JPS565920B2 - - Google Patents

Info

Publication number
JPS565920B2
JPS565920B2 JP9758872A JP9758872A JPS565920B2 JP S565920 B2 JPS565920 B2 JP S565920B2 JP 9758872 A JP9758872 A JP 9758872A JP 9758872 A JP9758872 A JP 9758872A JP S565920 B2 JPS565920 B2 JP S565920B2
Authority
JP
Japan
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.)
Expired
Application number
JP9758872A
Other versions
JPS4841902A (ja
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of JPS4841902A publication Critical patent/JPS4841902A/ja
Publication of JPS565920B2 publication Critical patent/JPS565920B2/ja
Expired legal-status Critical Current

Links

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)
JP9758872A 1971-09-28 1972-09-28 Expired JPS565920B2 (ja)

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 (2)

Publication Number Publication Date
JPS4841902A JPS4841902A (ja) 1973-06-19
JPS565920B2 true JPS565920B2 (ja) 1981-02-07

Family

ID=10993334

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9758872A Expired JPS565920B2 (ja) 1971-09-28 1972-09-28

Country Status (11)

Country Link
JP (1) JPS565920B2 (ja)
AT (1) AT320565B (ja)
BE (1) BE789315A (ja)
CS (1) CS157005B2 (ja)
DE (2) DE2244911C3 (ja)
ES (1) ES407051A1 (ja)
GB (1) GB1381198A (ja)
HU (1) HU176912B (ja)
PL (1) PL78410B1 (ja)
RO (1) RO60607A (ja)
YU (1) YU35181B (ja)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
YU244872A (en) 1979-12-31
BE789315A (fr) 1973-01-15
ES407051A1 (es) 1975-11-16
RO60607A (ja) 1976-10-15
AT320565B (de) 1975-02-25
CS157005B2 (ja) 1974-08-23
DE2244911C3 (de) 1981-08-20
DE2244911B2 (de) 1980-10-02
HU176912B (hu) 1981-06-28
JPS4841902A (ja) 1973-06-19
GB1381198A (en) 1975-01-22
DE7233741U (de) 1982-07-15
YU35181B (en) 1980-09-25
PL78410B1 (en) 1975-06-30
DE2244911A1 (de) 1973-04-05

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