摘要
为研究遇水冷却温度对高温状态砂岩力学行为的影响,对处于自然状态和遇水冷却后的砂岩进行波速测试、单轴压缩试验以及试验全过程声发射信号监测.结果表明:试样密度衰减率K_ρ和波速衰减率K_v随着峰后遇水冷却温度的降低表现为先小幅度波动再逐渐减小的趋势;随着峰后遇水冷却温度的降低,试样在应力-应变曲线中表现出压密段变短,峰值应变减小的趋势;试样单轴抗压强度和弹性模量均随着峰后遇水冷却温度的降低而增大.最后,基于试样在高温炉内自然冷却所用时间的统计数据,拟合了试样在高温炉内自然冷却情况下实时温度与时间的关系式.
In order to study the effects of temperature of water cooling on the mechanical behaviors of sandstone,the wave velocity tests,uniaxial compression tests and acoustic emission tests were conducted on the sandstone specimens under natural state and water cooling.The results show that K_ρand K_v fluctuate slightly and then decrease gradually with the decrease of temperature.The compaction becomes shorter and the peak strain decreases with the decrease of temperature.The uniaxial compressive strength and elastic modulus of the specimens increase with the decrease of temperature.Finally,the relationship between the real-time temperature and time in the case of natural cooling is proposed.
作者
韩观胜
靖洪文
苏海健
尹乾
吴疆宇
高远
HAN Guansheng;JING Hongwen;SU Haijian;YIN Qian;WU Jiangyu;GAO Yuan(School of Civil Engineering,Shaoxing University,Shaoxing,Zhejiang 312000China;State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2020年第1期69-75,共7页
Journal of China University of Mining & Technology
基金
国家自然科学基金重点项目(51734009)
国家重点研发计划项目(2017YFC0603001)
江苏省自然科学基金项目(BK20180663).
关键词
岩石力学
水冷却
热冲击
力学行为
强度参数
rock mechanics
water cooling
thermal shock
mechanical behaviors
strength parameters
作者简介
通信作者:靖洪文(1963-),男,山东省冠县人,教授,博士生导师,从事岩石力学与工程方面的研究。E-mail:hwjingcumt@126.com,Tel:1380520918
