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基于沉积结构面的成因类型,通过理论分析和实验研究,分析了沉积结构面的变形与破坏特征,研究了沉积结构面力学特征及其力学效应,提出了弱面型层理、层系或层系组界面和岩层面以及不整合面均为沉积构造弱面,这些弱面对沉积岩体力学性质产生重要的影响。分析了沉积岩体沿层面方向和垂直层面方向岩体力学性质的差异性。研究表明,垂直层面方向的纵波速度和弹性模量要比平行层面方向低;平行层面方向的抗拉强度要大于垂直层面方向;而平行层面方向的抗压强度与凝聚力小于垂直层面方向。沉积岩体易于产生垂直于结构面方向的张性破坏和沿结构面方向的剪切破坏,在采动影响下顶板岩体易于沿岩层层面产生离层破坏现象,这进一步揭示了沉积结构面变形与破坏机制.
Based on the genetic type of the sedimentary structure surface, the deformation and failure characteristics of the sedimentary structure surface are analyzed by theoretical analysis and experimental study. The mechanical characteristics and mechanical effects of the sedimentary surface are studied, and the weak surface layer, layer or layer Facies and facies and unconformities of facies are facies of sedimentary facies, and these weak facies have an important influence on the mechanical properties of sedimentary rocks. The difference of the mechanical properties of sedimentary rock mass along the level direction and the vertical level is analyzed. The results show that the longitudinal wave velocity and elastic modulus in the vertical direction are lower than those in the parallel direction. The tensile strength in the parallel direction is greater than that in the vertical direction. The compressive strength and cohesion in the parallel direction are smaller than those in the perpendicular direction. Sedimentary rock mass tends to produce tensional damage perpendicular to the plane of the structure and shear failure along the direction of the structural plane. Under the influence of mining, the roof rock mass tends to delaminate along the rock formation, which further reveals the deformation of the sedimentary surface Damage mechanism.