论文部分内容阅读
利用煤岩破坏声电热效应多参量实验系统,测试研究了岩样变形破坏过程中声发射、表面电位和红外辐射的变化规律及特征.结果表明:岩样破坏的红外辐射异常信号出现在温度曲线的极大值或极小值点,并且和声电异常信号有一定的对应关系,但不完全同步.岩样受载过程中红外辐射温度曲线呈现典型的降转升型;试样破坏时,岩样平均红外辐射温度增量为0.1~0.3℃,最高红外辐射温度增量为1.07~2.09℃;由声发射、表面电位和红外辐射测试结果反映出的试样损伤前兆点对应的载荷比范围分别为23.0%~52.6%,26.8%~56.2%和36.9%~49.2%,反映出的临界前兆点对应的载荷比范围分别为73.5%~88.7%,77.0%~94.8%和73.6%~95.8%.
By using the multi-parameter experimental system of acoustic and thermal effects of coal and rock destruction, the variation rules and characteristics of acoustic emission, surface potential and infrared radiation in the process of deformation and failure of rock samples were studied. The results show that the infrared radiation anomalous signal of rock failure appears in the temperature curve And it has some correspondence with the acoustic anomaly signal, but it is not completely synchronous.The curve of infrared radiation temperature during the loading process of rock specimen shows a typical decrease and rise.When the sample is damaged, The average temperature increment of rock specimen was 0.1-0.3 ℃ and the maximum temperature of infrared radiation was 1.07-2.09 ℃. The range of load ratio corresponding to the precursor damage point reflected by acoustic emission, surface potential and infrared radiation test Respectively, from 23.0% to 52.6%, from 26.8% to 56.2% and from 36.9% to 49.2%, respectively. The corresponding load ratios ranged from 73.5% to 88.7%, from 77.0% to 94.8% and from 73.6% to 95.8% .