FR1105953A - Improvements to retaining elements for mine galleries - Google Patents
Improvements to retaining elements for mine galleriesInfo
- Publication number
- FR1105953A FR1105953A FR1105953DA FR1105953A FR 1105953 A FR1105953 A FR 1105953A FR 1105953D A FR1105953D A FR 1105953DA FR 1105953 A FR1105953 A FR 1105953A
- Authority
- FR
- France
- Prior art keywords
- retaining elements
- mine galleries
- galleries
- mine
- retaining
- 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
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/0052—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor with advancing shifting devices connected therewith
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 |
---|---|---|---|
FR1105953T | 1954-06-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR1105953A true FR1105953A (en) | 1955-12-09 |
Family
ID=9623674
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR1105953D Expired FR1105953A (en) | 1954-06-01 | 1954-06-01 | Improvements to retaining elements for mine galleries |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR1105953A (en) |
-
1954
- 1954-06-01 FR FR1105953D patent/FR1105953A/en not_active Expired
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