DE217547C - - Google Patents
Info
- Publication number
- DE217547C DE217547C DENDAT217547D DE217547DA DE217547C DE 217547 C DE217547 C DE 217547C DE NDAT217547 D DENDAT217547 D DE NDAT217547D DE 217547D A DE217547D A DE 217547DA DE 217547 C DE217547 C DE 217547C
- Authority
- DE
- Germany
- Prior art keywords
- hanging wall
- chutes
- falling
- intercepted
- pledging
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 description 2
- 241000182341 Cubitermes group Species 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 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
- E21D17/00—Caps for supporting mine roofs
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)
- Excavating Of Shafts Or Tunnels (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE217547C true DE217547C (cg-RX-API-DMAC7.html) |
Family
ID=478843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT217547D Active DE217547C (cg-RX-API-DMAC7.html) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE217547C (cg-RX-API-DMAC7.html) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3107902A (en) * | 1958-12-29 | 1963-10-22 | Joy Mfg Co | Method of supporting mine roofs and supporting means therefor |
-
0
- DE DENDAT217547D patent/DE217547C/de active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3107902A (en) * | 1958-12-29 | 1963-10-22 | Joy Mfg Co | Method of supporting mine roofs and supporting means therefor |
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