不同含水率对磷块岩热红外辐射特征的影响研究

Study on the influence of different water content on thermal infrared radiation characteristics of phosphorus block rock

为探究不同含水率磷块岩的热红外辐射特征,分别对烘干磷块岩、天然含水磷块岩和饱水磷块岩进行单轴加载试验,分析不同含水率磷块岩的受力特性、破坏特征和红外辐射特征。结果表明:磷块岩含水率越高,在失稳前红外辐射的升温幅度越大,含水率越低,升温幅度越小;磷块岩红外前兆异常显示,临近破裂前会出现短暂降温现象,含水率越高,降温幅度越小,含水率越低,降温幅度越大;磷块岩在最终破裂瞬间会发生红外辐射温度突升,含水率越低,突变值越大,含水率越高,突变值越小。

In order to explore thermal infrared radiation characteristics of phosphorite with different water content,uniaxial loading tests were carried out on dried phosphorite,natural water-bearing phosphorite and water-saturated phosphorite respectively,and the mechanical characteristics,failure characteristics and infrared radiation characteristics of phosphorite with different water content were analyzed.The results show that the higher the water content of phosphorite,the larger the temperature rise amplitude of infrared radiation before instability,the lower the water content and the smaller the temperature rise amplitude;the infrared precursor anomaly of phosphorite shows that a short temperature drop phenomenon will occur before fracture,the higher the water content,the smaller the temperature drop amplitude,the lower the water content and the larger the temperature drop amplitude;the infrared radiation temperature rise will occur at the moment of final fracture of phosphorite,the lower the water content,the larger the abrupt change value,the higher the water content and the smaller the abrupt change value.