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。
The major water supply in an open pit mine is atmos- pheric precipitation. The hydrogeological system of the mine is generalized as three-dimensional model of rainfall infihration. The groundwater infiltration model of mine area was buih by FE FLOW. The dynamic water infiltration process infiltrating from open pit to underground stope at 2%, rainstorm frequency were simulated The influence of the precipitation time on underground water gushing was investigated. The infiltrating time of overburden and the infiltration factors are researched based on the analysis of water conservation and un--infiltrating of overburden. The results show that without action of water containment and stagnation for the overburden from open pit to underground, the underground gushing at 2% rainstorm frequency is significantly larger than the water drainage capacity in the mine design and with action of water containment and stagnation for the overburden from open pit to underground in the proper structure, the designed water drain- age capacity can meet requirements for safety in water drainage with the water stagnation time for overburden being more than 10 hrs.
出处
《化工矿物与加工》
CAS
北大核心
2017年第1期27-32,40,共7页
Industrial Minerals & Processing
基金
河北省自然科学基金资助项目(编号:E2013209328)
