BE708882A - - Google Patents
Info
- Publication number
- BE708882A BE708882A BE708882DA BE708882A BE 708882 A BE708882 A BE 708882A BE 708882D A BE708882D A BE 708882DA BE 708882 A BE708882 A BE 708882A
- Authority
- BE
- Belgium
Links
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
- E21C27/01—Machines which completely free the mineral from the seam specially adapted for removing overhanging coal
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
- E21D23/06—Special mine caps or special tops of pit-props for permitting step-by-step movement
- E21D23/063—Retractable cantilever extensions therefor
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)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL118299A PL56867B1 (en:Method) | 1967-01-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE708882A true BE708882A (en:Method) | 1968-05-16 |
Family
ID=19949590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE708882D BE708882A (en:Method) | 1967-01-02 | 1968-01-02 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE708882A (en:Method) |
| FR (1) | FR1549904A (en:Method) |
-
1968
- 1968-01-02 BE BE708882D patent/BE708882A/xx unknown
- 1968-01-02 FR FR1549904D patent/FR1549904A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1549904A (en:Method) | 1968-12-13 |