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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。
Describe the dynamic process of water wetting by using unsaturated and saturated three-dimensional unsteady seepage mathematical model and solve it by finite element numerical solution. It is considered that the wetting of coal body flooding approximates to the saturated model, and the relationship between the water storage coefficient, water conducting coefficient and wetting pressure in the wetting process is constructed. Among them, the parameters were identified by using the optimization algorithm and the field water injection test results obtained by inverse fitting. The calculation results show that the simulated wetting state is in accordance with the wetting condition of waterflooding coal seam. This method can be used to solve the parameters of water injection in coal seams, optimize the design of process schemes and predict the wetting distribution and dynamic change of water injection in coal seams.