各向异性软岩的变形与渗流耦合特性试验研究

根据泥质粉砂岩和泥岩在垂直和平行于层理面的条件下进行的三轴压缩和渗流试验，得到了不同围压及岩石成层条件下泥质粉砂岩和泥岩的弹性模量，建立了基于层理面夹角和围压的软岩弹性模量控制方程。渗透张量与应力的耦合关系是各向异性渗流耦合分析的关键问题，通过引入应力主轴与渗透主轴非一致时渗透张量与应力的响应关系，建立了各向异性渗透张量与应力耦合的控制方程，并对比了试验数据与计算结果，为各向异性软岩渗流应力耦合分析模型的建立奠定了理论基础。

Experimental research on characteristic of deformation and hydromechanical coupling of anistropic rock

Based on triaxial compression and permeability test of brown mudstone and clayey siltstone perpendicular to and parallel with bedding planes, the change rule of elastic moduli of brown mudstone and clayey siltstone is obtained. And elastic modulus expression of soft rock is proposed with different confining pressures and angles of bedding plane. Coupling relation between permeability tensor and stresses is key problem in hydromechanical coupling analysis of anistropic rock. The stress-dependent permeability tensor of soft rock is introduced where principal stresses do not coincide with the principal permeabilities, so control equation of stress-permeability relationship is presented. Measured data and calculation results are compared. And these can be used in the research of the model of hydromechanical coupling in anisotropic soft rock.