【摘要】 针对冒落采空区通风比较复杂的问题,基于非均质多孔介质漏风渗流方程建立了冒落采空区漏风流态的有限元数值模型,结合现场实例,对W形通风复杂边界形式的采空区风流规律进行了求解。从理论上描绘了W形通风采空区的风压分布等值线和流函数线(分布解),该计算方案对W形通风复杂边界条件仍能满足流网正交;求解方便迅速,可操作性好。指出W形通风采空区明显降低工作面两端风压差,缩小漏风范围的效果。更多还原

【Abstract】 In view of the problem of the complex ventilation in the caving goaf in the caving finite element numerical model of air leakage flow pattern in the caving goaf is established based on the air leakage seepage equation against heterogeneous porous medium.Goaf air flow law for W type ventilation complex boundary is solved.Wind pressure distribution contour and stream function(distribution solution) of the W type ventilation goaf is described theoretically,whose flow net still meets orthogonal for W model ventilation complex boundary condition;this solution method is convenient and rapid,easy to operate.It is indicated that W type ventilation goaf reduces the pressure difference between working face ends,and narrows air leakage range.更多还原