FIELD: mining. SUBSTANCE: device having anchor, ball washer and nut is characterized by the fact that its nut is of two-step type and its pressure step is hemispherical, and ball washer has the second spherical surface reverse to the first one. EFFECT: guaranteed clamping of anchor in borehole even with borehole axis nonsquare to rock mass surface. 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| ANCHOR TIGHTENING DEVICE | 2001 |
|
RU2212540C2 |
| METHOD FOR ANCHOR FIXING IN MASS | 1999 |
|
RU2173746C2 |
| ANCHOR LOCK | 1999 |
|
RU2166092C1 |
| BOLTING FOR MINE WORKING AND METHOD OF ITS MANUFACTURING | 2006 |
|
RU2337242C2 |
| DEVICE FOR MEASURING DEFORMATIONS IN WELL WALLS | 2006 |
|
RU2301332C1 |
| PELLET PRODUCTION METHOD | 2001 |
|
RU2183683C1 |
| CABLE ANCHOR | 1999 |
|
RU2178082C2 |
| CABLE ROOF BOLTING OF HIGH LOAD-BEARING CAPACITY | 2012 |
|
RU2505678C1 |
| METHOD FOR MOUNTING ANCHOR | 2003 |
|
RU2236595C1 |
| HARD METAL INSERT FOR CROWN BITS | 1999 |
|
RU2167993C1 |
