PL78410B1 - Stepping shield supporting device[hu176912b] - Google Patents
Stepping shield supporting device[hu176912b] Download PDFInfo
- Publication number
- PL78410B1 PL78410B1 PL15791872A PL15791872A PL78410B1 PL 78410 B1 PL78410 B1 PL 78410B1 PL 15791872 A PL15791872 A PL 15791872A PL 15791872 A PL15791872 A PL 15791872A PL 78410 B1 PL78410 B1 PL 78410B1
- Authority
- PL
- Poland
- Prior art keywords
- articulated
- roof
- canopy
- disc
- sliding
- Prior art date
Links
- 238000005520 cutting process Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 4
- 238000009412 basement excavation Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 210000002105 tongue Anatomy 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 description 5
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000779 smoke Substances 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
- E21D23/04—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
-
- 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
- E21D17/08—Cap joints for obtaining a coal-face free of pit-props
- E21D17/082—Cap joints for obtaining a coal-face free of pit-props of sliding type
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)
- Architecture (AREA)
- Structural Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Lining And Supports For Tunnels (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HUBA002649 HU176912B (hu) | 1971-09-28 | 1971-09-28 | Peredvizhnoj mekhanizm kreplenija hhita |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL78410B1 true PL78410B1 (en) | 1975-06-30 |
Family
ID=10993334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL15791872A PL78410B1 (en) | 1971-09-28 | 1972-09-28 | Stepping shield supporting device[hu176912b] |
Country Status (11)
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5833532B2 (ja) * | 1975-02-26 | 1983-07-20 | キヤノン株式会社 | ダイコウケイズ−ムレンズ |
| DE2634014C3 (de) * | 1976-07-29 | 1981-03-26 | Gewerkschaft Eisenhütte Westfalia GmbH, 4670 Lünen | Schildausbaugestell |
| JPS53131852A (en) * | 1977-04-22 | 1978-11-17 | Nippon Chemical Ind | Tele zoom lens |
| JPS60419A (ja) * | 1984-04-20 | 1985-01-05 | Nippon Kogaku Kk <Nikon> | 望遠ズ−ムレンズ |
| JPH0629907B2 (ja) * | 1985-08-22 | 1994-04-20 | キヤノン株式会社 | 大口径比のズ−ムレンズ |
| CN101943016A (zh) * | 2010-08-17 | 2011-01-12 | 天地科技股份有限公司 | 极薄煤层新型掩护式综采液压支架 |
| CN104858007B (zh) * | 2015-06-04 | 2017-08-18 | 中煤张家口煤矿机械有限责任公司 | 综采工作面输送卸载区电直驱齿辊式连续破碎装置 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1257722B (de) * | 1966-02-16 | 1968-01-04 | Hansjoachim Von Hippel Dr Ing | Unter Last rueckbarer Stempelausbau |
| FR1503990A (fr) * | 1966-10-11 | 1967-12-01 | Bennes Marrel | Perfectionnements aux piles de soutènement, notamment pour les mines ou pour les chantiers souterrains |
-
0
- BE BE789315D patent/BE789315A/xx not_active IP Right Cessation
-
1971
- 1971-09-28 HU HUBA002649 patent/HU176912B/hu unknown
-
1972
- 1972-09-12 AT AT782972A patent/AT320565B/de not_active IP Right Cessation
- 1972-09-13 DE DE19722244911 patent/DE2244911C3/de not_active Expired
- 1972-09-13 DE DE19727233741 patent/DE7233741U/de not_active Expired
- 1972-09-26 CS CS651872A patent/CS157005B2/cs unknown
- 1972-09-27 ES ES407051A patent/ES407051A1/es not_active Expired
- 1972-09-27 GB GB4453672A patent/GB1381198A/en not_active Expired
- 1972-09-27 YU YU244872A patent/YU35181B/xx unknown
- 1972-09-28 JP JP9758872A patent/JPS565920B2/ja not_active Expired
- 1972-09-28 RO RO7236272A patent/RO60607A/ro unknown
- 1972-09-28 PL PL15791872A patent/PL78410B1/pl unknown
Also Published As
| Publication number | Publication date |
|---|---|
| YU35181B (en) | 1980-09-25 |
| CS157005B2 (enrdf_load_stackoverflow) | 1974-08-23 |
| BE789315A (fr) | 1973-01-15 |
| JPS4841902A (enrdf_load_stackoverflow) | 1973-06-19 |
| DE2244911B2 (de) | 1980-10-02 |
| DE2244911A1 (de) | 1973-04-05 |
| DE7233741U (de) | 1982-07-15 |
| GB1381198A (en) | 1975-01-22 |
| RO60607A (enrdf_load_stackoverflow) | 1976-10-15 |
| AT320565B (de) | 1975-02-25 |
| HU176912B (hu) | 1981-06-28 |
| YU244872A (en) | 1979-12-31 |
| ES407051A1 (es) | 1975-11-16 |
| JPS565920B2 (enrdf_load_stackoverflow) | 1981-02-07 |
| DE2244911C3 (de) | 1981-08-20 |
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