【摘要】 文中回顾了国内外岩溶砂化白云岩的研究现状，并从发生环境、介质条件、微观机理和机制四个层次对岩溶砂化白云岩进行系统阐述，认为构造导致白云岩砂化的主要力学机制是区域性挤压形成的弥漫性X型剪节理系，X型剪节理系中节理开度的增大，局部应力场诱发的脆性破裂对于白云岩砂化程度的提升也发挥了重要作用。岩溶白云岩发生于非饱和带中的物理砂化是,岩石的矿物成分及全岩化学成分不变,矿物、岩石及岩体的结构与构造特征均被保留的情况下,造岩矿物之间的结构连接弱化或消失的一种地质演化方式。更多还原

【Abstract】 This article first reviewed the domestic and foreign research status quo of karst sand, dolomite, and from the environment, medium conditions, microscopic mechanism and mechanism of the four levels was carried out on the sand, dolomite karst system elaboration, thought construction led to the main mechanics mechanism of dolomite sand is the regional extrusion formation of the diffuse x-shaped shear joint system, X shear joints and the increase of the opening in the joint system, The brittle fracture induced by local stress field also plays an important role in the improvement of dolomite sanding degree. The physical sanding of karst dolomite in unsaturated zone is a geological evolution mode in which the structural connection between rock forming minerals weakens or disappears under the condition that the mineral composition and chemical composition of rock are unchanged and the structure and structural characteristics of mineral, rock and rock mass are retained.更多还原