利用MTS810电液伺服材料试验系统以及高温炉MTS652.02,在常温(25℃)~800℃条件下对泥岩试件进行了单轴压缩实验,分析了温度对泥岩的应力-应变曲线、弹性模量、峰值应力及峰值应变的影响。结果表明:泥岩的弹性模量在常温~400℃范围内随着温度的升高呈现明显的增加趋势,经历600℃高温后泥岩的弹性模量开始急剧下降,在600~800℃内弹性模量提高幅度不大;泥岩的峰值应力在常温~400℃时呈明显上升趋势,温度达到600℃时急剧下降,600℃之后则呈平缓下降态势;泥岩的峰值应变在100℃以前随温度的升高变化不是很明显,在100~400℃内呈逐渐上升趋势,高于400℃后有下降趋势,当温度达到800℃时峰值应变又有小幅度的上升。
Uniaxial compression test on mudstone specimens was conducted by MTS810 electro-hydraulic servo-controlled rock mechanics testing system and MTS652.02 high-temperature furnace under the temperature from 25℃ to 800℃,and the influences of temperature on the curve of stress-strain,elastic modulus,peak strength and peak strain of the mudstone were analyzed.The main results of the study are as follow:The elastic modulus of mudstone has an obviously-increasing trend from room temperature to 400℃,then decreases rapidly when the temperature rises to 600℃,and has a little change from 600℃ to 800℃;The peak strength has an obviously-increasing trend from room temperature to 400℃,and decreases rapidly when the temperature rises to 600℃,but it decreases slowly when the temperature is over 600℃;The change of the peak strain is not very obvious when the temperature is below 100℃,and has an gradually-increasing trend from 100℃ to 400℃,begins to decrease when the temperature is over 400℃,but the peak strain has a slightly increase with the temperature rising to 800℃.