文献类型：期刊文献

英文题名：Experimental and Numerical Simulation Investigation on Rock Breaking for Granite with Laser Irradiation

作者：Lu, Yiqiang Chen, Cancan He, Fei Yu, Qingzeng Wang, Mingyao Si, Liang

第一作者：Lu, Yiqiang

通信作者：Chen, CC[1]

机构：[1]Zhengzhou Univ, State Key Lab Tunnel Boring Machine & Intelligent, Zhengzhou 450001, Peoples R China;[2]China Railway Engn Equipment Grp Co Ltd, Zhengzhou 450016, Peoples R China;[3]Guizhou Inst Technol, Sch Mech Engn, Guiyang 550008, Peoples R China;[4]Zhengzhou Univ, Zhongyuan Crit Met Lab, Zhengzhou, Peoples R China

第一机构：Zhengzhou Univ, State Key Lab Tunnel Boring Machine & Intelligent, Zhengzhou 450001, Peoples R China

通信机构：corresponding author), Zhengzhou Univ, State Key Lab Tunnel Boring Machine & Intelligent, Zhengzhou 450001, Peoples R China.

年份：2025

卷号：58

期号：2

起止页码：1861-1877

外文期刊名：ROCK MECHANICS AND ROCK ENGINEERING

收录：;EI(收录号：20244817414973);WOS:【SCI-EXPANDED(收录号:WOS:001360231600001)】；

基金：The research presented in this manuscript was supported by the Science and Technology Foundation of Guizhou Province (QKHJC-ZK[2024]YB514), and the National Natural Science Foundation of China (52304099, 52304301).

语种：英文

外文关键词：Tunnel boring machine (TBM); Laser irradiation; Rock breaking; Thermodynamic coupling rock breaking; Kerf depth

摘要：To investigate the efficacy of laser as an auxiliary rock breaking technology and its compatibility with TBM (tunnel boring machine) tools, we conducted three experimental series with different laser power levels and scorching durations. Static tests showed that higher laser power led to greater rock-breaking depth. The relationship between laser power and kerf depth was linear for short irradiation times but followed a logarithmic trend for longer times. However, laser assisted by high-pressure gas blowing rock breaking showed a consistent linear increase in depth with rising laser power. Mobile laser rock breaking tests demonstrated decreased kerf depth with increased movement speed. Numerical simulations using a thermal-mechanical coupling model confirmed that longer laser scorching times led to more extensive internal cracks in rocks, primarily shear cracks, and reduced the force needed for hob rock breaking. This research suggested the feasibility of laser technology as a complement to TBM hobs for rock breaking. This study investigated the effects of laser power, irradiation time, high-pressure gas blowing and laser movement speed on laser irradiation breaking graniteBlowing high-pressure gas-assisted laser irradiation rock can improve kerf depth markedly.Laser irradiation rock induced mainly shear cracks and a minority of tensile cracks.Hob rock breaking simulation suggested that 5-10 s laser irradiation is optimal.