BE458114A - - Google Patents
Info
- Publication number
- BE458114A BE458114A BE458114DA BE458114A BE 458114 A BE458114 A BE 458114A BE 458114D A BE458114D A BE 458114DA BE 458114 A BE458114 A BE 458114A
- Authority
- BE
- Belgium
- Prior art keywords
- props
- forces
- collapsing device
- contact surface
- curved
- Prior art date
Links
- 238000005065 mining Methods 0.000 claims description 4
- 239000003245 coal Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 2
- 206010011416 Croup infectious Diseases 0.000 description 1
- 230000003042 antagnostic effect Effects 0.000 description 1
- XTKDAFGWCDAMPY-UHFFFAOYSA-N azaperone Chemical compound C1=CC(F)=CC=C1C(=O)CCCN1CCN(C=2N=CC=CC=2)CC1 XTKDAFGWCDAMPY-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 201000010549 croup Diseases 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000002023 wood 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
- E21D15/02—Non-telescopic props
- E21D15/06—Non-telescopic props with parts joined by a lock, with or without slight axial adjustability
- E21D15/12—Non-telescopic props with parts joined by a lock, with or without slight axial adjustability with locking devices located near head or foot
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)
- Orthopedics, Nursing, And Contraception (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE458114A true BE458114A (de) |
Family
ID=111476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE458114D BE458114A (de) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE458114A (de) |
-
0
- BE BE458114D patent/BE458114A/fr unknown
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