BE486962A - - Google Patents
Info
- Publication number
- BE486962A BE486962A BE486962DA BE486962A BE 486962 A BE486962 A BE 486962A BE 486962D A BE486962D A BE 486962DA BE 486962 A BE486962 A BE 486962A
- Authority
- BE
- Belgium
- Prior art keywords
- punch
- barrel
- prop according
- mine prop
- belt
- Prior art date
Links
- 239000002184 metal Substances 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 239000000470 constituent Substances 0.000 claims description 4
- 230000000717 retained effect Effects 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- 230000007547 defect Effects 0.000 claims description 2
- 230000002349 favourable effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 238000007747 plating Methods 0.000 claims description 2
- 230000003068 static effect Effects 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 claims 2
- 238000005065 mining Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 210000003462 vein Anatomy 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
- E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
- E21D15/22—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with member, pin, cross- piece, or the like, ruptured, sheared through, or permanently deformed upon excessive pressure
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)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE486962A true BE486962A (enExample) |
Family
ID=132516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE486962D BE486962A (enExample) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE486962A (enExample) |
-
0
- BE BE486962D patent/BE486962A/fr unknown
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