摘要
为探究升富矿斜井冻结温度场发展规律,预测确定明挖段开挖时间,基于冻结管实际成孔位置和传热相关理论,结合土体热物理学参数,利用COMSOL MultiphysicsR模拟软件对明挖段不同层位土体温度场发展进行分析。研究结果表明:冻结初期,中砂层温度下降速率较快且冻结壁交圈时间早于细砂层;冻结中期,中砂层位冻结壁发展优于细砂层,但到后期,两者冻结指标差值逐渐缩小;冻结60 d后,侧帮和底板冻结壁有效厚度和平均温度满足设计要求,为控制冻结成本,可以选择60 d后开挖进行井筒施工。
In order to explore the development law of freezing temperature field in the main inclined shaft of Shengfu Mine and predict the excavation time of open-cut section,COMSOL MultiphysicsRsimulation software was used to analyze the development of soil temperature field at different levels of open-cut section based on the theory of actual hole formation position of freezing pipe and heat transfer,combined with the soil thermal physics parameters.The results showed that in the early freezing period,the temperature of the middle sand layer dropped faster and the time of freezing wall crossing was earlier than that of the fine sand layer;in the middle period of freezing,the development of the freezing wall of the middle sand layer was better than that of the fine sand layer,but the difference of the freezing index between the two decreased gradually in the later period;after 60 d of freezing,the effective thickness and average temperature of the freezing wall of the side and bottom plate met the design requirements;in order to control the freezing cost,the shaft construction can be excavated after 60 d.
作者
亓燕秋
王彬
梁沈伟
QI Yanqiu;WANG Bin;LIANG Shenwei(China Coal Special Drilling Co.,Ltd.,Hefei 230001,Anhui,China;China Coal Mine Construction Group Co.,Ltd.,Hefei 230001,Anhui,China;National Engineering Research Center for Deep Mine Construction Technology,Beijing 100020,China;Anhui Special Drilling Engineering Technology Research Center,Hefei 230001,Anhui,China;School of Civil Engineering and Architecture,Anhui University of Science&Technology,Huainan 232001,Anhui,China)
出处
《能源与节能》
2024年第9期6-9,共4页
Energy and Energy Conservation
关键词
人工地层冻结
斜井
温度场
数值计算
预测分析
artificial formation freezing
inclined shaft
temperature field
numerical calculation
predictive analysis
作者简介
第一作者:亓燕秋(1984-),男,安徽临泉人,硕士,工程师,主要从事特殊法凿井(冻结、钻井)及土建相关研究与施工管理工作;通信作者:王彬(1991-),男,山东临沂人,博士(后),副教授,主要从事人工地层冻结相关研究。
