BE517367A - - Google Patents
Info
- Publication number
- BE517367A BE517367A BE517367DA BE517367A BE 517367 A BE517367 A BE 517367A BE 517367D A BE517367D A BE 517367DA BE 517367 A BE517367 A BE 517367A
- Authority
- BE
- Belgium
- Prior art keywords
- props
- roof
- series
- bar
- wall
- Prior art date
Links
- 230000000295 complement effect Effects 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000004904 shortening Methods 0.000 claims 1
- 230000008485 antagonism Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 241001247986 Calotropis procera Species 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000009193 crawling Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
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
- E21D23/0073—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 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
- E21D23/006—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
- E21D23/0065—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 driven, or automatically, e.g. electrically-hydraulically controlled
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)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE517367A true BE517367A (enrdf_load_stackoverflow) |
Family
ID=154285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE517367D BE517367A (enrdf_load_stackoverflow) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE517367A (enrdf_load_stackoverflow) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3143862A (en) * | 1958-08-11 | 1964-08-11 | Dobson Ltd W E & F | Support of roofs in mines |
| DE1182184B (de) * | 1957-12-24 | 1964-11-26 | Emil Weber | Einrichtung zum schrittweisen Strebausbau |
| DE1188537B (de) * | 1958-12-15 | 1965-03-11 | Albert Hamel | Steuervorrichtung zum selbsttaetigen Entspannen, Verschieben und Einspannen hydraulischer Strebausbaurahmen |
| DE1277786B (de) * | 1958-09-18 | 1968-09-19 | Bosch Gmbh Robert | Steuergeraet fuer hydraulische Grubenausbaue |
-
0
- BE BE517367D patent/BE517367A/fr unknown
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1182184B (de) * | 1957-12-24 | 1964-11-26 | Emil Weber | Einrichtung zum schrittweisen Strebausbau |
| US3143862A (en) * | 1958-08-11 | 1964-08-11 | Dobson Ltd W E & F | Support of roofs in mines |
| DE1277786B (de) * | 1958-09-18 | 1968-09-19 | Bosch Gmbh Robert | Steuergeraet fuer hydraulische Grubenausbaue |
| DE1188537B (de) * | 1958-12-15 | 1965-03-11 | Albert Hamel | Steuervorrichtung zum selbsttaetigen Entspannen, Verschieben und Einspannen hydraulischer Strebausbaurahmen |
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