BE467867A - - Google Patents
Info
- Publication number
- BE467867A BE467867A BE467867DA BE467867A BE 467867 A BE467867 A BE 467867A BE 467867D A BE467867D A BE 467867DA BE 467867 A BE467867 A BE 467867A
- Authority
- BE
- Belgium
- Prior art keywords
- support
- feather
- roof
- prop
- elements
- Prior art date
Links
- 238000000034 method Methods 0.000 claims description 8
- 230000000284 resting effect Effects 0.000 claims description 4
- 210000003746 feather Anatomy 0.000 description 65
- 238000011084 recovery Methods 0.000 description 12
- 239000007787 solid Substances 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 210000003128 head Anatomy 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 210000003462 vein Anatomy 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003307 slaughter Methods 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 208000012868 Overgrowth Diseases 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000004459 forage Substances 0.000 description 1
- 210000001061 forehead Anatomy 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000000135 prohibitive effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D17/00—Caps for supporting mine roofs
- E21D17/02—Cantilever extension or similar protecting devices
- E21D17/08—Cap joints for obtaining a coal-face free of pit-props
- E21D17/082—Cap joints for obtaining a coal-face free of pit-props of sliding type
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)
- Agricultural Chemicals And Associated Chemicals (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE467867A true BE467867A (de) |
Family
ID=118774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE467867D BE467867A (de) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE467867A (de) |
-
0
- BE BE467867D patent/BE467867A/fr unknown
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