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| QUANTITATIVE ANALYSIS METHODS OF INFRARED RADIATION TEMPERATURE FIELD VARIATION IN ROCK LOADING PROCESS |
| LIU Shanjun1，WEI Jialei1，HUANG Jianwei1，WU Lixin1，ZHANG Yanbo2，TIAN Baozhu1，2 |
(1. College of Resources and Civil Engineering，Northeastern University，Shenyang，Liaoning 110819，China；
2. College of Mining Engineering，Hebei United University，Tangshan，Hebei 063000，China) |
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Abstract Aiming to explore the quantitative approaches on the infrared radiation temperature field evolution of rock in loading process，the factual theory，entropy theory and statistical method were employed. Three indices including characteristic roughness，entropy and variance were introduced to describe the evolution of infrared radiation temperature field in the loading process of rock. The properties and potential description of three indicators were comparatively analyzed and discussed in terms of the thermal imaging observation experiment of several hole-rock samples in loading process. The results show that：(1) Three indices can quantitatively describe the evolution and differentiation characteristics of infrared radiation temperature field in loading process of rock effectively. The indices respond variously with stress changes of rock and display anomalous IR precursor before rock failure. Additionally，the effect of quantitative expression is better than previous index AIRT. (2) There are different features for three indices. The entropy is better to describe the stage characteristics of infrared radiation in loading process of rock，and the boundary of infrared radiation changing at different stages with the increase of stress is more obvious. Meanwhile，the characteristic roughness and variance increase greatly before the rock failure and have more advantages to identify the infrared precursor of rock failure. This study would provide new way for quantitative analyzing the infrared radiation in rock loading process.
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2015, Vol. 34 
