摘要
为分析冻土单轴抗压强度、弹性模量和泊松比随温度变化的规律,以及冻土的蠕变规律,开展单轴压缩和单轴蠕变试验,研究袁大滩矿主斜井冻结表土层的物理力学性质。试验结果表明,单轴抗压强度和弹性模量随冻土温度的降低而增加,泊松比随冻土温度的降低而减小,冻土的蠕变应变较小,但当应力水平较高时,冻结黏土会发生蠕变断裂。
To analyze the law of uniaxial compressive strength of frozen soil, elastic modulus and poisson＇s ratio with temperature change, and the creep law of frozen soil, the uniaxial compression and uniaxial creep test are carried out, studying on physical and mechanical properties of frozen surface soil in main inclined shaft of Yuandatan mine. The results show that the uniaxial compressive strength and elastic modulus increase with the decrease of the frozen soil temperature, and the poisson＇s ratio decreases with the decrease of the temperature. The creep strain of the frozen soil is small, but when the stress level is high, the frozen clay will occur creep rupture.
作者
杨金宏
赵健
程玉波
YANG Jin-hong;ZHAO Jian;CHENG Yu-bo(Department of Technology Information, China Coal Construction Engineering Group Co., Ltd., Beijing 102218, China;School of Resources and Safety Engineering, China University of Mining and Technology （Beijing）, Beijing 100083, China)
出处
《煤炭技术》
CAS
2018年第7期4-6,共3页
Coal Technology
基金
高等学校博士学科点专项科研基金项目(20120023110023)
中央高校基本科研业务费专项资金资助项目(2014QZ03)
关键词
冻土力学
单轴抗压强度试验
单轴蠕变试验
frozen soil mechanics
uniaxial compressive strength test
uniaxial creep test
