水中丝爆等离子体破岩机理研究
投稿时间:2019-05-16  修订日期:2019-05-16  点此下载全文
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作者单位E-mail
马瑞 北京市政路桥股份有限公司 xql@cugb.edu.cn 
周世生 北京市政路桥股份有限公司  
胡燕川 北京市政路桥股份有限公司  
孙西濛 北京市政路桥股份有限公司  
刘宝林 中国地质大学(北京)  
薛启龙 中国地质大学(北京) xql@cugb.edu.cn 
曲骏 中国地质大学(北京)  
中文摘要:针对传统碎岩技术的局限性,研究了一种利用水中丝爆等离子体破碎岩石的新技术。介绍了利用水中丝爆产生等离子体破碎岩石的机理研究和现场实验研究。分析了高电压脉冲放电过程中的铜丝变化过程,建立了铜丝在各阶段变化的电阻模型,利用MATLAB软件提供的数值算法,对不同阶段放电电路的电流进行理论数值计算,并与实验得到的电流波形进行对比。研究发现,电流波形,上升沿时间越短,脉冲放电效果越好。铜丝变化产生等离子体的过程中,等离子体通道具有一定的电阻性。实验数据结果与模型数值计算结果相符,该电阻模型一定程度上能够用来理论解释铜丝在脉冲放电过程放电通道变化特性。
中文关键词:丝爆,高压脉冲放电,等离子体,破碎岩石,放电模型
 
Study on rock breaking mechanism of silk explosion plasma in water
Abstract:In view of the limitations of traditional crushing technology, a new technique for breaking rock by using wire explosion plasma in water was studied. The mechanism research and field experimental research on the use of plasma generated by wire explosion in water to break rock is introduced. The change process of copper wire in high voltage pulse discharge process is analyzed, and the resistance model of copper wire changes at various stages is established. The numerical algorithm provided by MATLAB software is used to calculate the current of the discharge circuit in different stages, and the experiment is obtained. The current waveforms are compared. The study found that the current waveform, the shorter the rising edge time, the better the pulse discharge effect. During the process of generating a plasma by a copper wire, the plasma channel has a certain electrical resistance. The experimental data results are consistent with the numerical calculation results of the model. The resistance model can be used to theoretically explain the variation characteristics of the discharge channel of the copper wire during the pulse discharge process.
keywords:Wire explosion, high voltage pulse discharge, plasma, broken rock, discharge model
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