10.11884/HPLPB202436.230432

Volume 36 Issue 5

Apr. 2024

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Article Navigation > High Power Laser and Particle Beams > 2024 > 36(5): 055021

Liu Yi, Liao Hongbin, Cheng Jin, et al. Method for predicting plasma channel length for rock breaking by pulsed discharge[J]. High Power Laser and Particle Beams, 2024, 36: 055021. doi: 10.11884/HPLPB202436.230432

Citation:

Liu Yi, Liao Hongbin, Cheng Jin, et al. Method for predicting plasma channel length for rock breaking by pulsed discharge[J]. High Power Laser and Particle Beams, 2024, 36: 055021. doi: 10.11884/HPLPB202436.230432

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Method for predicting plasma channel length for rock breaking by pulsed discharge

doi: 10.11884/HPLPB202436.230432

Liu Yi^{1, 2
,},
Liao Hongbin¹,
Cheng Jin³,
Li Liuxia^{1, 2},
Lin Fuchang^{1, 2},
Zhao Yong¹

1.
State Key Laboratory of Advanced Electromagnetic Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
2.
Key Laboratory of Pulsed Power Technology of Ministry of Education, Huazhong University of Science and Technology, Wuhan 430074, China
3.
CNPC Engineering Technology R&D Company Limited, Beijing 102206, China

Received Date: 2023-12-07
Accepted Date: 2024-02-23
Rev Recd Date: 2024-02-19

Available Online: 2024-02-29

Publish Date: 2024-05-15

Abstract

Abstract

Aiming at the difficulty of predicting the length of rock-breaking arc plasma channel by high voltage pulse discharge, a comprehensive test platform for rock-breaking arc plasma channel by high voltage pulse discharge was constructed. The development characteristics and typical current and voltage parameters of arc plasma channel under granite-tap water combined medium were measured, and the broken region formed on the rock surface under different electrode spacing and pulse discharge times was extracted. Based on the energy balance equation, the impedance model of the arc plasma channel in rock is established. The approximate optimal solution of the impedance model parameters is obtained by iterative optimization algorithm. The relative error between the calculated results and the experimental results is less than 7%. Based on the optimized parameters, the length of plasma channel is predicted by the measured current and voltage data. The absolute error between the plasma channel length predicted by the model and the measured value is in the order of mm, and the relative error is less than 10%, which provides theoretical support for the matching design of power-electrode load in the high-voltage pulse discharge rock breaking system.
- pulse discharge,
- high voltage pulse discharge rock breaking,
- arc plasma,
- plasma channel length prediction

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References(22)

References

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