| 发明名称 |
ROCK BOLTING METHOD AND ROCK BOLT |
| 摘要 |
<p>A method for providing a rock bolt ( 2 ) for rock bolting, wherein a rock bolt ( 2 ) having a tubular bolt portion ( 4 ) with a closed cross section is inserted and expanded for bearing contact in a bore hole ( 3 ) in a rock structure ( 1 ). The length of the tubular bolt portion ( 4 ) is determined such that maximum frictional force at pulling inside a bore hole ( 3 ) of a rock bolt with a tubular bolt portion with this length is below a predetermined maximum value. The invention also concerns a rock bolt.</p> |
| 申请公布号 |
EP1749144(B1) |
申请公布日期 |
2008.05.14 |
| 申请号 |
EP20050732230 |
申请日期 |
2005.04.18 |
| 申请人 |
ATLAS COPCO ROCK DRILLS AB |
发明人 |
OEBERG, FREDRIK;BUREAU, MARIO;CHARETTE, FRANCOIS |
| 分类号 |
E21D21/00;E21D;E21D21/02 |
主分类号 |
E21D21/00 |
| 代理机构 |
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