BE536990A - - Google Patents
Info
- Publication number
- BE536990A BE536990A BE536990DA BE536990A BE 536990 A BE536990 A BE 536990A BE 536990D A BE536990D A BE 536990DA BE 536990 A BE536990 A BE 536990A
- Authority
- BE
- Belgium
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D17/00—Caps for supporting mine roofs
- E21D17/02—Cantilever extension or similar protecting devices
- E21D17/08—Cap joints for obtaining a coal-face free of pit-props
- E21D17/086—Cap joints for obtaining a coal-face free of pit-props or articulated type
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB959854A GB775180A (en) | 1954-04-01 | 1954-04-01 | Improvements in or relating to roof bars for use in underground mines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE536990A true BE536990A (en(2012)) |
Family
ID=9875073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE536990D BE536990A (en(2012)) | 1954-04-01 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE536990A (en(2012)) |
| FR (1) | FR1131903A (en(2012)) |
| GB (1) | GB775180A (en(2012)) |
-
0
- BE BE536990D patent/BE536990A/xx unknown
-
1954
- 1954-04-01 GB GB959854A patent/GB775180A/en not_active Expired
-
1955
- 1955-04-01 FR FR1131903D patent/FR1131903A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1131903A (fr) | 1957-03-01 |
| GB775180A (en) | 1957-05-22 |