Numerical Simulation Research on Activation Water Inrush Mechanism of Mining Floor with Concealed Minor Faults
ZHANG Yong-jun
YANG Deng-feng
CHEN Guan-ping
LI Qian-long
Abstract：In order to obtain the water inrush mechanism of concealed minor faults in coal seam floor during mining,the authors analyzed the evolution law of the floor crack and the formation law of the seepage water inrush channel regulation.The RFPA2D-Flow software was applied to analyse the dynamic process development of floor rock crack development,perforation failure,the water inrush channel forma-tion and floor water inrush during the process of mining in the concealed faults,crack production and extending,evolution process of the formation damage area and seepage transport progress in the mining were gained.The results showed that there were two stages during the process of concealed minor faults water bursting,the active stage and the fracture zone expanding stage. There were some differences for crack connection of concealed minor faults in the different location of the floor,the nearer to the mined-out area,the more potential minor faults activation formed water inrush channel,with the increasing of goaf unloading concealed minor faults the possibility of water inrush was gradually increased.
Keywords：concealed minor faultsfloor water inrushstrata damagewater inrush channel
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 45-47,52 )