| 发明名称 |
Process and arrangement for the support of underground cavity systems by an efficient safety casing wall |
| 摘要 |
This invention relates to a method for bracing an underground cavity, wherein the cavity is lined with a tensionable layer, an expansible arch is then inserted against said layer, the arch is then tensioned and clamped in position to exert pressure in accordance with a specified formula.
|
| 申请公布号 |
US4505622(A) |
申请公布日期 |
1985.03.19 |
| 申请号 |
US19800155789 |
申请日期 |
1980.06.02 |
| 申请人 |
MAGYAR SZENBANYASZATI TROESZT |
发明人 |
ASSZONYI, CSABA;KLAUSZ, ISTVAN;KMETY, ISTVAN;MEITZEN, NANDOR;PASZTOR, REZSO |
| 分类号 |
B21F27/12;B21F27/20;E04C5/06;E21D11/10;E21D11/15;E21D11/40;(IPC1-7):E21D11/00 |
主分类号 |
B21F27/12 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
