断层倾角对冲击地压危险性影响研究

Impact of Fault Dip Angle on Risk of Rock Burst

采用FLAC3D数值模拟软件,以接触面单元模拟断层上下盘构造关系,模拟在断层地质构造下,工作面从断层下盘向断层面推进过程中,在不同断层倾角和落差下的矿山压力分布规律和断层带位移变化规律。结果表明,在正断层地质构造下,以下盘工作面开采为研究对象,距断层距离40 m处,断层倾角小于70°时,诱发冲击地压的危险性较大,当断层倾角大于70°时,冲击地压危险性有所降低。

The FLAC3Dnumerical simulation software was used to simulate the structural relationship between the upper and lower plates of the fault with the contact surface unit,and the mine pressure distribution law and the displacement change law of the fault zone under different fault dip angle and throw when the working face advanced from the fault footwall to the fault plane under the fault geological structure were simulated.The results show that under the normal fault geological structure,taking the mining of the lower face as the research object,when the fault inclination is less than 70°at the distance of 40 m from the fault,the risk of induced rock burst is greater;when the fault inclination is greater than70°,the risk of rock burst is reduced.