摘要
为了研究高温单向约束对煤层砂岩物理力学行为的影响,对高温后砂岩试样进行单轴压缩试验,分析了物理及力学特性随温度的变化规律。试验结果表明:随着温度的升高,砂岩体积增大,质量和密度不断减小。应力应变曲线随温度升高逐渐由脆性向塑性转变。随着温度的升高,峰值强度和弹性模量均逐渐降低,而峰值应变逐渐增大。
To investigate the physical and mechanical behavior of high temperature unidirectional constraint of coal seam sandstone,uniaxial compression was carried out on sandstone samples after high temperature.the variation law of physical and mechanical properties with temperature was analyzed.The results show that:With the increase of test temperature,the volume of sandstone increases and the mass and density decrease.As the temperature increases,the stress-strain curves gradually changes from brittleness to plasticity.The peak strength and Elastic modulus decreases with increasing temperature gradually,however,the peak strain increases gradually.
作者
王珍珍
Wang Zhenzhen(School of Civil Engineering,Henan Polytechnic Universuty,Jiaozuo 454003,China)
出处
《山西建筑》
2021年第6期75-77,共3页
Shanxi Architecture
关键词
高温单向约束
煤层砂岩
单轴压缩
high temperature and uni-directional restraint
coal seam sandstone
uniaxial compressive strength
