基于微震反演裂隙的采动岩体损伤分析方法及其工程应用

采动条件下岩体发生渐进损伤诱使裂隙萌生、发展和贯通,继而形成导水通道诱发突水灾害.该过程涉及裂隙演化及岩石损伤等问题,使得突水灾害具有动态复杂性的特点.显然,从理论上准确解译突水通道及其演化规律是十分困难的,需要依靠现场监测和数值模拟手段.为此,从"岩体变形破裂过程中,微震现象的主要本质是裂隙的扩展"学术观点出发,建立...

Damage analysis method for mining rock mass based on microseismic-derived fractures and its engineering application

The progressive damage of rock masses under mining conditions will induce the initiation,development and connection of fractures,form water inrush channels,and finally induce water inrush disasters.This disastrous process involves fracture evolution and rock damage,making the water inrush disasters dynamic and complex.It is challenging to accurately interpret the evolution law of the water inrush channels in theory,which needs to rely on the field monitoring and numerical simulation.Therefore,from the theoretical point of view that "the main essence of microseismic(MS) phenomena is the propagation of fractures",an anisotropic damage model is established based on the MS data.This model is combined with FLAC^3D numerical simulation analysis,which is expected to link macroscopic mechanical behavior of rock masses with fracture development.Finally,the research results are applied to the analysis of the water inrush channels of the grouting curtain in Zhangmatun Iron Mine.The damage process and the damage tensor of the instability zone are analyzed,the distribution of water inrush channels is determined,and the numerical model is established from the perspective of seepage-stress-damage.The characteristics of stress and plastic yield zone between curtain and stope are studied,and the characteristics and formation mechanism of the water inrush channels induced by mining are determined to provide help for the safe mining and water treatment design of mines.