三相泡沫在综放工作面采空区渗流特性的数值模拟研究

摘要

为研究三相泡沫在采空区渗流范围特征,运用计算流体动力学理论建立了三相泡沫在采空区渗流的数学模型,模拟了三相泡沫在综放工作面采空区的渗流过程,得出了三相泡沫渗流范围的理论值,分析了三相泡沫渗流特性的主要影响因素。研究表明：模型特定边界条件下三相泡沫在采空区堆积高度为3.62 m,堆积最高点位于灌注预埋管出口的上方;三相泡沫沿采空区走向的覆盖宽度为36.9 m;三相泡沫的堆积高度和扩散宽度受煤层倾角和灌注流量的影响显著。%To study the characteristics of three-phase foam seepage in goaf,with computational fluid dynamics theory,constructed the mathematical model of three-phase foam seepage in goaf.The process of three-phase foam seepage in fully mechanized caving face goaf was simulated,gained the theoretical values of three-phase foam＇s flow scope and analyzed its influencing factors.Research shows that stack height of three-phase foam seepage in goaf is 3.62 m,and the highest point located in upside of pipe outlet.The covering width in strike direction is 36.9 m;stack height and covering width of three-phase foam are seriously influenced by dip of working face and flow volume of three-phase foam.