基于不同正断层角度的上盘工作面突水数值模拟分析

Numerical Simulation of Water Inrush of Hanging Working Face at Different Normal Fault Dips

运用FLAC3D软件,模拟位于正断层上盘的工作面推进过程中不同的断层倾角对工作面突水的影响。模拟结果表明:断层倾角越小,底板和煤柱塑性破坏越严重,容易导致承压水通过底板裂隙进入工作面引起突水;断层倾角越大,断层活化越明显,承压水的导生速度、高度、渗透幅度均增大,容易通过煤岩柱塑性破坏区进入工作面引起突水。

FLAC^（3D） was used to simulate the effect of different fault dips on the water inrush in the advancing process of the hanging working face of normal faults.The results show that the smaller the fault dips are,the worse the plastic failure of floor and coal pillars is,which can lead to the water inrush when confined water goes into the working face through floor fissures;the larger the fault dips are,the more obvious the fault activation is.With the increase of the speed,height,and permeability of the confined water,it could enter the working face to cause the water inrush through plastic failure zones.