PL219868A1 - - Google Patents
Info
- Publication number
- PL219868A1 PL219868A1 PL21986879A PL21986879A PL219868A1 PL 219868 A1 PL219868 A1 PL 219868A1 PL 21986879 A PL21986879 A PL 21986879A PL 21986879 A PL21986879 A PL 21986879A PL 219868 A1 PL219868 A1 PL 219868A1
- 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
-
- 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
- E21D23/06—Special mine caps or special tops of pit-props for permitting step-by-step movement
- E21D23/063—Retractable cantilever extensions therefor
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)
- Architecture (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Lining And Supports For Tunnels (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL21986879A PL123664B1 (en) | 1979-11-23 | 1979-11-23 | Wall cavity lining |
| GB8033874A GB2063976A (en) | 1979-11-23 | 1980-10-21 | Mine Roof Support Unit for Longwall Recesses |
| DE19803041929 DE3041929A1 (en) | 1979-11-23 | 1980-11-06 | MINING NICHE SCREW CONSTRUCTION |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL21986879A PL123664B1 (en) | 1979-11-23 | 1979-11-23 | Wall cavity lining |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PL219868A1 true PL219868A1 (en) | 1981-06-19 |
| PL123664B1 PL123664B1 (en) | 1982-11-30 |
Family
ID=19999613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL21986879A PL123664B1 (en) | 1979-11-23 | 1979-11-23 | Wall cavity lining |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE3041929A1 (en) |
| GB (1) | GB2063976A (en) |
| PL (1) | PL123664B1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2127885B (en) * | 1982-09-24 | 1986-02-26 | Dobson Park Ind | Mine roof support |
| GB8707235D0 (en) * | 1987-03-26 | 1987-04-29 | Dowty Hucknall Ltd | Roof support |
| CN101985887B (en) * | 2010-09-14 | 2012-07-04 | 中国矿业大学 | End supporting, filling and transshipping system of coal face |
| CN104533492B (en) * | 2014-12-29 | 2017-05-17 | 张海童 | Temporary supporting hydraulic support of tunneling working face |
| CN113653523B (en) * | 2021-09-22 | 2023-09-12 | 中国煤炭科工集团太原研究院有限公司 | Triangular-area wide temporary support device and support method for quickly withdrawing hydraulic support |
-
1979
- 1979-11-23 PL PL21986879A patent/PL123664B1/en unknown
-
1980
- 1980-10-21 GB GB8033874A patent/GB2063976A/en not_active Withdrawn
- 1980-11-06 DE DE19803041929 patent/DE3041929A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| GB2063976A (en) | 1981-06-10 |
| DE3041929A1 (en) | 1981-05-27 |
| PL123664B1 (en) | 1982-11-30 |