NL6700923A - - Google Patents
Info
- Publication number
- NL6700923A NL6700923A NL6700923A NL6700923A NL6700923A NL 6700923 A NL6700923 A NL 6700923A NL 6700923 A NL6700923 A NL 6700923A NL 6700923 A NL6700923 A NL 6700923A NL 6700923 A NL6700923 A NL 6700923A
- Authority
- NL
- Netherlands
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D17/00—Caps for supporting mine roofs
- E21D17/02—Cantilever extension or similar protecting devices
- E21D17/0206—Hydraulically operated extension devices
-
- 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
-
- 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)
- Excavating Of Shafts Or Tunnels (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEG0046170 | 1966-03-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL6700923A true NL6700923A (ja) | 1967-09-04 |
Family
ID=7127942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL6700923A NL6700923A (ja) | 1966-03-01 | 1967-01-20 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3441317A (ja) |
| FR (1) | FR1510670A (ja) |
| GB (1) | GB1124715A (ja) |
| NL (1) | NL6700923A (ja) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1494284A (en) * | 1975-07-19 | 1977-12-07 | Gullick Dobson Ltd | Self-advancing mine roof supports |
| DE3631069A1 (de) * | 1986-09-12 | 1988-03-24 | Bochumer Eisen Heintzmann | Verfahren zum loesen der oberkohle |
| DE3631079A1 (de) * | 1986-09-12 | 1988-03-24 | Bochumer Eisen Heintzmann | Ruettelsteuerung fuer einen hydraulikzylinder |
| NO160936C (no) * | 1987-02-24 | 1989-06-21 | Arne Martin Lerstoel | Anordning ved byggekonstruksjon. |
| RU2451183C1 (ru) * | 2010-11-29 | 2012-05-20 | Государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный горный институт имени Г.В. Плеханова (технический университет)" | Скалывающий козырек секции механизированной крепи |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2716025A (en) * | 1951-07-17 | 1955-08-23 | Paul V Malloy | Method and mining apparatus with movable roof supports |
-
1967
- 1967-01-20 NL NL6700923A patent/NL6700923A/xx unknown
- 1967-02-09 FR FR94267A patent/FR1510670A/fr not_active Expired
- 1967-02-22 GB GB8364/67A patent/GB1124715A/en not_active Expired
- 1967-02-24 US US618364A patent/US3441317A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| GB1124715A (en) | 1968-08-21 |
| FR1510670A (fr) | 1968-01-19 |
| US3441317A (en) | 1969-04-29 |