摘要
为了探究高温作用下砂岩物理性质的变化规律,对经受不同等级温度后的砂岩试样的纵波波速的变化特性进行研究。试验结果表明:可采用Boltzmann函数理论模拟砂岩vp-T变化曲线并推导出波速随温度变化的理论表达式;高温后砂岩的物理性质会出现弱化现象,其纵波波速会降低,且其经受的温度越高,波速降低的幅度会越大;该砂岩在500℃左右达到其门槛值温度。
Aiming at investigating thoroughly on physical properties changes of temperature, the longitudinal wave velocities are measured for sandstone samples sandstone after high after different grades of high temperature. The results showed that： Boltzmann function can be adapted to depict relative curves of velocity vs. temperature, and its theoretical expression can be derived based on the analyses; The physical properties of sandstone after high temperature appear a certain degradation, its velocity would decrease, and the decrease amplitude increase as the temperature grows; The specimens of sandstone reach temperature threshold value at approximately 500 degrees Celsius.
作者
余裕超
王贺
王硕
王帅
刘语
YU Yu-chao1,2, WANG He3, WANG Shuo2, WANG Shuai2, LIU Yu2(1. School of Civil Engineering, Tianjin University, Tianjin 300350, China; 2. School of Resources and Earth Science, China University of Mining and Technology, Xuzhou 221116, China; 3. School of Civil Engineering, Tsinghua University, Beijing 100084, Chin)
出处
《煤炭技术》
CAS
2018年第4期58-60,共3页
Coal Technology
基金
国家自然科学基金项目(41102201)
国家973项目(2013CB036003)
关键词
砂岩
高温
纵波波速
Boltzmann函数
sandstone
high temperature
longitudinal wave velocity
Bohzmann function
