新型化学注浆材料模拟实验加固体力学性能研究

发布时间：2018-06-27 15:55

  本文选题：注浆技术 + 聚氨酯　； 参考：《安徽理工大学》2015年硕士论文

【摘要】：以煤层破碎顶板注浆为工程背景,研究新型聚氨酯浆液注浆加固体的力学性能。双组份新型化学注浆材料温度越高,反应速度越快,固化时间越短,反应温度也越高。纯浆液固结体的单轴抗压强度为102.03MPa。标准砂固结体的单轴抗压强度为63.64MPa。 利用研制的注浆实验装置,通过压力表、热电偶、应变片以及压力盒等测试元件,测定了注浆试验过程中注浆压力、温度变化过程,注浆压力最大值0.75MPa,实验装置内部压力盒最大压应力0.78MPa,与注浆压力基本一致,在10min左右测得最大反应温度53℃。室温养护后开模,加固体表面浆脉清晰,固结均匀,表观效果较好。 对加固体取芯进行力学性能试验,混凝土实体芯样的抗压强度为31.05MPa,含一条浆脉和米字形浆脉的抗压强度分别为23.16MPa、22.64MPa,其抗压强度分别达到混凝土实体抗压强度的74.6%、72.9%；混凝土实体芯样粘聚力为0.97MPa和内摩擦角31.4°,含浆脉芯样试件粘聚力为0.75MPa,内摩擦角为28.7°,其粘聚力和内摩擦角分别达到混凝土实体的77.3%、91.4%;混凝土实体芯样试件抗拉强度为1.98MP,浆脉较细和较粗的芯样试件的抗拉强度分别为1.40MPa、1.28MPa,其抗拉强度分别达到混凝土实体抗拉强度的70.7%、64.6%。对比分析单轴抗压强度、抗剪强度、抗拉强度等力学性能,综合评价注浆效果良好。
[Abstract]:The mechanical properties of a new type of polyurethane slurry and solid were studied in the background of coal seam broken roof grouting. The higher the temperature, the faster the reaction rate, the shorter the curing time and the higher the reaction temperature. The uniaxial compressive strength of pure slurry consolidation is 102.03 MPa. The uniaxial compressive strength of the standard sand consolidation body is 63.64 MPA. The grouting pressure and temperature change in the grouting test process were measured by means of the pressure gauge, thermocouple, strain gauge and pressure box and so on. The maximum grouting pressure of 0.75 MPA and the maximum pressure of 0.78 MPa of the inner pressure box of the experimental device are basically the same as the grouting pressure, and the maximum reaction temperature measured at 10min is 53 鈩，

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