摘要
为了研究低温条件下饱水粗粒砂岩的力学特性,以内蒙古自治区鄂尔多斯某冻结副立井为工程背景,以-500～-700 m基岩段粗粒砂岩为研究对象,进行常温(20℃)和不同低温(-10,-15,-20,-30℃)条件下饱水粗粒砂岩的单轴压缩试验,分别探讨低温对饱水粗粒砂岩单轴抗压强度、弹性模量和泊松比的影响以及低温饱水粗粒砂岩的破坏模式。结果表明:随着温度的不断降低,低温饱水粗粒砂岩的弹性模量和单轴抗压强度均不断增大,泊松比不断降低;低温饱水粗粒砂岩单轴压缩破坏形式主要有两种,即柱状劈裂破坏和单一斜截面剪切破坏附带劈裂裂隙。研究结果可为低温条件下岩石力学特性和煤矿冻结凿井施工设计提供参考依据。
In order to study the strength properties of saturated coarse-grain sandstone under low temperatures, taking the frozen auxiliary shaft of Erdos in Inner Mongolia Autonomous Region as the engineering background, the saturated coarse sandstone of the bedrock segment of the elevation - 500 m to - 700 m was tested with u- niaxial compression tests at normal temperature 20℃ and at low temperatures（ - 10, - 15, -20, -30 ℃ ）. The influence of low temperature on the uniaxial compressive strength, elastic modulus and poisson＇ s ratio of saturated coarse sandstone and their thilure modes were studied. The results showed that,with the decrease of the temperature, the elastic modulus and uniaxial compressive strength of low temperature saturated coarse sandstone were increasing, and the Poisson＇ s ratio was decreasing. There were two kinds of compression failure modes of low temperature saturated coarse sandstone, i. e. column splitting failure and shear failure of single oblique section with split fracture. The conclusions provides some reierences tor studying rock mechanics and the construction and design for freezing shafts of coal mines.
作者
种玉配
熊炎林
齐燕军
何伟
孟波
ZHONG Yupei;XIONG Yanlin;QI Yanjun;HE Wei;MENG Bo(Survey Design and Research Institute of China Railway Tunnel Group Co.,Ltd.,Guangzhou 511400,Guangdong,Chian;State Key Laboratory for Geomechanics ＆ Deep Underground Engineering,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China)
出处
《河南理工大学学报（自然科学版）》
CAS
北大核心
2019年第1期19-25,共7页
Journal of Henan Polytechnic University（Natural Science）
基金
国家自然科学基金资助项目(51504247)
关键词
低温
饱水粗粒砂岩
强度特性
破坏模式
low temperature
saturation coarse-grain sandstone
strength property
failure mode
