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Influences on High-Voltage Electro Pulse Boring in Granite

Author

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  • Changping Li

    (School of Automation, China University of Geosciences, Wuhan 430074, China
    School of Mechanical Engineering and Electronic Information, China University of Geosciences, Wuhan 430074, China)

  • Longchen Duan

    (Faculty of Engineering, China University of Geosciences, Wuhan 430074, China)

  • Songcheng Tan

    (Faculty of Engineering, China University of Geosciences, Wuhan 430074, China)

  • Victor Chikhotkin

    (Faculty of Engineering, China University of Geosciences, Wuhan 430074, China)

Abstract

As the exploration and drilling of oil, natural gas and geothermal wells are expanding continuously, research into high-efficiency rock drilling technology is imperative. High-voltage electro pulse boring (EPB) has the advantages of high rock breaking efficiency and good wall quality, and is a new and efficient potential method of rock breaking. The design of electrode drill bits and the selection of drilling process parameters are the main obstacles restricting the commercialization of EPB. Accordingly, it is necessary to determine the influences on high-voltage EPB. In this study, based on the equivalent circuit of high-voltage electro pulse breakdown, a mathematical model of high-voltage electro pulse discharge in rock is established. Meanwhile, a numerical simulation model of high-voltage EPB of hard granite is established based on a coaxial cylindrical electrode structure, which is often used for electrode drill bits. The simulation analysis software Comsol Multiphysics (Comsol Multiphysics ® 5.3a, COMSOL Co., Ltd., Stockholm, Sweden) is used to study the influences of granite composition, electrode spacing and electrode shape on the high-voltage EPB process. In addition, the influences of electrical parameters on high-voltage EPB are calculated according to a model of high-voltage electro pulse discharge in rock. Finally, it is demonstrated that high-voltage EPB is influenced by granite composition, electrical parameters, electrode spacing, and electrode shape, and the relationships between these factors are obtained. This study is of guiding significance for improving rock breaking efficiency, reducing energy loss, designing electrode drill bits and selecting drilling process parameters.

Suggested Citation

  • Changping Li & Longchen Duan & Songcheng Tan & Victor Chikhotkin, 2018. "Influences on High-Voltage Electro Pulse Boring in Granite," Energies, MDPI, vol. 11(9), pages 1-17, September.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:9:p:2461-:d:170199
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    References listed on IDEAS

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    1. Su Shiung Lam & Howard A. Chase, 2012. "A Review on Waste to Energy Processes Using Microwave Pyrolysis," Energies, MDPI, vol. 5(10), pages 1-24, October.
    2. Zhaolong Ge & Kai Deng & Yiyu Lu & Liang Cheng & Shaojie Zuo & Xingdi Tian, 2016. "A Novel Method for Borehole Blockage Removal and Experimental Study on a Hydraulic Self-Propelled Nozzle in Underground Coal Mines," Energies, MDPI, vol. 9(9), pages 1-13, August.
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    Cited by:

    1. Zhixiang Cai & Hui Zhang & Kerou Liu & Yufei Chen & Qing Yu, 2020. "Experimental Investigation and Mechanism Analysis on Rock Damage by High Voltage Spark Discharge in Water: Effect of Electrical Conductivity," Energies, MDPI, vol. 13(20), pages 1-16, October.
    2. Changping Li & Longchen Duan & Songcheng Tan & Victor Chikhotkin & Wenpeng Fu, 2019. "Damage Model and Numerical Experiment of High-Voltage Electro Pulse Boring in Granite," Energies, MDPI, vol. 12(4), pages 1-19, February.
    3. Changping Li & Xiaohui Wang & Longchen Duan & Bo Lei, 2022. "Study on a Discharge Circuit Prediction Model of High-Voltage Electro-Pulse Boring Based on Bayesian Fusion," Energies, MDPI, vol. 15(10), pages 1-12, May.

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