煤层注水湿润分布状态的数值模拟

Numerical Modeling of Water Distribution of infusion in Coal Seams

用非饱和———饱和三维非稳定渗流数学模型描述煤层注水湿润的动态过程，用有限元数值解法求解。认为煤体注水湿润近似符合饱和模型，构造了湿润过程中煤体贮水系数、导水系数与湿润压力关系。其中参数的识别采用了最优化算法与现场注水试验结果进行反求拟合获得。实例计算表明，模拟湿润状态符合注水煤层的湿润情况。这一方法，可用于解决煤层注水的参数确定、工艺方案设计优化、预测煤层注水湿润分布状态及动态变化等问题。

A 3D nonsaturated saturated mathematical model of unstable seepage flow depicts the dynamic wetting process of infusion in seam,which was solved by finite-element method.The case study shows that the modeling of wetting state is consistent with the practical wetting state. So the method can be used to determine the infusion parameters,optimize the technological design scheme and predict water distribution of infusion and dynamic changes.