REMOTE SENSING-ROCK MECHANICS——LAWS OF THERMAL INFRARED RADIATION AND ACOUSTIC EMISSION FROM FRICTION SLIDING INTERSECTED FAULTS AND ITS MEANINGS FOR TECTONIC EARTHQUAKE OMENS
Abstract：The friction sliding of intersected faults is the third mechanism of tectonic earthquake. By use of biaxial loading system，thermal infrared (TIR) imaging system and acoustic emission (AE) devices， the TIR radiation and AE features of three kinds of intersected faults at different intersection angle were experimentally studied in the process of bi-sheared friction sliding. It is revealed that (1) the temporal sequential features of the AE and TIR radiation in the process of loading are controlled by fault behavior，and they show staged characteristics，(2) the features of AE and TIR radiation are tightly related to the geometrical structure of the intersected faults，and the abnormal TIR spots usually occur along the chief fault in condition that the principal stress is 45°in angle to the direction of the chief fault，and (3) the features of AE and TIR radiation from vertically intersected and slanting intersected faults are different，and the higher the intersection angle is，the stronger the TIR radiation is at the location of intersection point.
