基于子域解析元素法的煤矿疏降水量预测研究

Prediction of coal mine dewatering rate based on subdomains-analytic element method

为分析子域解析元素法用于煤矿地下水流场模拟的可行性和精度,构建了基于子域解析元素法的煤矿地下水流场模型,并将该模型应用于煤矿疏降水量预测实例中,最后将模拟结果与Feflow模拟结果进行了对比分析,分析结果显示,在各疏降水控制孔位置与疏降水量相同的条件下,子域解析元素法模型与Feflow模型中各带压疏降水孔水位均降至临界安全水位以下所需的时间分别是57d与60d,并且各观测孔在疏降水后的水位均降至临界安全水位以下。研究结果表明,子域解析元素法用于煤矿地下水流场模拟可行且精度可控,是煤矿地下水流场模拟方法的有益补充。

In order to analyze the feasibility and accuracy of the subdomains-analytic element method used in simulation of coal mine groundwater flow field,a coal mine groundwater flow field model was constructed based on the principle of the subdomains-analytic element method,which was applied to an example of coal mine dewatering rate prediction,the simulation results were compared with that of Feflow.The result shows that the head of each drainage hole predicted by the subdomains-analytical element method and Feflow falls below the critical safety head in 57 days and 60 days,respectively,and the head of each observation hole falls below the critical safety head after drainage,on the condition that the location and dewatering rate of each drainage hole in the subdomains-analytic element method model is the same as that of in the Feflow model.The results reveal that the subdomains-analytic element method is feasible and precision controllable in the simulation of groundwater flow field of coal mine.It is a useful supplement to simulation methods of groundwater flow field of coal mine.