采矿与安全工程学报Issue(2)：310-316,7.DOI:10.13545/j.cnki.jmse.2015.02.022
混凝土水化热对白垩系地层井壁与冻结壁温度影响的实测研究
Research on the effect of concrete heat of hydration on temperature of the outer wall and frozen wall in Cretaceous strata
摘要
Abstract
In the process of coal mine shaft freezing sinking construction in Cretaceous strata, through analyzing the monitored data of two representative horizontal layers, the basic law of the temperature variations of the outer wall and the freezing wall has been obtained. Research shows that the tempera-ture increases rapidly after the outer walls have been poured;the temperature of the two horizontal layer rises up to 68.4℃in 1.5 d, and the coarse sandstone’s temperature rising rate of hydration heat effect is faster than that of fine grained sandstone. Amount of hydration heat makes the positive temperature maintenance of the two monitoring levels longer, which can benefit concrete strength at its early growth of the out wall concrete. Meanwhile, the heat causes the frozen wall wide-range temperature rise and partial melting (melting depth reaching 305 mm), which causes negative impact on the strength of fro-zen wall. The analysis and investigation of the hydrated heat of concrete effection has instructive signif-icance to shaft freezing design and construction in Cretaceous strata.关键词
温度/水化热/冻结壁/外壁/监测Key words
temperature/heat of hydration/frozen wall/the outer wall/monitoring分类
矿业与冶金引用本文复制引用
李博融,奚家米,杨更社,陈新年,屈永龙..混凝土水化热对白垩系地层井壁与冻结壁温度影响的实测研究[J].采矿与安全工程学报,2015,(2):310-316,7.基金项目
国家自然科学基金项目(41272340)；陕西省自然科学基金项目(2011JM5002) （41272340）
