大断面斋堂隧道爆破近区围岩损伤研究  

Blasting Damage of Large Section Tunnel to Surrounding Rock in Near Area

作　　者：王蒙 刘殿书[1] 陆欣雨 侯晓倩 WANG Meng;LIU Dianshu;LU Xinyu;HOU Xiaoqian(School of Mechanics and Civil Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)力学与土木工程学院,北京100083

出　　处：《北京理工大学学报》2024年第6期597-605,共9页Transactions of Beijing Institute of Technology

基　　金：山东省自然科学基金资助项目(ZR2020QE266);国家重点基础研究发展计划(“973”计划)资助项目(2014CB047000);国家重点研发计划资助项目(2017YFC0804607)。

摘　　要：爆破荷载作用下隧道爆破近区围岩损伤特性研究较少.以斋堂隧道为工程背景,通过现场声波测试和数值模拟的方法,研究了隧道围岩损伤效应及毫秒延期爆破中不同段炮孔对围岩损伤的影响.研究结果表明:隧道围岩损伤范围约为2.4 m,隧道围岩累积损伤由爆炸冲击损伤和爆破振动损伤两部分组成.隧道保留岩体根据损伤分布特征情况可划分为4个不同区域,即严重破坏区、强扰动区、弱扰动区和未扰动区.其中,严重破坏区和强扰动区主要受崩落孔VI和周边孔影响;弱扰动区中的“带状损伤”则是各个段位炮孔综合作用的结果.Due to lack for the rock damage characteristics of tunnel blast surroundings under blasting loads,the rock damage effect of tunnel surroundings and the influence of different position of detonator hole with millisecond delay blasting on surrounding rock damage were studied based on acoustic testing and numerical simulation methods.And the Zhaitang Tunnel was took as the engineering background to validate the methods.The results show that the damage range of tunnel surrounding rock is about 2.4 m,and the cumulative damage of tunnel surrounding rock consists of two parts:explosion impact damage and explosion vibration damage.According to the distribution characteristics of damage,the rock mass preserved in the tunnel can be divided into four different sorts,namely,severely damaged area,strongly disturbed area,weakly disturbed area,and undisturbed area.Among them,the severely damaged and strongly disturbed areas are mainly affected by the collapse hole VI and its surrounding holes.The"banded damage"in the weak disturbance zone is the result of the comprehensive action of the detonator holes in each segment.

关 键 词：大断面隧道 爆破损伤 声波测试 数值模拟 

分 类 号：TU45[建筑科学—岩土工程]