DE1066967B - - Google Patents
Info
- Publication number
- DE1066967B DE1066967B DENDAT1066967D DE1066967DA DE1066967B DE 1066967 B DE1066967 B DE 1066967B DE NDAT1066967 D DENDAT1066967 D DE NDAT1066967D DE 1066967D A DE1066967D A DE 1066967DA DE 1066967 B DE1066967 B DE 1066967B
- Authority
- DE
- Germany
- Prior art keywords
- setting
- wedge
- punch
- wedges
- guide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 claims description 19
- 210000000078 claw Anatomy 0.000 claims description 9
- 239000003245 coal Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 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
- E21D15/58—Devices for setting props or chocks
- E21D15/581—Devices for setting props or chocks in which the props are pre- loaded
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)
- Manufacture Of Motors, Generators (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1066967B true DE1066967B (zh) | 1959-10-15 |
Family
ID=592962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT1066967D Pending DE1066967B (zh) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1066967B (zh) |
-
0
- DE DENDAT1066967D patent/DE1066967B/de active Pending
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