深部开采构造型突水危险性数值模拟分析

本文以三山岛金矿为工程背景,利用FLAC3D数值软件建立矿井深部开采流-固耦合数值模型,采用房柱式交替向上充填采矿法,在模拟采动条件下,尤其是采场通过F3断层时,矿体、充填体内渗流场以及塑性区的演化过程,对矿井不同开采时段、不同开采区域的突水危险性进行分析.试验结果表明:①距离断层较远时(-825 m-1盘区),随着回...

Numerical simulation analysis of structural water inrush risk in deep mining

In order to correctly understand the evolution behavior of deep structural water inrush and accurately predict the risk of mine water inrush, in this paper, taking Sanshandao gold mine as the engineering background, the FLAC_^3D numerical software is used to establish the fluid solid coupling numerical model of deep mining, simulates the evolution process of seepage field and plastic zone in ore body and filling body under mining conditions, especially when the stope passes through F3 fault, and analyzes the risk of water inrush in different mining periods and areas. The test results show that: (1) In Sanshandao Gold Mine, the room and pillar alternate upward filling method can not only meet the mechanical properties and stability requirements of stope structure such as pillars, but also reduce the pore water pressure near the stope and avoid the occurrence of water inrush accidents; With the development of mining activities, the filling body in each panel has shear failure, while the ore body is mainly tensile failure. (2) With the increase of buried depth, the risk of water inrush in fault zone increases rapidly; In the process of mining, when the working face approaches or passes through the fault zone, the water inflow of the mine increases rapidly, which is the most dangerous time of water inrush in the mine, the key monitoring should be done, and the occurrence of water disasters can be prevented by grouting and other means.