摘要
为了验证可根据岩石单轴受压体应变最大值大致对应出岩石的长期强度这一观点,对4个砂岩试样进行单轴受压试验,采用千分表测出受压过程中的径向变形,计算出径向应变和体应变,得出岩样单轴受压时轴向应力-体应变曲线,结果表明:岩石单轴受压时发生的是剪切破坏,轴向应力-体应变曲线极不规则.得出的结论是无法根据岩石单轴受压体应变的变化特征确定出岩石的长期强度.
Some literatures state that long-term rock strength can roughly be determined according to the maximum value of rock sample's bulk strain under uniaxial compression.In order to study the relationship between rock's bulk strain and long-term strength,the uniaxial compression tests on four sandstone samples have been carried out with the measurement of sample deformation in radial direction using a micrometer.The result shows that the curve of bulk strain-stress in axial direction is extremely irregular.Therefore,the long-term rock strength cannot be measured from the variation characteristics of bulk strain.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2012年第3期358-361,共4页
Journal of Liaoning Technical University (Natural Science)
基金
重庆教委科研基金资助项目(KJ091405)
重庆市建设委员会基金资助项目(城科字2011第(84)号)
关键词
岩石
蠕变
单轴受压
体应变
长期强度
剪切破坏
千分表
径向变形
rock
creep
uniaxial compression
bulk strain
long-term strength
shear failure
micrometer
deformation in radial direction
