Physical principles of using measurements of infrared (IR) radiation from rock surfaces for the detection of changes in their stress state are presented. The procedure and results of studies designed to substantiate this approach are described. The load applied to a sample under conditions of uniaxial compression varies in time nearly periodically with frequencies of about 1 Hz. A specially designed instrumentation kit can record both readings of strain gages, converted to stress variations, and the related variations in the IR radiometer signal. An algorithm for the joint treatment of these records is developed. The spectral characteristics of stress variations with time, as determined from radiation and strain measurements, are in reasonable agreement; when corrected for the time delay of the IR signal, these variations are nearly identical visually. The results obtained lead to the conclusion that IR radiometry can effectively detect rapid temporal variations in the stress state of geomaterials. The potentialities of using this procedure in geophysical and geomechanical measurements are discussed.
|Original language||English (US)|
|Number of pages||7|
|Journal||Izvestiya - Physics of the Solid Earth|
|State||Published - Apr 2001|
ASJC Scopus subject areas
- Environmental Science(all)
- Earth and Planetary Sciences(all)