不同倾角断层对煤层底板突水影响的数值模拟研究

运用FLAC3D数值模拟软件,通过模拟不同倾角的正断层在采动影响下对煤层底板突水的影响过程,揭示了煤层开采过程中由于断层构造引起的底板突水通道的形成过程,以及倾角对断层活化和底板突水的影响规律。模拟结果表明:小倾角的正断层比大倾角正断层更容易引起突水危险,在实际安全设计时需要留设较宽的防水煤柱。研究结果对指导煤矿的安全生产提供了重要的参考依据。

Numerical Simulation Research on Influence of Faults with Different Dip Angle upon Seam Floor Water Inrush

This paper revealed the formation of floor water inrush channels caused by the fault structure during mining and the influence regularity of the dip angle upon the fault activation and floor water inrush by using FLAC3D numerical simulation software and simulating the influence process of the normal fault with different dip angle upon the seam floor water inrush during mining.The simulated results showed that the normal fault with smaller dip angle can more easily cause dangerous water inrush than that with larger one,so wider safety pillar against water should be remained in the actual safety design.This research result provided important reference basis for the guidance of safety work in coal mines.