Abstract Shale is affected by high temperature and loads in deep mining, shale gas extraction, underground disposal of nuclear waste, and other shale projects. This paper aims to investigate the effects of thermal treatment on the physical and mechanical properties of shale. The uniaxial compression test and acoustic emission (AE) monitoring were conducted on shale specimens with different bedding plane inclinations (0°, 30°, 45°, 60°, and 90°) after thermal treatment of different temperatures. The results show that the P-wave velocity decreases with the increase in bedding plane inclination at each thermal treatment temperature showing anisotropy. A thermal explosion occurs when the specimen reaches the macroscopic thermal damage threshold temperature, and the threshold temperature and intensity of the thermal explosion are linked to the bedding plane inclination. The peak stress of specimens with the bedding plane inclinations of 0°, 45°, and 90° increases with the rise in thermal treatment temperature. After thermal treatment, the relationship curve between the cumulative AE counts of specimens with different bedding plane inclinations and time presents a step-jump trend. The thermal treatment has no significant effect on the failure modes of specimens with bedding plane inclinations of 30°, 60°, and 90°, while specimens with bedding plane inclinations of 0° and 45° begin to splitting failure with a rise in the thermal treatment temperature. The rockburst failure occurs in the shale specimens, and the main phenomena are spalling, particle ejection, and block collapse. The thermal treatment has a significant influence on the rockburst intensity of specimens with different bedding plane inclinations.

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热处理对页岩物理力学性能影响的试验研究

摘要 页岩在深部开采、页岩气开采、核废料地下处置等页岩工程中受到高温高负荷的影响。本文旨在研究热处理对页岩物理力学性能的影响。对不同层理平面倾角（0°、30°、45°、60°和90°）的页岩样品进行了不同温度热处理后的单轴压缩试验和声发射（AE）监测。结果表明，在各热处理温度下，纵波速度随着层理面倾角的增加而降低，表现出各向异性。当试样达到宏观热损伤阈值温度时发生热爆炸，热爆炸的临界温度和强度与层理平面倾角有关。层理面倾角为0°、45°和90°的试样的峰值应力随着热处理温度的升高而增加。热处理后，不同层理平面倾角试样的累积AE计数与时间的关系曲线呈现阶跃趋势。热处理对层理面倾角为30°、60°和90°的试件的破坏模式无显着影响，而层理面倾角为0°和45°的试件随着热处理温度的升高开始分裂破坏。处理温度。岩爆破坏发生在页岩标本中，主要现象是剥落、颗粒喷射和块体倒塌。