发明名称 |
Method and apparatus for developing shafts using small diameter shafts |
摘要 |
A mining method and apparatus includes drilling two relatively small diameter shafts in proximity to each other, and operating a single hoisting system between the two shafts. The hoisting system includes a hoist that simultaneously moves first and second conveyances in opposite directions respectively in the first and second shafts.
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申请公布号 |
US5513903(A) |
申请公布日期 |
1996.05.07 |
申请号 |
US19940300215 |
申请日期 |
1994.09.06 |
申请人 |
DEEP SHAFT TECHNOLOGY, INC. |
发明人 |
MRAZ, DENNIS |
分类号 |
E21C41/16;E21D1/03;E21D7/02;(IPC1-7):E21D7/02 |
主分类号 |
E21C41/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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