BE448346A - - Google Patents
Info
- Publication number
- BE448346A BE448346A BE448346DA BE448346A BE 448346 A BE448346 A BE 448346A BE 448346D A BE448346D A BE 448346DA BE 448346 A BE448346 A BE 448346A
- Authority
- BE
- Belgium
- Prior art keywords
- lock
- prop
- keys
- mine
- clamp
- Prior art date
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims description 2
- 239000003245 coal Substances 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
- E21D15/285—Telescopic props with parts held relatively to each other by friction or gripping by means of wedges or wedge combinations
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Catching Or Destruction (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE448346A true BE448346A (enrdf_load_stackoverflow) |
Family
ID=103940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE448346D BE448346A (enrdf_load_stackoverflow) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE448346A (enrdf_load_stackoverflow) |
-
0
- BE BE448346D patent/BE448346A/fr unknown
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