BE570860A - - Google Patents
Info
- Publication number
- BE570860A BE570860A BE570860DA BE570860A BE 570860 A BE570860 A BE 570860A BE 570860D A BE570860D A BE 570860DA BE 570860 A BE570860 A BE 570860A
- Authority
- BE
- Belgium
- Prior art keywords
- prop
- section
- blades
- external
- cutting grid
- Prior art date
Links
- 238000005520 cutting process Methods 0.000 claims description 21
- 238000004140 cleaning Methods 0.000 claims description 12
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 description 5
- 239000011435 rock Substances 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 101100521345 Mus musculus Prop1 gene Proteins 0.000 description 2
- 108700017836 Prophet of Pit-1 Proteins 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 235000016936 Dendrocalamus strictus Nutrition 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000003313 weakening effect Effects 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
- E21D15/15—Means counteracting entry of dirt; Built-in cleaning devices
- E21D15/155—Built-in cleaning devices
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)
- Emergency Lowering Means (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE570860A true BE570860A (de) |
Family
ID=189264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE570860D BE570860A (de) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE570860A (de) |
-
0
- BE BE570860D patent/BE570860A/fr unknown
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