爆破器材2025，Vol.54Issue(4)：55-64,10.DOI:10.3969/j.issn.1001-8352.2025.04.009
小净距隧道爆破施工对邻近裂缝隧道动力响应的影响
Influences of Blasting Construction of the Small Clear Distance Tunnel on Dynamic Response of the Adjacent Lining Cracked Tunnel
摘要
Abstract
In order to study the dynamic response law of adjacent lining crack tunnels during blasting construction of small clearance tunnels,numerical simulation methods were used to study the effect of different distribution positions and depths of lining cracks in different levels of rock on blasting dynamic response.The results show that the different distribu-tion positions and depths of lining cracks in different levels of rock have no significant impact on the vibration velocity re-sponse of the lining of existing tunnels.But there is a certain impact on the stress response of the lining of existing tunnels.The impact is only near the cracks and varies with the distribution positions,sizes,and rock levels.When there are cracks in different positions of the lining of existing tunnels,there is a certain amplification effect on the tensile stress of the struc-ture.The amplification effect is most significant when there are cracks in the side walls facing the explosion.At the same position of the lining of the existing tunnel,the deeper the cracks,the greater the nearby principal tensile stress.The higher the level of the rock,the more significant the amplification effect of the principal tensile stress near the crack.When using vibration velocity as the safety control benchmark for adjacent cracked tunnels during the blasting construction process of new tunnels,the control value of vibration velocity at the crack location should be appropriately reduced,and the degree of reduction varies with the distribution position and depth of the crack.关键词
小净距隧道/爆破/改、扩建/裂缝/动力响应Key words
small clear distance tunnel/blast/reconstruction and expansion/crack/dynamic response分类
矿业与冶金引用本文复制引用
刘欢,王欢,薛育阳,曾卓,梁淦波,汪波..小净距隧道爆破施工对邻近裂缝隧道动力响应的影响[J].爆破器材,2025,54(4):55-64,10.基金项目
广东交通集团科技项目(JT2022YB26) （JT2022YB26）
