大当量爆炸地冲击毁伤效应的理论与试验研究Ⅱ:深埋洞室地冲击效应模拟试验系统研制  

Theoretical and experimental study on ground impact damage effect under large equivalent explosion.Part Ⅱ:Development of a simulation test system for ground impact effect of deep buried caverns

作　　者：李杰 王德荣[1] 李志浩 蒋海明 熊自明 高磊 范鹏贤 王明洋 LI Jie;WANG Derong;LI Zhihao;JIANG Haiming;XIONG Ziming;GAO Lei;FAN Pengxian;WANG Mingyang(State Key Laboratory of Explosion and Impact and Disaster Prevention and Mitigation,Army Engineering University of PLA,Nanjing,Jiangsu 210007,China;School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing,Jiangsu 210094,China)

机构地区：[1]陆军工程大学爆炸冲击防灾减灾国家重点实验室,江苏南京210007 [2]南京理工大学机械工程学院,江苏南京210094

出　　处：《岩石力学与工程学报》2022年第8期1552-1566,共15页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金重大科研仪器研制项目(51527810);国家自然科学基金面上项目(51679249)。

摘　　要：相似模拟试验是解决大当量爆炸下深埋洞室工程安全问题的重要研究手段,但长期以来受相关技术手段、设备限制,相关研究一直难以有效开展。本文采用自主研制与必要借鉴相结合的研发方式,解决了高地应力柔性均布长时加载、地冲击波形精细调控以及高地应力叠加地冲击静动组合加载等关键技术问题,研制了深埋洞室地冲击效应真三维模拟试验系统。在1∶50~1∶100几何及相应物理相似下,装置可实现高地应力加载、开挖扰动过程和爆炸地冲击效应的模拟,解决了原型试验受限,模拟手段匮乏的技术难题。采用该试验系统,对深部巷道在动静载组合作用下的响应机制进行研究,结果显示按均质岩体极限应力设计的工程安全埋深边界外,地冲击扰动可激活深埋岩体中构造岩块运动,造成工程局部严重破坏。测试结果表明,该装置运行稳定可靠,可真实再现冲击扰动下深埋洞室的毁伤过程,为深埋洞室抗大当量武器打击的安全防护研究提供了可靠的基础平台。Similar simulation test is an important research method for solving the safety problems of deeply buried caverns under high yield explosion.For a long time,however,the relevant researches have been difficult to carry out effectively due to the limitations of technical means and equipment.A three-dimensional simulation test system for ground impact effects in deeply buried caverns was developed by combining self-development and necessary borrowing,which solves the key technical problems of flexible and uniform long-time loading of high ground stress,fine adjustment of ground shock waveforms and the combined static and dynamic loading with high ground stress and ground shock.At 1∶50 to 1∶100 geometric and physical similarity,the device can realize the simulation of high ground stress loading,excavation disturbance process and explosive ground impact effect.With the equipment,the technical problems of limited prototype testing and lack of simulation means are solved.The test system was used to investigate the response mechanism of deep tunnels under combined dynamic and static loads.The results show that outside the safe burial depth boundary of the project designed according to the ultimate stress of the homogeneous rock mass,ground impact disturbance can still activate the movement of structural rock masses in the deeply buried rock mass,causing serious local damage to the construction.The test results show that the device operates stably and reliably,and can realistically reproduce the destruction process of deeply buried cavernous chambers under impact disturbance.It provides a reliable foundation platform for researches on the safety and protection of deeply buried caverns against large yield explosion impacts.

关 键 词：岩石力学 深埋洞室 地冲击 构造岩体 大当量爆炸 模拟试验 

分 类 号：TU45[建筑科学—岩土工程]