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为了研究锚固体力-热耦合机制,分别对不同类型的锚固体加载变形破坏过程进行试验研究。应用红外热像技术,获得红外温度场,同时对锚固体进行应力场数值分析。结果显示:中心位置布置单根锚杆的锚固体;应力峰值前,随着荷载的增加,红外温度场呈现整体均匀性升温变化;应力峰值后,在锚杆周围形成一个由多条不同等温线组成的区域,其形状是以锚杆为中心的近似圆形区域,由内向外,温度逐步降低;有锚杆一侧围岩红外温度高于无锚杆一侧,锚杆周围形成一个近似“喇叭”状的等温线图,高温等温线对应高应力区,低温等温线对应低应力区,红外温度场与应力场之间存在空间分布对应关系。
In order to study the mechanics-thermal coupling mechanism of anchors, the loading deformation and failure processes of different types of anchors are studied respectively. The infrared temperature field is obtained by using infrared thermal imaging technology. At the same time, the stress field numerical analysis of the anchor is carried out. The results show that the anchoring body with single root anchor rod is arranged at the center of the rock bolt. Before the peak stress, the temperature distribution of the infrared ray increases with the increase of the load. After the peak stress, a multi- , The shape of which is an approximate circular area centered on the anchor rod, and the temperature gradually decreases from the inside to the outside. The infrared temperature of the surrounding rock on one side of the anchor rod is higher than that on the anchorless side, and an approximate “Horn” -like isotherm map, the high temperature isotherm corresponds to the high stress area, the low temperature isotherm corresponds to the low stress area, and the infrared temperature field and the stress field have the spatial distribution corresponding relationship.