压力作用下石英砂岩的热红外光谱变化与敏感响应波段

英文篇名：Thermal Infrared Spectral Variation and Sensitive Waveband of Quartzy Sandstone under Pressure
中文刊名：光谱学与光谱分析
英文刊名：Spectroscopy and Spectral Analysis
作者：刘善军 ; 吴立新 ; 冯哲 ; 徐忠印
英文作者：LIU Shan-jun1 ; WU Li-xin1 ; 2 ; FENG Zhe1 ; XU Zhongyin1 1.College of Resources and Civil Engineering ; Northeastern University ; Sheny ang 110819 ; China 2.Academy of Disaster Reduction and Emergency Management ; Beijing Normal Univ ersity ; Beijing 100875 ; China
中文关键词：岩石 ; 应力 ; 红外光谱 ; 敏感波段 ; 灾变遥感
英文关键词：Rock ; Stress ; Infrared spectrum ; Sensitive wa veband ; Catastrophe remote sensing
出版日期：2012-01-15
机构：东北大学资源与土木工程学院;北京师范大学减灾与应急管理研究院;
年：2012
期：01
出版单位：光谱学与光谱分析

摘要

在实验室对石英砂岩进行单轴压缩加载,利用红外光谱辐射计(观测波段8～14μm)对加载过程中试样的红外光谱辐射变化特征进行观测,研究岩石红外辐射对应力响应的敏感波段。实验结果显示,当岩石被加载时,红外光谱随之发生变化,但不同波段变化特征不同,在8.0～11.5μm范围(尤其在8.6～9.1μm)石英砂岩的红外光谱辐射强度随载荷增加而增加,二者间近似呈两次曲线关系,且光谱辐射强度的"信噪比"较高;在其它波段光谱辐射强度与载荷的相关性差且"信噪比"较低。由此表明,8.0～11.5μm是石英砂岩红外辐射对应力响应的敏感波段,也是岩石应力与灾变红外遥感监测的优势波段,而最佳监测波段是8.6～9.1μm。
In the present paper the thermal infrared spectr al variation of quartz sandstone under uniaxial compression was detected by a sp ectroradiometer to study the sensitively responding waveband of infrared radiati on excited by the pressure.The experimental result shows that the infrared spec trum varies with the load,and the variation feature is different in different w avebands.The infrared radiation intensity increases with the increase in the lo ad within the waveband 8.0～11.5 μm(specially in 8.6～9.1 μm),and there is a quadratic correlation between them,meanwhile the signal-to-noise ratio o f spectrum radiation is also higher in the waveband.But in other wavebands the correlatio n is worse and the signal-to-noise is also lower.This indicates that the wave band 8.0～11.5 μm is the sensitive waveband of infrared radiation to the pres sure, and it is also the superior waveband for infrared remote sensing monitoring the stress and catastrophe of rock.The optimum waveband is 8.6～9.1 μm.

引文

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