【摘要】 利用红外热像仪对干燥和潮湿砂岩单轴压缩过程中的红外辐射特征进行了试验比较.结果表明:潮湿岩石加载过程中平均红外辐射温度(AIRT)随载荷增加呈上升趋势,AIRT与应力的变化步调一致,曲线波动较小;岩石失稳前单位载荷下潮湿岩石的升温幅度高于干燥岩石,水对岩石受力时的红外辐射具有明显推动作用,但破坏瞬间热像特征变化不很明显.干燥砂岩AIRT与应力的关系不是简单的对应关系,但在破坏瞬间出现显著的增温现象和热像特征的明显变化.可以利用潮湿岩石AIRT与应力的良好同步性监测潮湿岩石的应力变化过程,利用干燥岩石破裂瞬间的热像变化特征分析岩石灾变的空间位置与灾变模式.更多还原

【Abstract】 The infrared radiation from dry sandstone and damp sandstone in the process of uniaxial compression was detected by means of infrared thermal imager.It was revealed that the average infrared radiation temperature(AIRT) of damp rock increases with loading and keeps its change in step with the stress,and that the fluctuation of AIRT is much less.The AIRT increment of damp rock is higher than that of dry rock under unit load before destabilization and the fact shows that water will intensify the infrared radiation from loaded rock,but no obvious change was found on thermal image during the instantaneous fracture of damp rock.The relation between the AIRT and stress in dry rock is not simply in corresponding state like damp rock,but the obvious AIRT rise and change of thermal images of dry rock were found during instantaneous fracture.It’s possible to monitor the rock stress of damp rock via the change synchronization between AIRT and stress,and to analyze the spatial position and mode of the catastrophe by making use of the change of thermal images during instantaneous fracture of dry rock.更多还原