BE725517A - - Google Patents
Info
- Publication number
- BE725517A BE725517A BE725517DA BE725517A BE 725517 A BE725517 A BE 725517A BE 725517D A BE725517D A BE 725517DA BE 725517 A BE725517 A BE 725517A
- Authority
- BE
- Belgium
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
- E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices
- E21D23/0078—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices with individual shifting devices
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)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Support Of The Bearing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19681583800 DE1583800A1 (de) | 1968-02-29 | 1968-02-29 | Rueckvorrichtung fuer hydraulische Ausbaueinheiten |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE725517A true BE725517A (fr) | 1969-05-29 |
Family
ID=5679560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE725517D BE725517A (fr) | 1968-02-29 | 1968-12-16 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE725517A (fr) |
| ES (1) | ES362787A1 (fr) |
| FR (1) | FR1597857A (fr) |
| GB (1) | GB1248967A (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112597677B (zh) * | 2020-12-11 | 2022-12-27 | 重庆大学 | 一种判断煤矿掘进工作面最大控顶距的方法 |
-
1968
- 1968-12-02 GB GB5712368A patent/GB1248967A/en not_active Expired
- 1968-12-16 BE BE725517D patent/BE725517A/xx unknown
- 1968-12-16 FR FR1597857D patent/FR1597857A/fr not_active Expired
-
1969
- 1969-01-21 ES ES362787A patent/ES362787A1/es not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1248967A (en) | 1971-10-06 |
| ES362787A1 (es) | 1970-11-16 |
| FR1597857A (fr) | 1970-06-29 |