There has been a trend in recent years in performing the initial formation freezing using liquid nitrogen (LIN) and then converting the system to circulating refrigerated brine. While proponents of this method state it decreases freezing time, it can also be considered an alternative to inadequate refrigeration capacity.
Read MoreTBM Repair Using Liquid Nitrogen
During tunnel mining operations under the Fraser River in Vancouver, the Tunnel Boring Machine (TBM) was damaged and required immediate repair. Liquid nitrogen was used to freeze the soil at the cutter head so repairs could be completed.
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