本文运用数值模拟方法,通过改变断层倾角的大小、断层破碎带厚度以及含水层水压对固液耦合模式下采动诱发断层界面应力变化规律进行了模拟研究,揭示了不同工况条件下断层活化突水的影响规律。模拟结果表明:在相同工况条件下,断层的上盘断层界面所受的正应力及剪应力皆大于下盘断层界面所受的相应应力;在工作面推进相同步距时,断层界面所承受的正应力随断层倾角增大而减小,剪应力在倾角为一定范围内随增大而增加,但倾角超过一定角度后其又随之增加而减小;随断层破碎带宽度增加,断层盘界面所受的正应力越大,而剪应力越小;断层界面所承受的正应力及剪应力皆随含水层水压的增加而增加,且水压越大,断层突水危险性就越大。
In this paper, using numerical simulation, variation of interfacial stress of fault induced by mining under solid-liquid coupling mode was studied by changing the size of the fault dip, thickness of fault fracture zone and hydraulic pressure of aquifer, it reveals the influence law of the fault activation and water inrush under different working condition. Simulated results show that normal stress and shear stress from the interface of fault is greater than interface of the footwall by the corresponding stress under the same working condition; when the working face advance synchronous distance, the normal stress of fault decreases with increasing fault dip angle,shear stress within a certain range in the inclination increases with increasing angle; with the width of fault fracture increases, normal stress suffered by the interface of fault is larger and shear stress is smaller; normal stress and shear stress increase under interface of fault with the aquifer water pressure increases, and the bigger the water pressure, the greater the risk of water inrush.