渗透系数各向异性对地下水封洞室涌水量影响的数值模拟分析  

Effect analysis of hydraulic conductivity anisotropy on hydraulic discharge of groundwater sealed caverns using numerical simulation method

作　　者：周鹏鹏[1] 李国敏[1] 石景熙 时公玉 巫润建[1] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029 [2]北京飞燕石化环保科技发展有限公司,北京102500

出　　处：《工程勘察》2011年第5期36-40,共5页Geotechnical Investigation & Surveying

基　　金：环保公益性行业科研专项(200709055);北京市科技计划项目(D07050601510000)

摘　　要：为了分析洞室涌水量,本文运用数值模拟技术建立了研究区地下水的三维数值模型。在模型中综合考虑了基岩裂隙含水介质渗透系数(K)的各向异性,应用水均衡计算分析了不同Kv/Kh比值条件对洞室涌水量的影响。结果表明:随着Kv/Kh比值增加,洞室涌水量也相应有所增加;Kv/Kh比值的变化对洞室涌水量的变化趋势影响不明显;不同Kv/Kh比值条件下,初期涌水量平均增加速率较为一致,而后随着时间的推移,增加速率出现分异,Kv/Kh比值越大,涌水量增加速率越小;运营期Kv/Kh比值的增加对涌水量的影响较施工期明显。To analyse the hydraulic discharge of groundwater sealed caverns,the study area as a three-dimensional groundwater flow model using numerical simulation method is created.In the model,the hydraulic conductivity anisotropy of fissure aquifer medium is comprehensively considered and the influence of different Kv /Kh ratios to the hydraulic discharge of the caverns through analyzing water equilibrium is analyzed.The results reveals that the hydraulic discharge of the caverns increases with the increase of the Kv /Kh ratio;the variation of the Kv /Kh ratio has little effect to the trend of the hydraulic discharge;under different Kv /Kh ratio conditions,the average increase rate of hydraulic discharge in early time is more consistent.Then,the increase rate of different Kv /Kh ratio conditions becomes different.The larger the Kv / Kh ratio is,the smaller the average increase rate of hydraulic discharge is.The influence of Kv /Kh ratio increasing in operation period is more obvious than that in excavating period.

关 键 词：各向异性 数值模拟 地下水封洞室 

分 类 号：TV223.4[水利工程—水工结构工程] P641.2[天文地球—地质矿产勘探]