In this study, uniaxial compression testing was carried out to investigate the response of quartz mica schist to water in terms of strength and energy anisotropy. The micromechanism and water action mechanism of the anisotropic properties of the schist were further discussed based on microscopic observations of the rock fabric and analysis of the mineral composition of the solid precipitant after immersion. Mechanical tests reveal that both the failure strength and crack initiation strength of dry schist change in a U shape with the schistose angle; moreover, the strength anisotropy of schist generally increases with increasing immersion time. The specimen with α = 30° has the minimum energies, while that with α = 90° exhibits the maximum total and elastic energies. The total and elastic energies of dry specimens decrease significantly after saturation, but the influence degree of water on the energy of schist differs with the schistosity orientation. The energy response of specimens with α = 30° and 0° to water is more sensitive than that with α = 90°. The internal energy allocation of schist was found to be associated with the schistosity orientation and immersion time. Based on the analysis of microcrack propagation and macro-failure, it is concluded that the fabric of schist plays an essential controlling role in the strength and energy anisotropy. The response of anisotropy to water is closely dependent on the lubrication and disintegration of flaky minerals and the hydraulic action on the tips of voids in response to external compression.

在这项研究中，进行了单轴压缩测试以研究石英云母片岩对水的强度和能量各向异性响应。通过对岩石组构的显微观察和浸泡后固体沉淀物的矿物成分分析，进一步探讨了片岩各向异性性质的微观机理和水作用机理。力学试验表明，干片岩的破坏强度和裂纹萌生强度均随片岩角度呈U形变化；此外，片岩的强度各向异性一般随着浸泡时间的增加而增加。与试样α  = 30°具有最小的能量，而与α = 90° 表现出最大的总能和弹性能。饱和后干试样的总能和弹性能显着降低，但水分对片岩能量的影响程度随片理取向不同而不同。α  = 30°和0°的试样对水的能量响应比α更敏感 = 90°。发现片岩的内部能量分配与片理取向和浸没时间有关。通过对微裂纹扩展和宏观破坏的分析，得出片岩结构对强度和能量各向异性起着至关重要的控制作用。各向异性对水的响应密切依赖于片状矿物的润滑和分解以及响应外部压缩对空隙尖端的水力作用。