发明名称 |
A METHOD OF ROCK BOLTING, AND A DEVICE, AND A ROOF BOLTING APPARATUS |
摘要 |
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). |
申请公布号 |
DE3466268(D1) |
申请公布日期 |
1987.10.22 |
申请号 |
DE19843466268 |
申请日期 |
1984.04.12 |
申请人 |
ATLAS COPCO AKTIEBOLAG |
发明人 |
LUNDMARK, SIGNAR EDVIN ALEXIS;PERSSON, KARL ENAR |
分类号 |
E21D20/00;E21D20/02;(IPC1-7):E21D20/02 |
主分类号 |
E21D20/00 |
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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