温度影响下油页岩动力学参数的实验研究

摘要

This paper describes the way the mechanical parameters changes under the influence of temperature have a significant impact on oil shale mining in-situ. The study using rock samples ultrasonic velocity measurement system analyzes change rule of the dynamic elastic modulus and dynamic Poisson's ratio under the action of temperature of oil shale. The results show that dynamic elastic modulus of oil shale conforms to Boltzmann function and dynamic Poisson's ratio agrees with the linear function in the presence of temperature. Changes in mechanical properties of oil shale are mainly due to thermal cracking in the vertival direction, and mainly due to the pyrolysis in the bedding direction.%温度影响下的力学参数变化对油页岩原位开采具有显著影响.利用岩样超声波速测试系统,实验分析了油页岩在温度作用下动弹性模量、动泊松比的变化规律.结果表明:在温度作用下,油页岩动弹性模量变化符合Boltzmann函数关系,动泊松比的变化符合线性函数关系.油页岩力学性能的变化在垂直层理方向上主要由热破裂导致,在平行层理方向主要为热解导致.