Abstract: The process of generating the freeze wall was simulated by a numerical method. The energy conservation equation to describe the heat transfer of oil shale and water was established, including the freezing of water. The configuration of the freeze wall was designed. The temperature decrease of the rock near the freeze well was calculated, and the temperature profiles were presented. As the freezing time passed, temperature variation of the underground oil shale was simulated numerically. The numerical results show that the frozen wall will be generated after 180 days of freezing. The minimum thickness of the freeze wall is 1.0 m. The results are the important references for determining the scheme of oil shale insitu conversion, and provide reliable data for the environmental assessment.

Key words: Freeze wall,    ,  Oil shale ,    , Insituconversion,    , Numerical simulation

摘要： 采用数值计算方法,模拟地下冷冻墙形成过程。以含水的油页岩为研究对象,建立热传导过程的能 量守恒方程,该方程包含水结冰时的热量传递过程。设计了冷冻墙施工方案,计算了冷冻井周围的岩石和水的温度下降过程,得到冷冻井周围的温度分布,地下油页岩温度随制冷时间的变化。计算结果表明,制冷时间180d时,可形成最小厚度为1.0m 的冷冻墙。

关键词: 冷冻墙,    , 油页岩,    , 地下原位开采,    , 数值模拟