Mechanism and Efficiency of Combined Longitudinal-Torsional Vibration-Assisted Rock Drilling

被引：0
|
作者：
Gao D.-Y. [1 ]
Lin J.-Y. [1 ]
Tian Y.-T. [1 ]
Yao H.-L. [1 ]
机构：
[1] School of Mechanical Engineering & Automation, Northeastern University, Shenyang
来源：
Dongbei Daxue Xuebao/Journal of Northeastern University | 2024年 / 45卷 / 04期
关键词：
combined vibration; DEM (discrete element method); drilling efficiency; rock drilling; vibration assistance;
D O I：
10.12068/j.issn.1005-3026.2024.04.013
中图分类号：
学科分类号：
摘要：
In response to the limitations posed by singular longitudinal or torsional vibration-assisted rock drilling, a combined longitudinal-torsional vibration-assisted rock drilling scheme was proposed. Firstly, the theoretical model of the scheme is analyzed. Then, DEM (discrete element method) simulations using EDEM (event driven execution manager) software are conducted to simulate the drilling mechanism and effects on rocks under various conditions. Results indicate that the addition of combined longitudinal-torsional vibration assistance decreases the maximum resultant force on the drill bit by 36.45%, 9.34% and 32.84%, respectively, compared to zero vibration, longitudinal vibration, and torsional vibration schemes. Moreover, drilling speeds increase by 26.02%, 4.27% and 16.13%, respectively. Finally, experimental validation of the proposed schemeś drilling performance reveals a 35.48% reduction in the drill headś support strain and a 31.25% increase in the drilling speed when compared to solely adding torsional vibration assistance. It is demonstrated that the combined longitudinal-torsional vibration -assisted method can significantly enhance the efficiency of rock drilling. © 2024 Northeast University. All rights reserved.
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页码：555 / 563
页数：8
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