导水裂缝带部分波及顶板含水层条件下涌水量预测

Prediction of water inflow in roof aquifer affected by water-flowing fracture zone

针对煤层顶板导水裂缝带部分波及含水层时涌水量预测不准确问题,通过对煤层回采后顶板水文地质条件变化、顶板含水层地下水渗流场变化进行分析,建立工作面水文地质概念模型,得出了基于达西定律和承压水Dupuit理论的顶部进水型涌水量预测模型。通过对数学模型的分析论证,并将此涌水量数学模型应用于实际生产,得出涌水量预测模型概化合理,符合煤层开采实际情况下水文地质条件,对于顶板导水裂缝带部分波及含水层情况下工作面涌水量预测有借鉴意义。

Aiming at the inaccuracy of water inflow prediction in roof aquifer affected by water-flowing fracturezone, through analyzing the change of hydrogeological conditions and groundwater seepage field after extraction, ahydrogeological conceptual model of working face was set up, a model based on the Darcy’s law and J.Dupuitformula for prediction of top water-intake inflow in roof aquifer. Through analyzing the mathematical model andapplication of the model, it was proved that the conceptualization of the model was reasonable and accorded withthe hydrogeological conditions during coal mining. It has reference significance for water inflow prediction in roofaquifer affected by water-flowing fracture zone.