肖一标,段隆臣,李昌平,康积锋,李傲

• 1:中国三峡建工(集团)有限公司
• 2:中国地质大学(武汉)工程学院
• 3:中国地质大学(武汉)机械与电子信息学院
• 4:中国地质大学(武汉)岩土钻掘与防护教育部工程研究中心

摘要(Abstract)：

高压电脉冲破岩钻进是目前比较具有潜力和接近工业化的一种新型破岩钻进方式。已有的基于PFC2D的高压电脉冲破岩损伤模型未对破岩试验所用的岩石进行参数标定，无法保证模拟的模型与实际破岩试验的岩石力学性质一致。基于室内单轴压缩和巴西劈裂试验的数据结果对天然岩石进行了参数标定，通过标定所得的微观参数建立了与高压电脉冲破岩试验尺寸一致的几何模型，并对高压电脉冲破岩过程进行了仿真研究。仿真结果表明高压电脉冲破岩过程中，以产生剪切破坏为主，同时伴随着一定数量的拉张破坏。之后，利用高压电脉冲破岩试验系统进行了电脉冲破岩试验，得到了直径60 mm、深度22.5 mm的不规则破碎孔，并通过点云软件将破碎效果可视化，放电破岩试验的结果验证了标定所得参数的有效性。最后，通过标定参数建立的几何模型研究了裂隙对高压电脉冲破岩效果的影响，结果表明裂隙的存在会降低破岩过程中的能量消耗，且破碎过程中的破碎区域有向裂隙方向发展的趋势。

关键词(KeyWords)： 高压;电脉冲破岩;破岩过程;PFC数值模拟;破岩试验

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目（42272366）;; 岩土钻掘与防护教育部工程研究中心开放研究基金项目（202206）;; 油气钻采工程湖北省重点实验室开放基金资助项目（YQZC202207）

作者(Author): 肖一标,段隆臣,李昌平,康积锋,李傲

DOI: 10.19509/j.cnki.dzkq.tb20210625

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