GB1429799A - Mine roof supports - Google Patents

Mine roof supports

Info

Publication number
GB1429799A
GB1429799A GB397473*[A GB397473A GB1429799A GB 1429799 A GB1429799 A GB 1429799A GB 397473 A GB397473 A GB 397473A GB 1429799 A GB1429799 A GB 1429799A
Authority
GB
United Kingdom
Prior art keywords
extension
mine roof
jack
shield
roof supports
Prior art date
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
GB397473*[A
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.)
Gullick Dobson Ltd
Original Assignee
Gullick Dobson Ltd
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 by Gullick Dobson Ltd filed Critical Gullick Dobson Ltd
Priority to GB397473*[A priority Critical patent/GB1429799A/en
Priority to US429674A priority patent/US3889475A/en
Publication of GB1429799A publication Critical patent/GB1429799A/en
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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)

Abstract

1429799 Mine roof supports GULLICK DOBSON Ltd 14 Dec 1973 [26 Jan 1973] 3974/73 Heading E1P A mine roof support, which may be advanced by a jack 18, is provided with a cantilever 14 having an extension 16 carrying a flush shield 20, the arrangement being such that the flush shield is operationally set when the extension is retracted and is automatically inoperatively positioned as shown in chain lines when the said extension is advanced. The cantilever is urged against the roof by a jack 14a and the extension is reciprocated by a jack 16, the shield being pivotally connected to the extension at 21 and by means of a pivotal link 23.
GB397473*[A 1973-01-26 1973-01-26 Mine roof supports Expired GB1429799A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB397473*[A GB1429799A (en) 1973-01-26 1973-01-26 Mine roof supports
US429674A US3889475A (en) 1973-01-26 1973-12-28 Mine roof supports

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB397473*[A GB1429799A (en) 1973-01-26 1973-01-26 Mine roof supports

Publications (1)

Publication Number Publication Date
GB1429799A true GB1429799A (en) 1976-03-24

Family

ID=9768421

Family Applications (1)

Application Number Title Priority Date Filing Date
GB397473*[A Expired GB1429799A (en) 1973-01-26 1973-01-26 Mine roof supports

Country Status (2)

Country Link
US (1) US3889475A (en)
GB (1) GB1429799A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4310268A (en) * 1978-07-05 1982-01-12 Fletcher Sutcliffe Wild Limited Mining equipment
US4386878A (en) * 1980-05-06 1983-06-07 Kozponti Banyaszati Fejlesztesi Intezet Mining equipment, mainly for extraction of heavy beds
US4784532A (en) * 1986-06-26 1988-11-15 Gullick Dobson Limited Mine roof supports

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1504883A (en) * 1974-06-04 1978-03-22 Gullick Dobson Ltd Mine roof supports
GB1494284A (en) * 1975-07-19 1977-12-07 Gullick Dobson Ltd Self-advancing mine roof supports
GB1571503A (en) * 1976-01-24 1980-07-16 Dowty Mining Equipment Ltd Longwall mining apparatus
AU527664B2 (en) * 1978-04-20 1983-03-17 Huwood Ltd. Mine roof support
GB2062735B (en) * 1979-11-09 1983-08-10 Dobson Park Ind Coal face support
GB2087964B (en) * 1980-11-26 1984-03-21 Dowty Mining Equipment Ltd Roof support for use in mines
ZA808106B (en) * 1980-12-30 1982-01-27 Gewerk Eisenhuette Westfalia Mineral mining installation
CN102042024B (en) * 2010-11-13 2012-11-07 枣庄矿业（集团）有限责任公司第二机械厂 Advanced support bracket for sliding top beam
CN102230387A (en) * 2011-05-24 2011-11-02 中煤北京煤矿机械有限责任公司 Movable anti-falling rack canopy guard device and tip bracket
CN105863691A (en) * 2016-05-04 2016-08-17 淮南矿业(集团)有限责任公司 Fully mechanized coal mining face support retracting roof supporting construction method
CN108661684B (en) * 2018-04-23 2020-05-22 山东明兴矿业集团有限公司 Supporting device and protection method for fully mechanized coal mining face of coal seam containing hard gangue

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2119246A1 (en) * 1971-04-21 1972-11-02 Gewerkschaft Eisenhütte Westfalia, 4628 Altlünen Break deflector, especially for a gradual expansion for underground operations

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4310268A (en) * 1978-07-05 1982-01-12 Fletcher Sutcliffe Wild Limited Mining equipment
US4386878A (en) * 1980-05-06 1983-06-07 Kozponti Banyaszati Fejlesztesi Intezet Mining equipment, mainly for extraction of heavy beds
US4784532A (en) * 1986-06-26 1988-11-15 Gullick Dobson Limited Mine roof supports

Also Published As

Publication number Publication date
US3889475A (en) 1975-06-17

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee