论文部分内容阅读
为探讨不同冲击倾向性煤体失稳破坏的红外前兆信息,以无、弱、强3种冲击倾向性矿井煤样为对象,开展煤体加载破坏过程中红外辐射特征观测试验。试验结果表明:无冲击倾向性煤体温度场变化幅度较小,表面平均温度变化在0.01℃内,弱冲击倾向性煤体表面平均温度升高达0.18℃,强冲击倾向性煤体表面平均温度升高达0.21℃;无冲击倾向性煤体加载过程无明显高温区域,而冲击倾向性煤体加载时则出现剪切破坏形成的高温区域,且冲击倾向性越强,区域范围和强度越大;冲击倾向性煤体破坏前,煤样表面破裂区域为升温变化前兆,而未破裂区域为降温变化前兆。
In order to explore infrared precursory information of destabilizing failure of coal with different propensity to impact, three kinds of mine-prone coal samples with no, weak and strong impact were selected as targets to observe the infrared radiation characteristics during the process of coal loading failure. The results show that the variation range of temperature field without impact propensity coal is small, the average surface temperature changes within 0.01 ℃, the average temperature of weak impact propensity coal surface increases up to 0.18 ℃, the average temperature of strong impact propensity coal surface increases Up to 0.21 ℃. There is no obvious high-temperature zone in the process of loading without impacting tendency, and the high-temperature zone formed by shearing failure in the process of loading with impacting tendency, and the stronger the impacting tendency is, the larger the range and intensity are. Prior to the destruction of the propensity coal, the surface rupture area of the coal sample was a precursor to the change in temperature, while the unbroken area was the precursor to the change in temperature.