岩石加载过程中红外辐射温度场演化的定量分析方法

doi:10.13722/j.cnki.jrme.2014.0656

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摘要为探讨岩石加载过程表面红外辐射温度场演化的定量分析方法，引入分形、熵和统计学理论，提出用特征粗糙度、熵和方差作为指标定量描述岩石加载过程中红外辐射温度场的演化特征，并以含孔岩石试样加载过程热成像观测试验结果为例，对3种指标的定量刻画能力及特点进行对比分析。结果表明：(1) 3种指标都能较好地定量刻画岩石加载过程中红外辐射温度场的演化与分异特征，在岩石加载过程中随着应力变化出现阶段性变化特征，在破坏前出现红外异常前兆，且效果均好于以往使用的指标AIRT；(2) 3种指标有不同的特点，熵对于试样加载过程红外辐射的阶段性特征刻画较好，随应力增加各个阶段的红外辐射变化分界明显；而特征粗糙度和方差在临近岩石破裂时发生大幅度突然性升高，对于岩石破裂的红外前兆的识别更具优势。研究结果为岩石受力与灾变过程红外辐射的定量分析提供了新的方法。

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关键词 ：岩石力学, 红外辐射, 定量分析, 演化

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.

Key words： rock mechanics infrared radiation quantitative analysis evolution

引用本文:

刘善军1，魏嘉磊1，黄建伟1，吴立新1，张艳博2，田宝柱1，2. 岩石加载过程中红外辐射温度场演化的定量分析方法[J]. 岩石力学与工程学报, 2015, 34(s1): 2968-2976.
LIU Shanjun1，WEI Jialei1，HUANG Jianwei1，WU Lixin1，ZHANG Yanbo2，TIAN Baozhu1，2. QUANTITATIVE ANALYSIS METHODS OF INFRARED RADIATION TEMPERATURE FIELD VARIATION IN ROCK LOADING PROCESS. , 2015, 34(s1): 2968-2976.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2014.0656 或 http://www.rockmech.org/CN/Y2015/V34/Is1/2968

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