能源地下储库造腔期流场相似实验  

Similar experiments of the flow field in cavity construction period of underground energy storage

作　　者：任松[1] 陈结[1] 姜德义 杨春和[1,2] 刘春[3] 

机构地区：[1]重庆大学煤矿灾害动力学与控制国家重点实验室,重庆400044 [2]中国科学院武汉岩土力学研究所,武汉430071 [3]重庆科技学院安全工程学院,重庆400042

出　　处：《重庆大学学报（自然科学版）》2012年第5期103-108,114,共7页Journal of Chongqing University

基　　金：国家重点基础研究发展计划(973计划)资助项目(2009CB724606);国家自然科学基金资助项目(51074198);中央高校基本科研业务费资助项目(CDJXS11241182;CDJZR10240017);国家创新研究群体基金资助项目(50921063);重庆市科委自然科学基金计划资助项目(CSTC2009BB6229;2010BB6044)

摘　　要：基于'选定物理法'搭建了模拟建腔期腔内流场的相似模型实验平台,并利用染色法研究了建腔期腔内流场运移规律。试验发现:反循环造腔时腔内流场可划为6个影响区,浮羽流区、对流扩散区、缓冲扩散区、饱和沉淀区、边界溶蚀区和瀑布流区;注入水的作用范围及扩散速度随注水流量的增大而增加,但注水流量变化不改变注入水运动趋势;套管间距的变化将引起注入淡水的作用区域的改变,注入淡水作用区域随套管的提升而向上移,促进上部盐岩的溶解;夹层赋存状态不仅会改变注入水流动状态,还会改变边界质量流流动状态,夹层数量移,腔内卤水运动状态与浓度分布也越复杂;随着腔体形状的扩展,腔内流场及浓度场相对作用范围变小,促使注入水作用范围逐步上移。A similar model experimental platform of flow field in construction period of salt caverns is established based on the similar theory of ＂selected laws of physics＂. The movement rule of flow field in cavity construction period is analyzed by systematic experiments with staining. It finds that the brine migration in reverse circulation of cavity construction can be divided into 6 role zones： buoyant plume zone, convection-diffusion zone, buffer diffusion zone, saturated precipitation zone, border dissolution zone and waterfall flow zone. The increase of water injection flow rate accelerates its influence scope and spread speed, but the brine＇s movement trend cannot be changed. The change of tube pitch and its spatial location changes the influence scope of water injection flow. Promoting the tube pitch makes the influence scope of fresh water upward, which accelerates the dissolution of upper salt rock. Interlayer changes not only thestate of water injection flow, but also the state of boundary mass flow. The more the number of sandwich, the more complex the motion state and the concentration distribution of brine are. With the expansion of the cavity, the relative influence scope of the injection flow and the boundary mass flow become small, and injection water flow＇s influence scope gradually goes upward.

关 键 词：相似模型 染色法 流场 盐岩 夹层 

分 类 号：TD853.34[矿业工程—金属矿开采]