基于FEFLOW的露天转地下覆盖层渗流分析

发布时间：2018-04-02 11:06

本文选题：地下水流模拟　切入点：数值模拟　出处：《化工矿物与加工》2017年01期

【摘要】：某矿区的主要补给水源为大气降水,将矿区水文地质系统概化为三维降雨入渗模型,利用FEFLOW构建矿区地下水流入渗分析模型,模拟2%暴雨频率条件下,露天矿坑汇积水入渗至地下采场的水流动态过程,探讨2%暴雨频率下持续降水时长对井下涌水量的影响,分析露天转地下覆盖层的涵水作用和滞水作用,研究覆盖层的滞水时长及其影响因素。数值分析结果表明,若无露天转地下覆盖层的迟滞水作用,2%暴雨频率下的井下涌水将远大于矿山设计排水能力;而在适当结构的露天转地下覆盖层的涵水和滞水作用下,设计排水能力将满足排水安全要求,覆盖层滞水时间大于10h。
[Abstract]:The main recharge water source of a mining area is atmospheric precipitation. The hydrogeological system of mining area is generalized as a three-dimensional rainfall infiltration model. The groundwater inflow and infiltration analysis model is constructed by using FEFLOW, and the 2% rainstorm frequency is simulated.In this paper, the dynamic process of water flow from catchment water in opencast pit to underground stope is discussed. The influence of the duration of continuous precipitation on underground water inflow under 2% rainstorm frequency is discussed, and the water culvert effect and water retention action of open pit to underground overburden are analyzed.The water lag time of overburden and its influencing factors are studied.The results of numerical analysis show that if there is no hysteretic effect of open pit to underground overburden and 2% rainstorm frequency, the underground water gushing will be much larger than the designed drainage capacity of mine, and under the action of culvert and stagnant water in the suitable structure of open pit to underground overburden,The design of drainage capacity will meet the requirement of drainage safety, and the water lag time of the overburden is more than 10 h.
【作者单位】：华北理工大学矿业工程学院;河北省矿业开发与安全技术实验室;
【基金】：河北省自然科学基金资助项目(编号:E2013209328)
【分类号】：TD74

【相似文献】