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通过含孔花岗岩的双向加载试验模拟巷道岩爆过程,以红外热像仪为观测手段,利用红外热像和最低红外辐射温度作为监测指标,研究岩爆过程中的红外辐射温度时空演化特征。结果表明:岩爆过程红外辐射时空演化特征与岩爆孕育、发生过程具有良好的同步性。岩爆发生前红外热像上出现低温嵌套于高温条带间的温度场,其在空间上的延伸扩展则是岩爆孕育和发展过程在温度场中的反映,其出现的位置对应着岩爆发生的区域。最低红外辐射温度呈现出上升-短暂下降-上升-下降4个阶段性特征,岩爆发生前最低红外辐射温度出现3个突变转折点。试验结果对于巷道岩爆灾害的时空预测具有一定的理论意义。
Through the two-way loading test of porous granite, the process of rockburst is simulated, the infrared thermal imager is used as the observation method, and the infrared thermal image and the minimum infrared radiation temperature are used as monitoring indicators to study the temporal and spatial evolution of infrared radiation temperature during rockburst. The results show that the temporal and spatial evolution characteristics of infrared radiation during rockburst are in good synchronicity with the occurrence of rockburst. The temperature field of low temperature embedded in the high temperature band appears on the infrared thermography before the rockburst, and its extension in space is the reflection of the rockburst in the temperature field and its location corresponds to the rock burst Occurred area. The minimum infrared radiation temperature showed four stages: rising, shortening, rising and falling. There were three sudden turning points in the lowest infrared radiation temperature before the rockburst occurred. The test results have certain theoretical significance for space-time prediction of rockburst in roadway.