PL219276A1 - - Google Patents
Info
- Publication number
- PL219276A1 PL219276A1 PL21927679A PL21927679A PL219276A1 PL 219276 A1 PL219276 A1 PL 219276A1 PL 21927679 A PL21927679 A PL 21927679A PL 21927679 A PL21927679 A PL 21927679A PL 219276 A1 PL219276 A1 PL 219276A1
- 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
- E21D23/0004—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face
- E21D23/0034—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face comprising a goaf shield articulated to a base member
- E21D23/0043—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face comprising a goaf shield articulated to a base member and supported by two or more rows of struts parallel to the working face
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)
- Joining Of Building Structures In Genera (AREA)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL21927679A PL219276A1 (en) | 1979-10-26 | 1979-10-26 | |
| DE19803039577 DE3039577A1 (en) | 1979-10-26 | 1980-10-20 | PIT SHIELD REMOVAL |
| GB8034391A GB2061362A (en) | 1979-10-26 | 1980-10-24 | A shielding type mining wall lining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL21927679A PL219276A1 (en) | 1979-10-26 | 1979-10-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL219276A1 true PL219276A1 (en) | 1981-05-22 |
Family
ID=19999161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL21927679A PL219276A1 (en) | 1979-10-26 | 1979-10-26 |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE3039577A1 (en) |
| GB (1) | GB2061362A (en) |
| PL (1) | PL219276A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110295911A (en) * | 2019-06-24 | 2019-10-01 | 中国煤炭科工集团太原研究院有限公司 | The mobile air crossing equipment of the multi-functional recycling of one kind and air bridge construction method |
| CN110318332B (en) * | 2019-06-24 | 2021-05-14 | 中国煤炭科工集团太原研究院有限公司 | Coal mine underground crawler mobile air bridge device and using method |
-
1979
- 1979-10-26 PL PL21927679A patent/PL219276A1/xx unknown
-
1980
- 1980-10-20 DE DE19803039577 patent/DE3039577A1/en not_active Ceased
- 1980-10-24 GB GB8034391A patent/GB2061362A/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| GB2061362A (en) | 1981-05-13 |
| DE3039577A1 (en) | 1981-05-07 |