温度对泥岩力学性能的影响  

Influence of Temperature on Mechanical Properties of Mudstone

作　　者：刘瑞雪[1,2] 茅献彪[1,2] 张连英[1,3] 李雁[3] 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州市221008 [2]中国矿业大学力学与建筑工程学院,江苏徐州市221008 [3]徐州工程学院土木工程学院,江苏徐州市221008

出　　处：《矿业研究与开发》2012年第4期97-99,118,共4页Mining Research and Development

基　　金：国家重点基础研究发展计划(973)项目(2010CB226800);国家自然科学基金重点项目(50834004);国家自然科学基金项目(51074166;51104128);住房和城乡建设部科学技术项目(2011-k3-5);江苏省高校自然科学研究项目(11KJD130002);江苏省研究生培养创新工程项目(CX09B_108Z);江苏省"青蓝工程"项目

摘　　要：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℃.

关 键 词：泥岩 高温作用 应力-应变曲线 弹性模量 峰值应力 峰值应变 

分 类 号：TD315[矿业工程—矿井建设]