DD4818A - - Google Patents
Info
- Publication number
- DD4818A DD4818A DD4818DA DD4818A DD 4818 A DD4818 A DD 4818A DD 4818D A DD4818D A DD 4818DA DD 4818 A DD4818 A DD 4818A
- Authority
- DD
- German Democratic Republic
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
-
- 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
- E21D23/08—Advancing mechanisms
- E21D23/081—Advancing mechanisms forming parts of the roof supports
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)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DD4818A true DD4818A (en) |
Family
ID=217817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DD4818D DD4818A (en) |
Country Status (1)
| Country | Link |
|---|---|
| DD (1) | DD4818A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3408255A1 (en) * | 1983-03-08 | 1984-10-25 | Dobson Park Industries PLC, Nottingham | STREBAUSBAULELEEMENT FOR UNDERGROUND PIT OPERATION |
-
0
- DD DD4818D patent/DD4818A/xx unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3408255A1 (en) * | 1983-03-08 | 1984-10-25 | Dobson Park Industries PLC, Nottingham | STREBAUSBAULELEEMENT FOR UNDERGROUND PIT OPERATION |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4041715A (en) | Pit prop with liftable front end | |
| US4231684A (en) | Shield type support for use in underground mining with lemniscate guide rods | |
| US4147459A (en) | Shifting device connected with a longwall conveyor for a progressive timbering frame | |
| DE2850073C2 (en) | ||
| DE2650351A1 (en) | Connection between coal plough and mine support - has plate and L=shaped bracket connected to face conveyor frame and mine support floor member | |
| US4563111A (en) | Mine roof supports | |
| GB2087963B (en) | Shield supports suitable for use in mines | |
| DE3003806A1 (en) | Hydraulic mine shield support frame - has multiple inwardly foldable protruding roof cap, pref. with three sections | |
| DE3150411A1 (en) | Powered support assembly with auxiliary prop | |
| DD4818A (en) |