基于三维物理相似模拟实验的盾构巷道变形声发射特征研究  

Acoustic Emission Characteristics of Surrounding Deformation of Shield Tunnel Based on 3D Physical Similar Simulation Experiment

作　　者：范公勤[1,2] 程坤 来兴平[1,2] 温红东 FAN Gongqin;CHENG Kun;LAI Xingping;WEN Hongdong(School of Energy Resource, Xi＇ an University of Science and Technology, Xi＇ an 710054, China;Key Laboratory of Western Mines Exploition and Hazard Prevention of the Ministry of Education, Xi＇an 710054, China)

机构地区：[1]西安科技大学能源学院,陕西西安710054 [2]教育部西部矿井开采及灾害防治重点实验室,陕西西安710054

出　　处：《煤矿安全》2018年第4期50-54,共5页Safety in Coal Mines

摘　　要：以煤矿副平硐盾构施工过程中管片支护下巷道变形的声发射波形特征规律为目标,依据物理相似模拟室内实验理论,采用"声-光-电"多元指标综合测试系统监测、收集实时数据,构建了大型三维物理相似模拟实验模型,完成了盾构模拟开挖试验,并对不同开挖阶段的声发射信号数据与实时对应现象进行了量化比对分析。研究表明:管片支护下的盾构施工圆形巷道围岩稳定性强,岩体内部变形多以小事件为主,当其变形破坏的声发射信号历经"金字塔"式波动时,岩体内部可能会产生大量裂隙和较大程度的破坏。Aim at the characteristics of acoustic emission waveform of tunnel deformation under segment support during the construction of coal mine auxiliary adit shield, based on the theory of physical similarity simulation laboratory experiment, the largest scale 3D physical simulation experiment model assembly was constructed with integrated real-time monitoring system of multiple ＂acoustics-optics-electricity ＂indicators, and the experimental excavation test of the shield was completed, and the acoustic emission（AE） signal data and real time corresponding phenomena in different excavation stages were compared and analyzed quantitatively. The study results obviously indicate that shield tunnel construction under segment support has strong surrounding rock stability, and the internal deformation of rock mass is dominated by small events, and the durable damage and deformation may bring a large number of cracks and a greater degree of damage of surrounding rock when the acoustic emission signal of deformation and destruction goes through the＂pyramid＂type fluctuation.

关 键 词：盾构 三维物理相似模拟 巷道变形 声发射特征 巷道施工 

分 类 号：TD322[矿业工程—矿井建设]