岩石红外辐射温度随岩石应力变化的规律和特征以及与声发射率的关系

HE RULE AND CHARACTERISTICS OF CHANGE OF INFRARED RADIATION TEMPERATURE ALONG WITH STRESS OF ROCKS AND THEIR RELATION TO AE RATE

摘要:

在实验室对不同岩性不同结构的岩石试件进行单轴加载至试件破裂试验,得出了如下主要结果:(1)岩石试件的红外辐射温度随应力增加而变化,温度变化的范围在0.2℃-0.8℃。(2)岩石试件临破裂前出现明显的岩石破裂温度前兆。(3)有一部分岩石试件临破裂前出现高温条带、高温区或低温条带、低温区。不久,试件沿高温条带、区或低温条带、区发生主破裂。(4)有一部分岩石试件在临破裂前出现温度脉冲,正脉冲达到2.8℃,负脉冲达到-1.0℃。(5)当应力增加时,岩石试件的辐射温度增加与声发射率增加呈互补关系。

Abstract:

The rupture experiments for rock samples of different properties and structures during uniaxial loading were made in laboratory.The following major results were obtained:(1)The radiation temperature of rock samples changed along with increasing of stress,the range of temperature change was 0.2℃-0.8℃。(2)The obvious temperature precursor appeared before rock rupture.(3)High-temperature belts and regions or low-temperature belts and regions appeared before rupture for some rock samples,then the major faults happened along the belts and regions.(4)The temperature pulses appeared before rupture for some rock samples, the plus pulses were about 2.8℃ and the minus pulses were about-1.0℃.(5)When the stress increases,the increasing of temperature and the increasing of AE rate of samples appear complementary relation.