锚杆与围岩加载过程红外特征研究  

Study on Infrared Characteristics of Bolt and Rock in Condition of Loading

作　　者：籍远明[1] 

机构地区：[1]青岛科技大学数理学院,山东青岛266042

出　　处：《光谱学与光谱分析》2010年第3期659-662,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(50374069);国家重点基础研究发展计划(973计划)项目(2002CB412701)资助

摘　　要：应用红外热像技术,对锚杆与围岩加载变化破坏过程中的红外辐射现象进行了实验研究,结果表明:应力峰值前,随着荷载的增加,红外辐射温度呈现整体、均匀性升温变化,应力峰值后,在锚杆周围形成一个由多条不同等温线组成的区域,其形状是以锚杆为中心的近似圆形区域,由内向外,温度逐步降低;锚固体破坏时,存在红外辐射温度-时间曲线型和红外热像型2种形式的红外前兆特征,分别反映红外前兆的时间信息和空间信息;红外辐射温度-时间曲线的破裂前兆为降温型,而红外热像特征包括高温条带和低温条带两种类型。The infrared radiation experiments on bolt and rock in the process of loading were carried out. It was found that the infrared radiation temperatures rose wholly and uniformly before stress peak with increase in loading. The bolted rock presented local dissimilation in the thermal image after stress peak. The multi-layer round infrared radiation isothermal lines were formed around bolt. The temperature was gradually reduced from inside to outside. There were two kinds of infrared omens for bolted rock fracturing, i. e. , the infrared thermal image anomaly and curve of infrared radiation temperature and time anomaly, which reflected the spatial and temporal features of infrared omens respectively. The curve of infrared radiation temperature and time anomaly was temperature drop. The infrared thermal image omen was classified as high-temperature strip and low-temperature strip.

关 键 词：红外热像 红外前兆 锚杆 围岩 

分 类 号：P315.7[天文地球—地震学]