| 发明名称 |
Method of rock bolting and tube-formed expansion bolt |
| 摘要 |
A tube-formed rockbolt is partly circular in its cross-section and opposite its circular portion (12) it has a deep depression (16-18). Its ends are sealed and its outer end has a hole (44, 45) or a fitting (24) through which the bolt can be supplied with high pressure water that expands the tube to anchor it in the borehole.
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| 申请公布号 |
US4459067(A) |
申请公布日期 |
1984.07.10 |
| 申请号 |
US19800127776 |
申请日期 |
1980.03.06 |
| 申请人 |
ATLAS COPCO AKTIEBOLAG |
发明人 |
SKOGBERG, BO T.;ROMELL, GUNNAR V. R. |
| 分类号 |
F16B13/04;E02D5/80;E21D20/00;E21D21/00;F16L58/08;(IPC1-7):E21D20/00 |
主分类号 |
F16B13/04 |
| 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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