REMOTE SENSING-ROCK MECHANICS(II) —— LAWS OF THERMAL INFRARED RADIATION FROM VISCOSITY-SLIDING OF BI-SHEARED FAULTS AND ITS MEANINGS FOR TECTONIC EARTHQUAKE OMENS
Abstract：The viscosity-sliding of bi-sheared faults is the second mechanism of tectonic earthquake. By using of biaxial loading system and thermal infrared (TIR) imaging system，the TIR radiation features of four kinds of composed faults were experimentally studied in the process of bi-sheared viscosity-sliding. It is revealed that the time-space evolution of rock surface’s TIR radiation temperature field is not only related to stress，but also to the conditions of friction surface as well as the rock properties of its both sides. The TIR radiation is stronger in the location of stress concentration and strong friction than that in the location of stress relaxation and weak friction. In condition of symmetrical rock properties and friction surface of both faults，the TIR image is double butterfly-wings shaped. In condition of rough friction surface，the time-space evaluation of TIR image is un-symmetrical and un-balanced e. g. beads-shaped，needle-shaped，suspended needle-shaped，strip-shaped，single butterfly-wings shaped or shape changed in sequence. If satellite TIR remote sensing is combined with differential INSAR technology，and the pre-sliding action and its subsequent sliding actions of active faults are taken as the monitoring focuses，it would be a prospecting new technology for the remote sensing monitoring and the short-term-time-location-magnitude forecasting for tectonic earthquake.
