温度梯度对树脂锚固材料蠕变特性的影响  

Influence of temperature gradient on creep characteristics behind resin anchoring materials

作　　者：姚直书[1] 李会 刘小虎 王佳奇 Yao Zhishu;Li Hui;Liu Xiaohu;Wang Jiaqi(School of Civil Engineering&Architecture,Anhui University of Science&Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232000

出　　处：《黑龙江科技大学学报》2024年第5期729-736,共8页Journal of Heilongjiang University of Science And Technology

基　　金：安徽高校自然科学研究项目(2022AH050814)。

摘　　要：为探究深部巷道围岩锚固支护结构在高地温环境下的长期稳定性,以树脂锚固材料为例,利用单轴压缩试验、单轴蠕变试验以及蠕变修正模型,研究了树脂锚固材料在不同温度环境下的自身强度及蠕变特性。结果表明:温度对树脂锚固剂抗压强度的影响比较大,抗压强度随着温度的升高大致呈线性衰减,衰减速率约为0.48 MPa/℃;随着温度升高和应力水平的增加,树脂锚固剂的蠕变量和蠕变速率逐渐加快,蠕变破坏阈值减小;修正过后的广义开尔文蠕变模型不仅极大地克服了原蠕变模型在加载应力范围上的局限性,还可以很好地描述并且预测不同温度、不同应力水平下的树脂锚固剂的蠕变特性和变化趋势;SEM电镜扫描显示,温度越高,树脂锚固剂内部的裂缝就越明显。This paper aims to investigate the long-term stability of the anchoring and supporting structures for deep roadway surrounding rock in high-temperature environments.The experiment using the resin anchoring materials as an example,studies its own strength and creep characteristics under different temperature environments through uniaxial compression tests,uniaxial creep tests,and creep correction models.The results indicate that the temperature has a significant impact on the compressive strength of resin anchoring agents,and the compressive strength generally decays linearly with temperature increasing,with a decay rate of 0.48 MPa/℃ approximately.With the increase of temperature and stress level,the creep amount and creep rate of the resin anchoring agent gradually accelerate,and the creep failure threshold decreases.The revised generalized Kelvin creep model not only greatly overcomes the limitations of the original creep model in the loading stress range,but also can well describe and predict the creep characteristics and trends of resin anchoring agents under different temperatures and stress levels.SEM scanning performs that the higher the temperature,the more obvious the cracks inside the resin anchoring agent is.

关 键 词：树脂锚固剂 不同温度 单轴蠕变 修正广义开尔文蠕变模型 

分 类 号：TD353[矿业工程—矿井建设]