To extract minerals, while protecting neighboring bodies of water and preventing inflows of groundwater to the mine excavation, a frozen earth barrier was constructed around the perimeter of the proposed Aquarius open pit gold mine in Timmins, Ontario.
Read MoreGround Freezing for Tunnel Support
This paper discusses the construction approach to using ground freezing for the first time to freeze a substantial length of tunnel for TBM mining. Techniques including the complex drilling program, aluminum refrigeration pipes, and instrumentation are discussed. Read More
Investigative and remedial methods for a frozen shaft breach
Ground freezing was used for excavation support and groundwater control of a 13 m diameter 61 m deep drop shaft for the South Bay Ocean Outfall Tunnel in San Diego, CA. During the shaft excavation process, external piezometer readings indicated a sudden drop in groundwater levels…The use of investigative methods and remedial actions were able to overcome these adverse conditions resulting in a successful ground freezing project.
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