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岩体在高温作用下其内部微观结构会发生明显变化，比较不同高温作用后岩石纵波波速并结合核磁共振技术研究了内部孔隙结构与纵波波速的变化趋势。试验结果表明：随着热处理温度的升高，花岗岩试样的T2弛豫时间、T2谱面积、信号幅值总体上呈现增大趋势，孔隙数量与总体积也逐渐增加。通过孔隙度与热损伤因子等参数建立的花岗岩在不同高温热处理后的热损伤模型可得出，花岗岩热损伤明显增加的两个阈值温度分别为600与900 ℃。该结论可为经历高温环境的岩体工程可行性分析提供参考。
Abstract：The internal microstructure of rock masses will experience significant changes under the influence of high-temperature treatment. By comparing the longitudinal wave velocity of rock after heat treatment at different temperatures and using the nuclear magnetic resonance technology， the changing trends of the internal microstructure and longitudinal wave velocity were studied. The results indicated that as heat treatment temperature increased， the T2 relaxation time， T2 spectral area and signal amplitude of granite samples ascended as a whole. The quantity of pores and the total volume gradually increased as well. The thermal damage model of granite after heat treatment at different temperatures was established upon such parameters as porosity and thermal damage factor， from which it can be concluded that the two threshold temperatures at which the thermal damage of granite remarkably deteriorates are 600 and 900 ℃. These conclusions can provide references for the feasibility analysis of rock mass projects in high temperature environment.
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基本信息:
中图分类号:TU45
引用信息:
[1]孔宏亮,廖小辉,田诺成,等.细粒花岗岩热损伤核磁共振定量表征[J].青岛理工大学学报().
基金信息:
国家自然科学基金（42301098）
2026-04-15
2026-04-15
2026-04-15