GB741150A - Improvements in mine roof supports - Google Patents

Improvements in mine roof supports

Info

Publication number
GB741150A
GB741150A GB5311/53A GB531153A GB741150A GB 741150 A GB741150 A GB 741150A GB 5311/53 A GB5311/53 A GB 5311/53A GB 531153 A GB531153 A GB 531153A GB 741150 A GB741150 A GB 741150A
Authority
GB
United Kingdom
Prior art keywords
prop
roof
pressure
thrust means
additional hydraulic
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
GB5311/53A
Other languages
English (en)
Inventor
Joseph Alexander Wallace Mills
Hugh Langford Holt
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 Hydraulic Units Ltd
Original Assignee
Dowty Hydraulic Units 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
Priority to BE526791D priority Critical patent/BE526791A/xx
Application filed by Dowty Hydraulic Units Ltd filed Critical Dowty Hydraulic Units Ltd
Priority to GB5311/53A priority patent/GB741150A/en
Priority to FR1096391D priority patent/FR1096391A/fr
Priority to US412303A priority patent/US2857125A/en
Priority to NLAANVRAGE7402426,A priority patent/NL185384B/xx
Priority to DED17124A priority patent/DE946528C/de
Publication of GB741150A publication Critical patent/GB741150A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14—Telescopic props
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/50—Component parts or details of props
    • E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
    • E21D15/517—Extension elements
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Actuator (AREA)
  • Press Drives And Press Lines (AREA)
GB5311/53A 1953-02-25 1953-02-25 Improvements in mine roof supports Expired GB741150A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BE526791D BE526791A (de) 1953-02-25
GB5311/53A GB741150A (en) 1953-02-25 1953-02-25 Improvements in mine roof supports
FR1096391D FR1096391A (fr) 1953-02-25 1954-02-24 étai de mine perfectionné
US412303A US2857125A (en) 1953-02-25 1954-02-24 Mine roof supports
NLAANVRAGE7402426,A NL185384B (nl) 1953-02-25 1954-02-24 Werkwijze voor het bereiden van een voedingssamenstelling met hypocholesterolemische werking.
DED17124A DE946528C (de) 1953-02-25 1954-02-25 Hydraulisch betaetigter Grubenstempel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5311/53A GB741150A (en) 1953-02-25 1953-02-25 Improvements in mine roof supports

Publications (1)

Publication Number Publication Date
GB741150A true GB741150A (en) 1955-11-30

Family

ID=9793715

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5311/53A Expired GB741150A (en) 1953-02-25 1953-02-25 Improvements in mine roof supports

Country Status (6)

Country Link
US (1) US2857125A (de)
BE (1) BE526791A (de)
DE (1) DE946528C (de)
FR (1) FR1096391A (de)
GB (1) GB741150A (de)
NL (1) NL185384B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1107168B (de) * 1957-02-06 1961-05-25 Dowty Mining Equipment Ltd UEberdruckventil fuer hydraulische Grubenstempel

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1094209B (de) * 1954-09-10 1960-12-08 Rheinstahl Gmbh Wanheim Grubenstempel
DE1023436B (de) * 1955-11-24 1958-01-30 Hermann Schwarz Kommanditgesel Hydraulischer Grubenstempel
BE553228A (de) * 1955-12-08
DE1062654B (de) * 1956-04-03 1959-08-06 Kloeckner Bergbau Viktor Icker Hydraulischer Grubenstempel
DE1081397B (de) * 1956-06-25 1960-05-12 Becorit Grubenausbau Gmbh Hydraulischer Grubenstempel
GB894292A (en) * 1957-07-30 1962-04-18 Mastabar Mining Equip Co Ltd Improvements in or relating to hydraulic props, particularly pit props
GB948255A (en) * 1959-03-03 1964-01-29 Dobson Ltd W E & F Improvements in or relating to hydraulic pit props
FR1280684A (fr) * 1960-11-22 1962-01-08 Sagem étançon hydraulique
US3830456A (en) * 1972-12-22 1974-08-20 Fletcher J & Co Mining apparatus
FR2505925A1 (fr) * 1981-05-12 1982-11-19 Alsace Mines Potasse Dispositif mecanique de liaison entre tete ou pied d'etancon et embase ou chapeau des piles de soutenement
CN102562100A (zh) * 2010-12-13 2012-07-11 襄樊禹仁机电液压科技有限公司 一种自动排气的单体液压支柱

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE289904C (de) *
GB636568A (en) * 1953-07-20 1950-05-03 George Herbert Dowty Improvements in pit props and other telescopic struts
FR1009955A (fr) * 1948-07-15 1952-06-05 Soutènement de galerie de mine
GB658998A (en) * 1948-09-01 1951-10-17 Dowty Equipment Ltd Improvements in mine roof supports

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1107168B (de) * 1957-02-06 1961-05-25 Dowty Mining Equipment Ltd UEberdruckventil fuer hydraulische Grubenstempel

Also Published As

Publication number Publication date
DE946528C (de) 1956-08-02
NL185384B (nl) 1958-04-15
FR1096391A (fr) 1955-06-20
US2857125A (en) 1958-10-21
BE526791A (de)

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