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。Loading

标    签 红外热像 红外前兆 锚杆 围岩 Infrared thermal image Infrared omen Bolt Rock
 

The infrared radiation experiments on bolt and rock in the process ofloading were carried out. It was found that the infrared radiation temperaturesrose wholly and uniformly before stress peak with increase in loading. The boltedrock presented local dissimilation in the thermal image after stress peak. Themulti-layer round infrared radiation isothermal lines were formed around bolt.The temperature was gradually reduced from inside to outside. There were twokinds of infrared omens for bolted rock fracturing, i.e., the infrared thermalimage anomaly and curve of infrared radiation temperature and time anomaly, whichreflected the spatial and temporal features of infrared omens respectively. Thecurve 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.(2002CB412701)资助

中图分类号 TO434.3
 
      

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基金项目 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

收稿日期 2009-4-22

修改稿日期 2009-7-26




引用该论文 JI Yuan-ming. Study on Infrared Characteristics of Bolt and Rock in Condition of[J]. 光谱学与光谱分析, 2010, 30(3): 659～662 (in chinese)
籍远明. 锚杆与围岩加载过程红外特征研究[J]. 光谱学与光谱分析, 2010, 30(3): 659～662 【1】Luong M P. Infrared Thermography of Fracture of Concrete and Rock.
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