Numerical simulation of mining-induced fracture evolution and seepage movement in coal seam floor above confined aquifer
Xing Shengsheng
Abstract：The evolution law of fissures caused by stress damage-flow coupling in the mining process is crucial for accurately and timely predicting and preventing coal mine water disasters.A fluid solid coupling simulation method was proposed for Shanxi Haitian Coal In-dustry,which was used to simulate the development of fractures in the floor rock layer and the accompanying seepage movement during the mining process of the upper coal seam under pressure water.The numerical results successfully reproduced the development of frac-tures,changes in permeability,and formation of water inrush channels in the floor rock layers during the mining process.The most deep-ly penetrated fractured zone appears below both sides of the goaf,rapidly extending downwards with increasing mining distance,and ulti-mately penetrating to the underlying pressurized aquifer,forming a through water inrush channel with rapidly increasing water pressure and seepage rate.The study obtained the mechanism of water breakout to the underlying confined aquifer,which can help to improve the prediction and prevention of water damage in coal mines.
Keywords：coal miningwater inrushfracture developmentpermeability evolution
Publication Date：2025-10-30
Online Publishing Date：2025-11-27(First online date of this platform, not the publication date of the document)
Pages：6( 97-101,107 )