新型单层冻结井壁温度场相似模拟研究  

Curing Monolayer Freezing Shaft Lining

作　　者：陈晓祥[1] 杨维好[2] 

机构地区：[1]河南理工大学能源科学与工程学院,河南焦作454000 [2]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008

出　　处：《中国矿业大学学报》2010年第2期201-207,共7页Journal of China University of Mining & Technology

基　　金：国家科技支撑计划资助项目(2006BAB16B01);河南省重点学科项目(504906);河南省教育厅自然科学研究计划项目(2009B560004);河南理工大学博士基金项目(648234)

摘　　要：基于中国矿业大学的新型单层井壁结构,采用物理模拟方法研究了不同厚度、不同井帮温度条件下井壁内温度场发展规律,结果表明,新型单层井壁浇注后,温度迅速上升,井壁越厚,达到的最高温度就越高;专利井壁采用补偿收缩混凝土补偿了部分温差,井壁内外温差虽略微超过规范规定的最大控制温差(25℃),但井壁不会开裂;井壁内部高水化热使得井壁获得至少8d的全断面正温养护时间,井壁无冻害危险;井帮温度不同,相同厚度的井壁达到的最高温度不同;井壁越厚,井帮温度对井壁能达到的最高温度影响越小.利用龙固煤矿实测岩土参数进行的新型单层井壁物理模拟试验结果较好地验证了基于龙固外壁现场实测数据反演得到的水泥水化参数进行数值模拟的结果.Analog simulation was used to determine the temperature field in a curing concrete mono-layer freezing-shaft lining. The affect of different lining thickness and sidewall temperature was studied. The temperature is seen to rise rapidly after the pour and thicker linings result in higher peak temperatures. Shrinkage-compensating concrete is used to partially compensate for temperature differences developed in the lining. The temperature difference between the inside of the lining and the outside wall may slightly exceed the maximum allowable temperature of 25 ℃ stipulated by the standard. However the lining is unlikely to crack. High heat of hydration provides at least eight days of curing time at a positive temperature throughout the section and during this time the curing lining is free from the danger of freezing. For different sidewall temperatures the peak internal temperature of the lining will be different. Thicker linings show less effect from variation in sidewall temperature. Analog simulations based on in-situ measurements of rock and soil in the Longgu mine confirmed results from numerical simulations based on cement hydration parameters deduced from data taken at the Longgu outer shaft lining.

关 键 词：新型 单层 冻结井壁 温度场 相似模拟 

分 类 号：TD265.3[矿业工程—矿井建设]