山东大学学报 (工学版) ›› 2024, Vol. 54 ›› Issue (6): 72-81.doi: 10.6040/j.issn.1672-3961.0.2023.196
• 土木工程 • 上一篇
胡瑶瑶1,徐彬2,3,马川义1,黄新杰2,4,张波4,李彪2,4*
HU Yaoyao1, XU Bin2,3, MA Chuanyi1, HUANG Xinjie2,4, ZHANG Bo4, LI Biao2,4*
摘要： 为探究激光参数对破岩效果的影响,开展激光辐照岩石穿孔效应研究。借助MATLAB软件获取熔蚀坑孔洞周围热裂纹宏观拓展形貌,揭示激光破岩参数对岩石热裂解特性影响。分析激光耗能与熔蚀坑孔洞体积间的定量关系,阐明激光参数对穿孔比能、切口比能和钻进速度的影响规律。结果表明:激光辐照岩石过程中首先在辐照点周围生成熔蚀坑孔洞,随后孔洞周围的热致微裂纹扩展发育形成辐射性宏观热裂纹;随着激光功率和辐照时间的增加,岩石热裂纹累积总面积及累积总长度增加,熔蚀坑孔洞体积也逐渐增大;兼顾熔蚀坑孔洞体积、宏观热裂纹形成条件以及破岩效能,建议激光功率不小于4 kW,同时辐照时间不超过5 s。
中图分类号:
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