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| COMPARISON OF THERMAL INFRARED RADIATION FROM DISCONTINUOUS JOINTED FAULTS FRACTURING WITH ITS ACOUSTIC EMISSION AND STRESS FIELD |
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Abstract The stress field and acoustic emission(AE) field of two kinds of discontinuous jointed faults，en-echelon faults and collinear disconnected faults，are numerically simulated using rock failure process analysis code (RFPA2D). The thermal infrared radiation(TIR) from the loaded rock surface of modeled jointed faults is detected by a TIR imager，and the experimental boundary conditions are similar to that of numerical simulation. The detected TIR is analyzed and compared with the numerical test results of AE. It shows that the spatio-temporal characteristics of TIR radiation and AE are similar. Besides，by comparing the TIR images with the stress field and visible light photos，it is revealed that the TIR from different cracks，such as the wing crack and shear crack，present different characteristics. The physico-mechanical mechanism of the TIR abnormal and difference are discussed.
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Received: 09 December 2004
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QI Chao1, 2, 3, CHANG Jucai1, 2, YIN Zhiqiang1, 2, 3*, ZHANG Chi2, SHI Wenbao2, WANG Tuo2, WU Bowen2, FAN Lei2, WANG Hongda2. Dynamic failure characteristics and mechanism of pre-stressed anchored coal under impact load[J]. , 2026, 45(6): 1787-1805. |
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