地下水作用下人工地层冻结法单圈冻结孔优化布置方法研究  

Study on Optimal Layout of Single Circle Freezing Hole in Artificial Ground Freezing Method under Action of Groundwater

作　　者：杨凡 YANG Fan(Coal Industry Hefei Design and Research Institute Co.,Ltd.,Hefei 230001,China)

机构地区：[1]煤炭工业合肥设计研究院有限责任公司,合肥230001

出　　处：《煤炭技术》2022年第3期83-86,共4页Coal Technology

摘　　要：为了解决地下水作用下人工冻结壁交圈时间增加甚至无法交圈的工程问题,考虑水流与传热的相互作用。拟在冻结管的上游位置增加1排冻结管对冻结方案进行优化设计,采用COMSOL分析软件,建立热流耦合模型,对优化后的冻结方案展开研究,分析在不同的地下水流速下,增加的冻结管与井筒中心距离的不同,冻结温度场的发展变化规律。结果发现:增加的冻结管与井筒中心的距离越远,冻结壁交圈时间越短,上游冻结壁的厚度越厚。In order to solve the engineering problem that the time of artificial freezing wall circle is increasing or even unable to circle under the action of groundwater,the interaction between water flow and heat transfer is considered.It is proposed to add a row of freezing pipes at the upstream of the freezing pipe to optimize the freezing scheme.The COMSOL analysis software is used to establish the heat flow coupling model to study the optimized freezing scheme,and analyze the different distance between the increased freezing pipe and the shaft center and the development and change law of freezing temperature field under different groundwater flow velocity.The results show that the farther the distance between the increased freezing pipe and the center of the shaft is,the shorter the circle time of the freezing wall is,and the thicker the upstream freezing wall is.

关 键 词：冻结法凿井 数值计算 冻结壁 温度场 

分 类 号：TD265[矿业工程—矿井建设]