Micro-CT技术在某地下工程裂隙岩体三维显微结构表征的应用

Application of Micro-CT Technology in the Characterization of 3D Microstructure of Fractured Rock Mass in an Underground Project

造成地下工程开挖过程中涌突水危害的主要灾害源为导水夹泥构造。裂隙岩体渗透率主要受其内在裂隙结构与空隙分布特征影响,其中充填物的微观组分以及孔隙结构特征至关重要。以某地下工程为研究背景,通过Micro-CT技术对多组不同位置试样的孔隙结构进行表征,从微观角度诠释影响其渗透性的作用机制。X射线三维显微镜突破光学显微镜、扫描电镜等传统的表面显微成像技术方法的局限性,可以精准表征样品内部的三维显微结构,为裂隙岩体及其充填物的研究提供全新的高分辨率无损透视检测技术手段。

The main disaster source that causes water inrush hazards during the excavation of underground project is the water-conducting mud structure.The permeability of fractured rock mass is mainly affected by its internal fracture structure and void distribution characteristics,in which the microscopic composition and pore structure characteristics of the filling are very important.Taking an underground project as the research background,this paper uses Micro-CT technology to characterize the pore structure of multiple sets of samples at different locations,and interpret the mechanism that affects its permeability from a microscopic point of view.X-ray three-dimensional microscope breaks through the limitations of traditional surface microscopy imaging techniques such as optical microscopes and scanning electron microscopes.It can accurately characterize the three-dimensional microstructure inside the sample and provide a brand new high-level for the study of fractured rock masses and their fillings.Resolution non-destructive fluoroscopy detection technology.