BE661619A - - Google Patents
Info
- Publication number
- BE661619A BE661619A BE661619DA BE661619A BE 661619 A BE661619 A BE 661619A BE 661619D A BE661619D A BE 661619DA BE 661619 A BE661619 A BE 661619A
- Authority
- BE
- Belgium
- Prior art keywords
- tube
- prop
- timbering
- tenons
- leaf spring
- Prior art date
Links
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 229910001018 Cast iron Inorganic materials 0.000 claims 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
- E21D23/0047—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor without essential shifting devices
-
- 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
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)
- Joining Of Building Structures In Genera (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE661619A true BE661619A (en:Method) |
Family
ID=207290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE661619D BE661619A (en:Method) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE661619A (en:Method) |
-
0
- BE BE661619D patent/BE661619A/fr unknown
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