INFRARED THERMOGBAPHY

PrefaceChapter 1 Overview1£®1 Background1£®2 Overview of geomechanics model tests1£®3 Overview of infrared detectionChapter 2 Theoretical aspects of the infrared2£®2 Infrared spectralband2£®3 Radiometry fundamentals2£®3£®1 Radiant energy2£®3£®3 Geometrical spreading of a beam2£®3£®6 Radiant exitance2£®3£®7 Radiant intensity of a source in a given direction2£®3£®9 Radiation scattering2£®3£®8 Bouguer's law2£®4 Black bodyradiation2£®4£®3 Wien'slaw2£®4£®5 Exitance of a black body in a given spectral band2£®4£®6 Calculation of exitance of black body2£®4£®7 Thermal radiation contrast2£®5£®1 Different types of radiator2£®5£®2 Emissivity of a material2£®5£®3 Stefan-Boltzmann's law for grey body2£®5£®5 Electrically conducting materialsChapter 3 Geomechanical model test3£®1 Literature review on physical model test3£®2 Similarity theory and dimensional analysis3£®2£®2 Selection of similarity materials and ratios3£®3£®2 In situ rock properties3£®4 Geomechanical model construction3£®4£®3 Physico-mechanical parameters of the model3£®4£®4 Rock structure simulation3£®4£®5 Geomechanical model3£®5£®1 Thermography and imaging procedures3£®5£®2 Temperature calibrationChapter 4 Excavation in 600 inclined strata4£®1 Introduction4£®2 Experiment4£®2£®2 Geomechanical model construction4£®3£®1 Infrared thermography4£®3£®2 Thermal-mechanical coupling4£®4 Image processing¡­¡­ Chapter 5 Excavation in 450 strataChapter 6 Excavation in horizontal strataChapter 7 Overloaded tunnel in 450 inclined rocksChapter 8 Overloaded tunnel in horizontal strata