The anisotropic mechanical and acoustic emission characteristics of oil shale from room temperature to 600 °C were studied using a real-time high-temperature uniaxial rock testing machine independently developed by the Taiyuan University of Technology and an acoustic emission test system. The results indicate that the elastic modulus and compressive strength of the oil shale perpendicular to bedding direction first decrease and then increase with increasing temperature from room temperature to 600 °C and reach their minimum values at 400 °C, showing the characteristics of first softening and then hardening. The threshold temperature of oil shale mechanical parameters in the direction perpendicular to bedding direction is 400 °C. The strength of oil shale parallel to the bedding direction decreases sharply at 100 and 400 °C due to free water evaporation and kerogen pyrolysis, respectively. The threshold temperatures of oil shale mechanical parameters parallel to bedding direction are 100 and 400 °C. The micro-SEM and CT analyses conclude that the transformation of the mineral structure changes the mechanical parameters of oil shale perpendicular to bedding, and the evolution of the fracture structure dominates the change in the mechanical parameters of oil shale parallel to bedding. The results of this study can provide a theoretical data basis for elucidating the in situ pyrolysis of oil shales.

利用太原理工大学自主研发的实时高温单轴岩石试验机和声发射测试系统，研究了油页岩在室温至600 ℃范围内的各向异性力学和声发射特性。结果表明，垂直于层理方向的油页岩的弹性模量和抗压强度随温度从室温升高到600 ℃先降低后升高，在400 ℃时达到最小值，表现出先软化、先软化的特征。然后硬化。垂直于层理方向的油页岩力学参数阈值温度为 400 ℃。由于自由水蒸发和干酪根热解，平行于层理方向的油页岩强度分别在 100 和 400 ℃急剧下降。平行于层理方向的油页岩力学参数阈值温度分别为 100 和 400 ℃。显微扫描电镜和CT分析表明，矿物结构的转变改变了垂直于层理的油页岩力学参数，裂缝结构的演化主导了平行于层理的油页岩力学参数的变化。研究结果可为阐明油页岩原位热解提供理论数据基础。显微扫描电镜和CT分析表明，矿物结构的转变改变了垂直于层理的油页岩力学参数，裂缝结构的演化主导了平行于层理的油页岩力学参数的变化。研究结果可为阐明油页岩原位热解提供理论数据基础。显微扫描电镜和CT分析表明，矿物结构的转变改变了垂直于层理的油页岩力学参数，裂缝结构的演化主导了平行于层理的油页岩力学参数的变化。研究结果可为阐明油页岩原位热解提供理论数据基础。