千米凿井工作面注浆堵水三维数值模拟研究

3D numerical simulation research on blocking up water grouting at one thousand meters underground shaft sinking working face

针对安居煤矿井筒工作面涌水量大的问题,采用ABAQUS软件建立工作面注浆三维数值模型,利用有限元计算对注浆前后的孔隙水压力、孔隙水渗流速度以及井筒涌水量进行研究分析,结果表明,工作面注浆有效地封堵了破碎围岩中的孔隙,从而封堵了水力通道,降低了围岩的渗透能力,使围岩孔隙水压力基本保持原有的状态,减小了对围岩初始状态扰动,对井壁受力及地层稳定具有积极作用。

In view of the issue of big volume of water inrush at shaft sinking working face of Anju coal mine,a 3D numerical model is established by using of ABAQUS software.Calculated by using finite element,research and analysis are made on pore water pressure,seeping speed,and water inrush volume in the shaft before and after grouting.The result indicates that,working face grouting could block up pores among the fragmented surrounding rocks effectively,and hence block up water passages,reduce water infiltration capacity to the surrounding rocks,make the pore water pressure in the surrounding rocks keeping at its original state roughly and reduce disturbing to it.These could play a positive role on stabilizing shaft wall and stratum.