The plasma path development model (PPDM) in rocks during rock breaking by high-voltage pulse discharge

被引：6

作者：

Zhao, Yong ^{[1
,2
,3
]}

Liu, Yi ^{[1
,2
,3
]}

Xu, Youlai ^{[1
,2
,3
]}

Wang, Tianyu ^{[1
,2
,3
]}

Liu, Siwei ^{[4
]}

Lin, Fuchang ^{[1
,2
,3
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Elect & Elect Engn, Wuhan 430074, Hubei, Peoples R China

[2] Huazhong Univ Sci &Technol, State Key Lab Adv Electromagnet Engn & Technol, Wuhan 430074, Hubei, Peoples R China

[3] Huazhong Univ Sci & Technol, Key Lab Pulsed Power Technol, Minist Educ, Wuhan 430074, Hubei, Peoples R China

[4] Tohoku Univ, Inst Fluid Sci, 2-1-1,Katahira,Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

CURRENT APPLIED PHYSICS | 2024年 / 59卷

基金：

中国国家自然科学基金;

关键词：

Plasma path; Discrete element method; Finite element method; Inhomogeneous dielectric; Segmental breakdown criterion; ELECTRICAL BREAKDOWN; LIBERATION;

D O I：

10.1016/j.cap.2024.01.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High-voltage pulse discharge rock-breaking technology (high-voltage pulse discharge rock-breaking technology, HPDT) is widely used in the energy mining industry. In HPDT, in order to analyze the path distribution characteristics of plasma, based on the homogeneous dielectric breakdown theory, the segmental breakdown criterion for the plasma path is proposed. The plasma path development model (plasma path development model, PPDM) is established with the help of the discrete element method, finite element method, and numerical calculation method. For a typical granite-liquid combination, the development process and distribution characteristics of the plasma path inside the rock are calculated for different distances between electrodes. The results show that the fracture of rock is the result of air gap breakdown. Finally, the accuracy of the model is analyzed and the method to reduce the error is given. This work lays a foundation for quantifying the crushing efficiency of HPDT and improving its application range.

引用

页码：136 / 152

页数：17

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