基于COMSOL的高压放电破碎岩石仿真研究
投稿时间:2022-01-19  修订日期:2022-05-30  点此下载全文
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作者单位邮编
马宁 北京三一智造科技有限公司 100000
金博 中国地质大学(北京) 100083
周鹏 北京三一智造科技有限公司 
钱阳 北京三一智造科技有限公司 
薛启龙 中国地质大学(北京) 100083
中文摘要:高压脉冲放电岩石破碎技术作为一种新型非机械式岩石破碎技术,在该领域具有广阔的应用前景。本文在分析高压脉冲放电破碎岩石机理的基础上,运用COMSOL Multiphusics软件,建立电-热-力多物理场耦合模型,开展花岗岩和砂岩在电压、电极间距、电解质等条件下的破碎规律仿真研究。结果表明,随着电压的增大,岩石产生的破碎区域呈线性增大;电极间距的增大导致岩石破碎区域减小;液体介质的电导率大小对放电结果的影响不大;选用多电极对放电可有效增加岩石的破碎面积。研究结果可为高压放电破碎岩石技术提供指导。
中文关键词:高压放电  岩石破碎  等离子通道  破岩机理  COMSOL
 
Simulation study of high voltage discharge crushing rock based on COMSOL
Abstract:As a new non-mechanical rock crushing technology, high voltage pulse discharge rock crushing technology has a broad application prospect in this field.In this paper, based on the analysis of the mechanism of rock crushing by high voltage pulse discharge, the software COMSOL Multiphusics was used to establish the electric-thermo-mechanical multi-physical field coupling model, and to carry out the simulation research on the crushing law of granite and sandstone under the action of voltage, electrode spacing, electrolyte and other conditions.The results show that the fracture area of rock increases linearly with the increase of voltage. The increase of electrode spacing results in the decrease of rock fragmentation area. The conductivity of liquid medium has little effect on discharge results. The fracture area of rock can be increased effectively by using multi-electrode pair discharge. The results can provide guidance for high voltage discharge rock crushing technology.
keywords:High voltage discharge  rock breaking  Plasma channel  Mechanism of rock fragmentation  COMSOL
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