PL84776B1 - - Google Patents
Download PDFInfo
- Publication number
- PL84776B1 PL84776B1 PL1973161413A PL16141373A PL84776B1 PL 84776 B1 PL84776 B1 PL 84776B1 PL 1973161413 A PL1973161413 A PL 1973161413A PL 16141373 A PL16141373 A PL 16141373A PL 84776 B1 PL84776 B1 PL 84776B1
- Authority
- PL
- Poland
- Prior art keywords
- housing according
- canopy
- shields
- casing
- housing
- Prior art date
Links
- 238000005065 mining Methods 0.000 claims description 9
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 4
- 241001417527 Pempheridae Species 0.000 claims 1
- 230000000284 resting effect Effects 0.000 claims 1
- 238000009412 basement excavation Methods 0.000 description 12
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 2
- 241000239290 Araneae Species 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
-
- 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
- E21D23/0004—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face
- E21D23/0017—Pile type supports
- E21D23/003—Pile type supports consisting of a rigid pile
-
- 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
- E21D23/03—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor having protective means, e.g. shields, for preventing or impeding entry of loose material into the working space or support
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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1397272A GB1387311A (en) | 1972-03-24 | 1972-03-24 | Mine roof supports |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL84776B1 true PL84776B1 (de) | 1976-04-30 |
Family
ID=10032710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL1973161413A PL84776B1 (de) | 1972-03-24 | 1973-03-22 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3848420A (de) |
| AU (1) | AU466853B2 (de) |
| GB (1) | GB1387311A (de) |
| PL (1) | PL84776B1 (de) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1494284A (en) * | 1975-07-19 | 1977-12-07 | Gullick Dobson Ltd | Self-advancing mine roof supports |
| DE2646563C3 (de) * | 1976-10-15 | 1979-08-09 | Bochumer Eisenhuette Heintzmann Gmbh & Co, 4630 Bochum | Ausbau für den Saumbereich eines Strebs |
| JPS5416303A (en) * | 1977-07-07 | 1979-02-06 | Taiheiyo Eng | Apparatus for controlling floated dust powder and like in long wall type coal mining face |
| DE3643120A1 (de) * | 1986-01-22 | 1987-07-30 | Voest Alpine Ag | Ortsbeweglicher abstuetzbock |
| US5019651A (en) * | 1990-06-20 | 1991-05-28 | Merck & Co., Inc. | Process for preparing 4-amino-1-hydroxybutylidene-1,1-bisphosphonic acid (ABP) or salts thereof |
| US5769504A (en) * | 1996-03-11 | 1998-06-23 | Council Of Scientific & Industrial Research | Equipment for shortwall mining useful for extraction of pillars in underground coal mines |
| US8590982B2 (en) * | 2009-07-10 | 2013-11-26 | Joy Mm Delaware, Inc. | Longwall mining roof supports |
| CN102536288A (zh) * | 2012-01-10 | 2012-07-04 | 中煤北京煤矿机械有限责任公司 | 绿色环保高水充填支架 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1124665A (en) * | 1966-04-29 | 1968-08-21 | Gullick Ltd | Improvements in or relating to mine roof supports |
| GB1216322A (en) * | 1967-04-21 | 1970-12-16 | Dobson Ltd W E & F | Improvements in or relating to mine roof supports |
| GB1206283A (en) * | 1967-07-28 | 1970-09-23 | Herbert Cotterill Ltd | Improvements in or relating to mine roof supports |
| US3570255A (en) * | 1968-06-10 | 1971-03-16 | Mastabar Mining Equipment Co L | Mine roof support |
| DE6902441U (de) * | 1969-01-23 | 1969-05-22 | Kloeckner Werke Ag | Dreirahmengespann fuer den schreitenden strebausbau mit einer an seinen versatzseitigen stempeln angebrachten versatzabkleidung |
| DE2027299A1 (de) * | 1970-06-03 | 1971-12-09 | Klöckner-Werke ,4100 Duisburg | Kappenzug für Ausbaurahmen des wandernden Strebausbaus |
-
1972
- 1972-03-24 GB GB1397272A patent/GB1387311A/en not_active Expired
-
1973
- 1973-03-16 US US00342304A patent/US3848420A/en not_active Expired - Lifetime
- 1973-03-19 AU AU53457/73A patent/AU466853B2/en not_active Expired
- 1973-03-22 PL PL1973161413A patent/PL84776B1/pl unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB1387311A (en) | 1975-03-12 |
| US3848420A (en) | 1974-11-19 |
| AU5345773A (en) | 1974-09-19 |
| AU466853B2 (en) | 1975-11-13 |
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