岩石变形破裂红外与微波辐射变化特征对比研究

利用实验的方法对岩石单轴压缩过程中红外辐射、微波辐射、应变进行了联合测试.实验结果表明,红外与微波辐射的变化特征随应力的阶段性发展,二者呈现不同的阶段性变化规律与破裂前兆特征.红外辐射呈现初始阶段变化很小、弹性阶段缓慢增加、塑性阶段快速增加以及临破裂前回落的变化特征;而微波辐射呈现初始阶段微降、弹性阶段上升、塑性阶段下降以及临破裂前上升的变化特征.红外与微波在岩石破裂前均出现早期和晚期前兆,但前兆规律不同,异常变化形式正好相反.两种手段结合可以更好地监测岩石的应力与灾变现象.

Comparative Study on the Variation Features of Infrared and Microwave Radiation in Deformation and Fracture Process of Rock

Multivariate information including infrared radiation， microwave radiation and strain were measured in uniaxial compressive experiments of rock. The result showed that infrared radiation and microwave radiation existed different staged variation features at various loading stages. The infrared radiation showed fluctuation in the initial loading stage， steady increase in elastic stage， rapid increase in the plastic stage and decrease in the fracture stage. The microwave radiation showed small decrease in the initial loading stage， steady increase in the elastic stage， decrease in the plastic stage and increase in the fracture stage. Two kinds of radiation information appeared different abnormal precursors of rock fracture， and the variation forms of precursors were just opposite. The combination of two detection technologies is favorable for detection of stress and disaster of rock.