FR2141871B1 - - Google Patents

Info

Publication number
FR2141871B1
FR2141871B1 FR7221231A FR7221231A FR2141871B1 FR 2141871 B1 FR2141871 B1 FR 2141871B1 FR 7221231 A FR7221231 A FR 7221231A FR 7221231 A FR7221231 A FR 7221231A FR 2141871 B1 FR2141871 B1 FR 2141871B1
Authority
FR
France
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
FR7221231A
Other languages
French (fr)
Other versions
FR2141871A1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GROETSCHEL KARL
Original Assignee
GROETSCHEL KARL
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
Priority claimed from DE19712129749 external-priority patent/DE2129749C/en
Application filed by GROETSCHEL KARL filed Critical GROETSCHEL KARL
Publication of FR2141871A1 publication Critical patent/FR2141871A1/fr
Application granted granted Critical
Publication of FR2141871B1 publication Critical patent/FR2141871B1/fr
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
    • E21D23/0436—Means for inclining the base member of the support

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Architecture (AREA)
  • Geology (AREA)
  • Types And Forms Of Lifts (AREA)
  • Bridges Or Land Bridges (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Prostheses (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
FR7221231A 1971-06-16 1972-06-13 Expired FR2141871B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712129749 DE2129749C (en) 1971-06-16 Mobile extension with a device for lifting substructures

Publications (2)

Publication Number Publication Date
FR2141871A1 FR2141871A1 (en) 1973-01-26
FR2141871B1 true FR2141871B1 (en) 1978-03-03

Family

ID=5810871

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7221231A Expired FR2141871B1 (en) 1971-06-16 1972-06-13

Country Status (7)

Country Link
US (1) US3748861A (en)
ES (1) ES402534A1 (en)
FR (1) FR2141871B1 (en)
GB (1) GB1391510A (en)
PL (1) PL82001B1 (en)
RO (1) RO60927A (en)
ZA (1) ZA724069B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1114626A (en) * 1979-02-03 1981-12-22 John C. Smith Mine roof support
GB8328281D0 (en) * 1983-10-22 1983-11-23 Dobson Park Ind Mine roof supports
DE3400771A1 (en) * 1984-01-12 1985-07-18 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen EXTENSION FRAME, IN PARTICULAR SHIELD EXTENSION FRAME, WITH A LIFTING DEVICE FOR LIFTING THE RECESSED RUNNERS
US5584611A (en) * 1994-11-22 1996-12-17 Long-Airdox Roof support for underground excavations
CN102536290A (en) * 2012-03-23 2012-07-04 郑州四维机电设备制造有限公司 Face guard lockout mechanism
US10774642B1 (en) * 2019-05-05 2020-09-15 Liaoning University Hydraulic support unit and hydraulic support for anti-rock burst roadway
CN111594248B (en) * 2020-05-28 2021-05-28 张世敏 Special temporary support equipment for tunnel bridge
CN113622969B (en) * 2021-08-21 2023-09-22 华东矿用设备有限公司 Mining hydraulic supporting device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1075518B (en) * 1960-02-18 Hermann Schwarz Kommanditgesellschaft, Wattenscheid Migrating metallic lining for mining operations in mines
US3143862A (en) * 1958-08-11 1964-08-11 Dobson Ltd W E & F Support of roofs in mines
US3115754A (en) * 1959-01-23 1963-12-31 Dowty Mining Equipment Ltd Mining shield
GB966034A (en) * 1961-10-02 1964-08-06 Dowty Mining Equipment Ltd Advanceable roof support suitable for use in mines
FR1368750A (en) * 1963-01-22 1964-08-07 Houilleres Bassin Du Nord Improvement in support piles
FR92217E (en) * 1965-06-29 1968-10-11 Support for mines and process for its advancement

Also Published As

Publication number Publication date
DE2129749B1 (en) 1972-05-25
ES402534A1 (en) 1976-04-16
US3748861A (en) 1973-07-31
RO60927A (en) 1976-10-15
GB1391510A (en) 1975-04-23
PL82001B1 (en) 1975-10-31
FR2141871A1 (en) 1973-01-26
ZA724069B (en) 1973-03-28

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Legal Events

Date Code Title Description
ST Notification of lapse