任意形冒落非均质采空区流场流态数值模拟

为研究冒落非均质采空区流场流态及其随边界条件的变化，基于多孔介质渗流方程建立了采空区漏风流态的有限元数值模型，结合现场实例，从宏观上描绘了复杂几何形状采空区的漏风流态（风压分布等值线和流函数线），给出更准确的流态图形分布解．指出用流函数Laplace方程修正函数，对复杂形状和沿多边界方向非均质的采空区流场计算，仍能满足流网正交，其正交性可通过剖分网格精度来控制，得到采空区漏风强度沿固壁边界附近的冒落非压实区相对较大，工作面上下端附近处的漏风强度很大，并直通采空区深部。

NUMERICAL SIMULATION OF FLOW PATTERN OF CAVING FLOW FIELD IN THE INHOMOGENEOUS GOAF WITH ARBITRARY SHAPE

To study the variations of airflow in the goaf flow field with various boundary conditions, a finite element numerical model is established to compute the flow pattern of caving goaf based on flow equation for air leakage in heterogeneous porous media. Combined with in-situ cases, the seepage flow patterns of air leakage in goafs with complicated shapes are described, and an accurate graph distribution solution of flow pattern is given. Flow pattern computation is carried out by using a modified function of stream function Laplace equation proposed by the author, and the flow fields of heterogeneous goals with complicated shapes and along the boundary direction can meet the condition of orthogonality of flow net, and at the same time the orthogonality can be controlled by the precision of split meshes. A conclusion is drawn that the air leakage intensity of goal along the caving uncompacted zones around solid wall boundary is relatively large, namely, the air leakage intensity of two ends of working face is large, and the flow lines can be extended to the deep parts of goaf.