多圈管冻结模型试验及水热耦合数学模型研究  

Study on model experiment with multi-freezing-tube cycles and the mathematic model of moisture-heat coupling in frozen soil

作　　者：汪仁和[1] 李栋伟[1] 

机构地区：[1]安徽理工大学土木建筑学院

出　　处：《合肥工业大学学报（自然科学版）》2007年第11期1481-1484,1519,共5页Journal of Hefei University of Technology：Natural Science

基　　金：安徽省自然科学基金资助项目(050440501)

摘　　要：根据相似理论推导出人工冻结温度场和水分场模型试验相似准则。以淮南某煤矿风井井筒工程条件为背景，进行了人工多圈管冻结模型试验，获得冻结壁形成过程中，温度场和水分场的变化规律；证实了温度梯度是引起人工正冻土中水分迁移的主要原因，推导了水热耦合控制微分方程。研究结果表明：位于冻结锋面处水分迁移最激烈；在冻结区内水分不发生迁移；冻结壁内部含水量为非均匀，靠近冻结管位置含水量增加，两圈冻结管之间水分迁移量最大，达到7％～10％；内圈冻结管和外圈冻结管含水量增加8％～12％。The similarity criteria of the artificial freeze temperature field（TF） and moisture field（MF） are inferred. By taking the air shaft engineering condition of a coal mine in Huainan as the research ob- ject, a model experiment is made on the artificial multi-freezing-tube cycles, and the change rules of the TF and MF in the freeze wall formingprocess are obtained. The differential equations of moisture- heat coupling control are deduced. The study results show that the gradient of temperature is the main cause of moisture migration（MM） in the artificial frozen soil. MM is most intense on the freezing face, but there is no migration in the frozen area. Moisture is non-isotropic in the freeze wall interior, it increases in the position near the freeze tube,and/VIM is biggest between two frozen tubes,reaching 7%-10%. The moisture in the areas near the inner circle and outside the outer circle of the freezing tubes increases by 8%-12%.

关 键 词：多圈冻结管 温度场 水分场 水热耦合 

分 类 号：TD853.34[矿业工程—金属矿开采]