FR951477A - étançon de mine - Google Patents
étançon de mineInfo
- Publication number
- FR951477A FR951477A FR951477DA FR951477A FR 951477 A FR951477 A FR 951477A FR 951477D A FR951477D A FR 951477DA FR 951477 A FR951477 A FR 951477A
- Authority
- FR
- France
- Prior art keywords
- mine prop
- prop
- mine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
- E21D17/082—Cap joints for obtaining a coal-face free of pit-props of sliding 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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE951477X | 1942-04-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR951477A true FR951477A (fr) | 1949-10-26 |
Family
ID=6918281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR951477D Expired FR951477A (fr) | 1942-04-09 | 1944-04-27 | étançon de mine |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR951477A (fr) |
-
1944
- 1944-04-27 FR FR951477D patent/FR951477A/fr not_active Expired
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