GB1487553A - Mine roof support - Google Patents

Mine roof support

Info

Publication number
GB1487553A
GB1487553A GB48620/73A GB4862073A GB1487553A GB 1487553 A GB1487553 A GB 1487553A GB 48620/73 A GB48620/73 A GB 48620/73A GB 4862073 A GB4862073 A GB 4862073A GB 1487553 A GB1487553 A GB 1487553A
Authority
GB
United Kingdom
Prior art keywords
jack
support
mine roof
bar
advancing
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
GB48620/73A
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.)
Dowty Mining Equipment Ltd
Original Assignee
Dowty Mining Equipment 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 Dowty Mining Equipment Ltd filed Critical Dowty Mining Equipment Ltd
Priority to GB48620/73A priority Critical patent/GB1487553A/en
Priority to ZA00746078A priority patent/ZA746078B/en
Priority to US05/514,261 priority patent/US3952525A/en
Priority to DE2449059A priority patent/DE2449059B2/en
Priority to BE149686A priority patent/BE821250A/en
Priority to PL1974174919A priority patent/PL94050B1/pl
Priority to FR7435134A priority patent/FR2248405A1/fr
Publication of GB1487553A publication Critical patent/GB1487553A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F13/00—Transport specially adapted to underground conditions
    • E21F13/08—Shifting conveyors or other transport devices from one location at the working face to another
    • 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
    • E21D23/08—Advancing mechanisms
    • E21D23/081—Advancing mechanisms forming parts of the roof supports

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)
  • Mechanical Engineering (AREA)
  • Framework For Endless Conveyors (AREA)

Abstract

1487553 Advancing mine roof supports DOWTY MINING EQUIPMENT Ltd 20 Sept 1974 [18 Oct 1973 20 July 1974] 48620/73 and 32251/74 Heading E1P In a mine roof support having an advancing jack 18 connectible to an anchorage such as a conveyor by a relay bar 13, the jack is arranged to exert on the support a force having one component parallel to the direction of advance and another component which lifts the support from the floor. The thrust exerted by jack 18 acts in a straight line between pivot joints 19, 21 as shown, a slot 35 providing a lost motion connection between the jack and the bar 13. The jack is enclosed by a pair of telescopic tubes 27, 28 loaded by a spring-actuated plunger 38. In a modification, see Figs. 4..7 (not shown), the forward end of the jack is pivoted to a bridge member [119] extending between the front edges of the floor beams of the support and the plunger of the jack is pivotally. connected to the end of the relay bar.
GB48620/73A 1973-10-18 1973-10-18 Mine roof support Expired GB1487553A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB48620/73A GB1487553A (en) 1973-10-18 1973-10-18 Mine roof support
ZA00746078A ZA746078B (en) 1973-10-18 1974-09-25 Mine roof support
US05/514,261 US3952525A (en) 1973-10-18 1974-10-11 Mine roof support
DE2449059A DE2449059B2 (en) 1973-10-18 1974-10-15 Feed device for a traveling longwall construction frame
BE149686A BE821250A (en) 1973-10-18 1974-10-18 MINE GALLERY ROOF SUPPORT
PL1974174919A PL94050B1 (en) 1973-10-18 1974-10-18
FR7435134A FR2248405A1 (en) 1973-10-18 1974-10-18

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB48620/73A GB1487553A (en) 1973-10-18 1973-10-18 Mine roof support

Publications (1)

Publication Number Publication Date
GB1487553A true GB1487553A (en) 1977-10-05

Family

ID=10449289

Family Applications (1)

Application Number Title Priority Date Filing Date
GB48620/73A Expired GB1487553A (en) 1973-10-18 1973-10-18 Mine roof support

Country Status (3)

Country Link
BE (1) BE821250A (en)
GB (1) GB1487553A (en)
ZA (1) ZA746078B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2180285A (en) * 1985-08-22 1987-03-25 Oroszlanyi Szenbanyak Self advancing lifting toe support for underground longwall working
CN102852541A (en) * 2012-09-21 2013-01-02 郑州四维机电设备制造有限公司 Bottom lifting device for bracket

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2180285A (en) * 1985-08-22 1987-03-25 Oroszlanyi Szenbanyak Self advancing lifting toe support for underground longwall working
CN102852541A (en) * 2012-09-21 2013-01-02 郑州四维机电设备制造有限公司 Bottom lifting device for bracket
CN102852541B (en) * 2012-09-21 2015-05-06 卡特彼勒（郑州）有限公司 Bottom lifting device for bracket

Also Published As

Publication number Publication date
BE821250A (en) 1975-02-17
ZA746078B (en) 1975-11-26

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee