集成回填材料受热作用物理性质变化规律

摘要

By experiment, the changing rules of physical nature disturbed by heated integrated backfilling materials was studied, especially the thermo - responsiveness of backfilling materials and micro - structure mechanical performance in different thermal fields and time. The result showed that backfilling materials＇ moisture content kept a overall down- trend with the increase of temperature and thermal effect time. When temperature （T） 〈 60℃ and thermal effect time （t） 〈96 h, moisture content fell slightly. However, when T≥60 ℃ and t≥96 h, moisture content fell evidently. Through triaxial compression test, it found that integrated materials＇ main stress difference value rose with the increase of temperature and thermal effect time.%通过试验研究集成回填材料受热扰动的物理化学性质的变化规律,尤其在不同温度场和时间作用下回填材料的热响应性及其细观结构力学属性的表现。研究发现：集成回填材料的含水率随温度和热作用时间的增加整体呈下降趋势,当温度T〈60℃,热作用时间t〈96 h时,含水率下降幅度很小;当温度T≥60℃,热作用时间t≥96 h时,含水率有明显下降。通过三轴压缩试验试验还发现,在一定温度范围内,集成材料的主应力差峰值随温度和热作用时间的增加而增大。