GB1364221A - Hydraulically controlled roof support - Google Patents

Hydraulically controlled roof support

Info

Publication number
GB1364221A
GB1364221A GB262573A GB262573A GB1364221A GB 1364221 A GB1364221 A GB 1364221A GB 262573 A GB262573 A GB 262573A GB 262573 A GB262573 A GB 262573A GB 1364221 A GB1364221 A GB 1364221A
Authority
GB
United Kingdom
Prior art keywords
extension
jack
roof
levers
mine roof
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
GB262573A
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.)
PODMOSKOVNY NI PK UGOLNY INST
Original Assignee
PODMOSKOVNY NI PK UGOLNY INST
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 PODMOSKOVNY NI PK UGOLNY INST filed Critical PODMOSKOVNY NI PK UGOLNY INST
Priority to GB262573A priority Critical patent/GB1364221A/en
Publication of GB1364221A publication Critical patent/GB1364221A/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
    • E21D23/066—Pivoted cantilever extensions therefor
    • 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
    • E21D23/0047—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor without essential shifting devices

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)
  • Conveying And Assembling Of Building Elements In Situ (AREA)

Abstract

1364221 Mine roof supports PODMOSKOVNY NAUCHNO-ISSLEDOVATELSKY I PROEKTNOKONSTRUKTORSKY UGOLNY INSTITUT 18 Jan 1973 2625/73 Heading E1P In a hydraulic mine roof support frame 4 having a cantilever extension 5, the latter is urged into contact with the mine roof by a jack 13 acting on two double-arm levers 6, 7 which are arranged as shown and each pivoted to the extension 5 and the jack 13 by pivot pins 10, 12 respectively. The levers act on the extension 5 via rollers 8 and the overall arrangement is such that the angles through which the forward and rearward levers 6, 7 turn varies with the resistance offered by the roof over corresponding portions of the extension 5 so that self-setting therefrom occur. The extension 5 may be urged into contact with the roof by contraction of the jack and for this modified arrangement Fig. 7 (not shown), should be referred to.
GB262573A 1973-01-18 1973-01-18 Hydraulically controlled roof support Expired GB1364221A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB262573A GB1364221A (en) 1973-01-18 1973-01-18 Hydraulically controlled roof support

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB262573A GB1364221A (en) 1973-01-18 1973-01-18 Hydraulically controlled roof support

Publications (1)

Publication Number Publication Date
GB1364221A true GB1364221A (en) 1974-08-21

Family

ID=9742854

Family Applications (1)

Application Number Title Priority Date Filing Date
GB262573A Expired GB1364221A (en) 1973-01-18 1973-01-18 Hydraulically controlled roof support

Country Status (1)

Country Link
GB (1) GB1364221A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4114387A (en) * 1976-07-07 1978-09-19 Dowty Mining Equipment Limited Mine roof support
GB2192021A (en) * 1986-06-26 1987-12-31 Gullick Dobson Ltd Mine roof support with two relatively pivotal roof plates
GB2220022A (en) * 1988-06-24 1989-12-28 Dowty Hucknall Limited Mine roof support
CN102562102A (en) * 2012-03-23 2012-07-11 郑州四维机电设备制造有限公司 Composite telescopic beam mechanism
CN109538274A (en) * 2018-12-27 2019-03-29 中煤北京煤矿机械有限责任公司 Ultra-thin action stretch beam mechanism
CN110359941A (en) * 2019-07-12 2019-10-22 天地科技股份有限公司 A kind of top beam and the hydraulic support comprising the top beam

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4114387A (en) * 1976-07-07 1978-09-19 Dowty Mining Equipment Limited Mine roof support
GB2192021A (en) * 1986-06-26 1987-12-31 Gullick Dobson Ltd Mine roof support with two relatively pivotal roof plates
US4784532A (en) * 1986-06-26 1988-11-15 Gullick Dobson Limited Mine roof supports
GB2192021B (en) * 1986-06-26 1990-03-21 Gullick Dobson Ltd A roof engaging structure for a mine roof support
GB2220022A (en) * 1988-06-24 1989-12-28 Dowty Hucknall Limited Mine roof support
GB2220022B (en) * 1988-06-24 1992-06-10 Dowty Hucknall Limited Mine roof support
CN102562102A (en) * 2012-03-23 2012-07-11 郑州四维机电设备制造有限公司 Composite telescopic beam mechanism
CN102562102B (en) * 2012-03-23 2014-09-03 卡特彼勒（郑州）有限公司 Composite telescopic beam mechanism
CN109538274A (en) * 2018-12-27 2019-03-29 中煤北京煤矿机械有限责任公司 Ultra-thin action stretch beam mechanism
CN110359941A (en) * 2019-07-12 2019-10-22 天地科技股份有限公司 A kind of top beam and the hydraulic support comprising the top beam

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees