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发明名称
ICE CRIB
摘要
<p>ICE CRIB An ice crib for use in retreat mining to support the overburden is formed of fresh water ice, the freezing and melting of which is controlled in situ by flow therethrough of temperature regulated brine.</p>
申请公布号
CA1237905(A)
申请公布日期
1988.06.14
申请号
CA19850479563
申请日期
1985.04.19
申请人
ICEBERG CRIBS, INC.
发明人
KUCK, DAVID L.
分类号
E21D15/00;(IPC1-7):E21D15/00
主分类号
E21D15/00
代理机构
代理人
主权项
地址
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