Abstract

The authors discuss artificial freezing of water-saturated rock mass during construction of mine shafts in terms of a simplified case of a single freezing pipe. The ice growing and holding stages are examined. Maintenance of a constant thickness frozen wall is simulated using the coolant temperature regulator model. The multi-criterion numerical modeling of freezing is implemented, and the time dependences are obtained for the coolant temperature at the ice holding stage. It is found that maintenance of the constant thickness of frozen wall requires that the coolant temperature in ice holding stage is exponentially increased at the power around –0.2. The ice growing stage temperature has no influence on the total energy efficiency of the freezing system.

中文翻译：

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冻结壁厚保持的工作条件选择和冻结管工作模式的证明

摘要

作者讨论了在矿井建设期间以单根冷冻管的简化情况为例，对含水饱和岩体进行人工冻结的问题。检查冰的生长和保持阶段。使用冷却液温度调节器模型模拟了恒定厚度的冻结壁的维护。实现了冻结的多准则数值模型，并获得了在制冰阶段冷却剂温度的时间依赖性。已经发现，要保持恒定厚度的冷冻壁，就需要在保冰阶段中的冷却剂温度以–0.2左右的功率呈指数增加。制冰阶段的温度对冷冻系统的总能量效率没有影响。