三角形布管方式下渗流速度对冻结发展规律影响分析  

Analysis on Seepage Velocity under Triangle Pipe Arrangement Effected to Ground Freezing Development Law

作　　者：孙桃 荣传新[1] 王彬[1] 孙世成 龙伟 张世琪 SUN Tao;RONG Chuanxin;WANG Bin;SUN Shicheng;LONG Wei;ZHANG Shiqi(School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001

出　　处：《建井技术》2022年第4期54-59,共6页Mine Construction Technology

基　　金：国家自然科学基金项目(51374010,51878005)。

摘　　要：为了研究渗流速度在冻结管三角形不同排布方式下对冻结帷幕形成规律的影响,基于建立的水热耦合数值模型,分别对冻结管排布间距L为0.2、0.3、0.4 m进行数值模拟,分析不同间距情况下,渗流速度对冻结帷幕交圈时间和平均温度的影响。结果表明:随着冻结管排布间距L的增大,冻结帷幕的交圈时间持续增加,渗流速度越大,冻结帷幕发展越缓慢,交圈时间变长,且冻结管排布间距L对冻结帷幕交圈时间的影响要大于渗流速度对冻结帷幕交圈时间的影响;随着流速增大,形成的冻结帷幕面积减小;随着流速的增大冻结帷幕的平均温度逐渐升高,0~-16℃范围内的冻结区域面积比例增加,低于-16℃范围内的冻结区域面积比例减小。In order to study a seepage velocity under different triangle arrangement of the freezing pipes effected to a formation law of the freezing curtain,based on the establishment of the hydrothermal coupling numerical model,the numerical simulations were conducted individually on the freezing pipe arrangements with a space L of 0.2 m,0.3 m and 0.4 m and under the different space condition,the analysis was conducted on the seepage velocity effected on the freezing curtain completed time and the average temperature.The results showed that with the space L between the freezing pipe arrangements increased,the freezing curtain completed time continuously increased,the seepage vel-ocity was more fast,the development of the freezing curtain would be more slow and the curtain completed time would be longer and the effect to the space L of the freezing pipe arrangement was higher than the effect of the seepage velocity to the freezing curtain completed time.With the velocity increased,the formed area of the freezing curtain would be reduced.With the velocity increased,the average temperature of the freezing curtain would gradually increased.Within the temperature ranging from 0~-16℃,the area ratio of the freezing district would be increased.Within the temperature lower than-16℃,the area ratio of the freezing area would be reduced.

关 键 词：人工冻结 水热耦合 数值模拟 三角形布管方式 渗流速度 

分 类 号：TD265.33[矿业工程—矿井建设]