Determination of the moments and rate of change in the stress state of grounds from variation in infrared radiation flux from the surface

Results of studies in which measurements of infrared radiation from the surface of geomaterials were used to obtain information on variation in their mechanical state are reported. Physical principals of the approach are briefly described. Instrumentation and a technique are designed to obtain synchronous records of pulsed variations in load on a ground sample subjected to compressive contraction and corresponding variations in the flux from its surface. An algorithm of coprocessing of the records obtained is constructed. It is shown that data of thermal-radiation measurements can be used to advantage to detect moments at which the stress state of grounds changes and to estimate relative magnitudes of these changes.