PL87849B1 - - Google Patents
Info
- Publication number
- PL87849B1 PL87849B1 PL16788974A PL16788974A PL87849B1 PL 87849 B1 PL87849 B1 PL 87849B1 PL 16788974 A PL16788974 A PL 16788974A PL 16788974 A PL16788974 A PL 16788974A PL 87849 B1 PL87849 B1 PL 87849B1
- Authority
- PL
- Poland
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
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
- E21D23/0481—Supports specially adapted for use in combination with the placing of filling-up materials
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Tents Or Canopies (AREA)
- Revetment (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL16788974A PL87849B1 (en) | 1974-01-02 | 1974-01-02 | |
| GB5390574A GB1472438A (en) | 1974-01-02 | 1974-12-13 | Mine stowing dam |
| DE19742461358 DE2461358C3 (en) | 1974-01-02 | 1974-12-24 | Offset shield for mechanical expansion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL16788974A PL87849B1 (en) | 1974-01-02 | 1974-01-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL87849B1 true PL87849B1 (en) | 1976-07-31 |
Family
ID=19965585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL16788974A PL87849B1 (en) | 1974-01-02 | 1974-01-02 |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB1472438A (en) |
| PL (1) | PL87849B1 (en) |
-
1974
- 1974-01-02 PL PL16788974A patent/PL87849B1/xx unknown
- 1974-12-13 GB GB5390574A patent/GB1472438A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2461358B2 (en) | 1977-04-28 |
| DE2461358A1 (en) | 1975-07-10 |
| GB1472438A (en) | 1977-05-04 |