BE570617A - - Google Patents
Info
- Publication number
- BE570617A BE570617A BE570617DA BE570617A BE 570617 A BE570617 A BE 570617A BE 570617D A BE570617D A BE 570617DA BE 570617 A BE570617 A BE 570617A
- Authority
- BE
- Belgium
- Prior art keywords
- extraction
- chain
- coal
- head
- guide
- Prior art date
Links
- 238000000605 extraction Methods 0.000 claims description 68
- 239000003245 coal Substances 0.000 claims description 41
- 125000006850 spacer group Chemical group 0.000 claims description 13
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 12
- 239000011707 mineral Substances 0.000 claims description 12
- 238000005553 drilling Methods 0.000 claims description 8
- 230000033001 locomotion Effects 0.000 claims description 7
- 238000005065 mining Methods 0.000 claims description 7
- 238000009966 trimming Methods 0.000 claims 1
- 238000013138 pruning Methods 0.000 description 13
- 230000007246 mechanism Effects 0.000 description 12
- 238000010276 construction Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 210000003462 vein Anatomy 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C27/00—Machines which completely free the mineral from the seam
- E21C27/10—Machines which completely free the mineral from the seam by both slitting and breaking-down
- E21C27/12—Machines which completely free the mineral from the seam by both slitting and breaking-down breaking-down effected by acting on the vertical face of the mineral, e.g. by percussive tools
- E21C27/124—Machines which completely free the mineral from the seam by both slitting and breaking-down breaking-down effected by acting on the vertical face of the mineral, e.g. by percussive tools with rotatable cutters provided with breaking-down members
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Harvesting Machines For Root Crops (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE570617A true BE570617A (de) |
Family
ID=189109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE570617D BE570617A (de) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE570617A (de) |
-
0
- BE BE570617D patent/BE570617A/fr unknown
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