离散裂隙网络模型在矿井涌水量预测中的应用

Application of Discrete Fracture Network Model to Mine Water Inflow Prediction

裂隙介质的渗透性往往具有各向异性和非均质性,为了体现矿山水文地质模型这种特征,论文从单裂隙渗流规律出发,在MATLAB软件环境中应用Monte-Carlo法的原理编译了二维离散裂隙网络模型的生成程序。在此基础上,结合边界元法对其进行二次开发,编译了二维离散裂隙网络渗流程序。应用该渗流程序对宜昌七里冲磷矿区进行了地下水渗流模拟,计算了220水平巷道单宽涌水量。计算结果与现场水文地质试验结果基本一致,表明该渗流程序具有较好的适用性,可以为相似水文地质条件矿区的矿坑涌水量提供一种快速廉价的获取方法。

The permeability of fracture rock tends to be anisotropic and heterogeneous.To reflect the characteristic of the hydrogeological model,this paper compiled the generation process of the2-D discrete fracture network in MATLAB software based on the seepage law of the single fracture and Monte-Carlo method.Then,combined with boundary element method,we made it a further development,which was the two-dimensional discrete fracture network seepage program.Finally,it was used to simulating the groundwater seepage field of Qilichong mining area.After the simulation of groundwater seepage field,the unit water inflow of the220horizontal tunnel was worked out,the results were basically the same as that with the field pressure water test.It indicates that the method has a preferable applicability,and can provide a quick and cheap method for the mine water inflow in the similar hydrogeological conditions’mining area.