| 发明名称 |
METHOD OF ROCK BOLTING, AND A DEVICE, AND A ROOF BOLTING APPARATUS |
| 摘要 |
<p>: In roof bolting, when an anchor rod (24) is to be inserted in a borehole (26) in the rock, a cement grout is ejected as a jet from a nozzle (22) located at the mouth of the borehole to partially fill the hole before the rod is forced into the borehole. The jet of grout should have such a velocity that it reaches the bottom of the borehole. A grout pump (45, 60) forces the grout through a hose (28) to the nozzle (22).</p> |
| 申请公布号 |
CA1236987(A) |
申请公布日期 |
1988.05.24 |
| 申请号 |
CA19840455419 |
申请日期 |
1984.05.30 |
| 申请人 |
ATLAS COPCO AKTIEBOLAG |
发明人 |
LUNDMARK, SIGNAR E.A.;PERSSON, KARL E. |
| 分类号 |
E21D20/02;(IPC1-7):E21D20/02 |
主分类号 |
E21D20/02 |
| 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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