基于固流耦合理论的覆岩破坏特征及涌水量预计的数值模拟

通过FLAC^3D的流固耦合功能建立了计算模型，模拟了在多含水层及海水等大型水体条件下，煤层开采过程中顶板破坏场、孔隙水压力分布以及在动态开采中水流矢量分布.并在此基础上，通过FLAC^3D内置Fish函数，计算了开采过程中工作面最大涌水量.结果表明，随着开采形成的断裂带和含水层沟通，含水层水向采空区渗入，在前方煤壁处发生突水，并计算得到工作面最大涌水量为15.5 m³/h.

Numerical simulation on forecasting water inflow and characteristic of overburden failure based on fluid-solid coupling theory

The numerical model was built through the coupling function of FLAC3D. In the condition of more aquifers and sea, the failure field of roof, pore water pressure distribution and flow vector distribution were simulated in the process of mining. On this basis, through FLAC3D built in Fish functions, the max water inflow was computed. The results indicate that water seeps into the gob along with the crack zone connecting the aquifer, and onrush water happens in coalface. The max water inflow is 15.5 m3/h through calculating.