CAJ | 학술논문

局部保温冻结技术可解决冻结法在深井开拓工程中遇到的诸多技术问题，并可节约大量冷量。为获得保温材料特性对冻结温度场的影响规律，以外加套管的单管局部保温冻结温度场为研究对象，首先，将相似理论与理论分析相结合，导出了单管局部保温冻结温度场的无量纲数学模型及相应的准则表达式；其次，以无量纲准则作为影响因素，结合数值计算和模拟试验，研究了冻结管采用发泡材料保温条件下的单管局部冻结问题。分析获得了冻结管热流密度与保温材料的比热容、导热系数、保温层外半径等无量纲因素间的关系，提出局部保温冻结工程中保温材料导热系数最佳选用范围应不大于0.035(无量纲)，保温层外半径宜为1.4~1.6(无量纲)之间。研究结果具有广泛的适用性，为局部保温技术的设计和应用提供了理论基础和便利条件。
국부보온동결기술가해결동결법재심정개탁공정중우도적제다기술문제，병가절약대량랭량。위획득보온재료특성대동결온도장적영향규률，이외가투관적단관국부보온동결온도장위연구대상，수선，장상사이론여이론분석상결합，도출료단관국부보온동결온도장적무량강수학모형급상응적준칙표체식；기차，이무량강준칙작위영향인소，결합수치계산화모의시험，연구료동결관채용발포재료보온조건하적단관국부동결문제。분석획득료동결관열류밀도여보온재료적비열용、도열계수、보온층외반경등무량강인소간적관계，제출국부보온동결공정중보온재료도열계수최가선용범위응불대우0.035(무량강)，보온층외반경의위1.4~1.6(무량강)지간。연구결과구유엄범적괄용성，위국부보온기술적설계화응용제공료이론기출화편리조건。
Technology of partial insulation can solve challenging problems when freeze sinking meth-od is applied into the deep shaft sinking project, and it can also save a large amount of cold energy. The partial insulation freezing temperature field of single pipe has been used as research object, in order to obtain the effect law of heat preservation material characteristics on the temperature field. Firstly, com-bined with the method of similarity theory and theoretical research, the dimensionless mathematical model and criterion of corresponding expression which attributed to the single pipe freezing temperature field have been derived. Secondly, combined with numerical calculation and simulation test, single pipe partial freezing problems have been studied under the condition of foam material freezing pipe, with the dimensionless criteria being used as influencing factors. The relationships between freezing-pipe di-mensionless heat flux and specific heat,conductive coefficient,outer radius of insulating material have been obtained. The optimum selection range of conductive coefficient should be no greater than 0.035 <br> (dimensionless), and the outer radius of insulating material should be at 1.4~1.6 (dimensionless). The conclusion can be widely applied to frozen engineering fields. It provides a theoretical foundation and convenient conditions for the design and application in the freeze sinking projects.