GB698672A - Improvements in and relating to mine roof-supporting girders or bars - Google Patents

Improvements in and relating to mine roof-supporting girders or bars

Info

Publication number
GB698672A
GB698672A GB9157/50A GB915750A GB698672A GB 698672 A GB698672 A GB 698672A GB 9157/50 A GB9157/50 A GB 9157/50A GB 915750 A GB915750 A GB 915750A GB 698672 A GB698672 A GB 698672A
Authority
GB
United Kingdom
Prior art keywords
bar
bars
shoe
flanges
end plates
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
GB9157/50A
Other languages
English (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.)
Gutehoffnungshutte Oberhausen AG
Original Assignee
Gutehoffnungshutte Oberhausen AG
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 Gutehoffnungshutte Oberhausen AG filed Critical Gutehoffnungshutte Oberhausen AG
Publication of GB698672A publication Critical patent/GB698672A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/02—Cantilever extension or similar protecting devices
    • E21D17/08—Cap joints for obtaining a coal-face free of pit-props
    • E21D17/086—Cap joints for obtaining a coal-face free of pit-props or articulated type

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)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
GB9157/50A 1949-09-19 1950-04-13 Improvements in and relating to mine roof-supporting girders or bars Expired GB698672A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE698672X 1949-09-19

Publications (1)

Publication Number Publication Date
GB698672A true GB698672A (en) 1953-10-21

Family

ID=6608226

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9157/50A Expired GB698672A (en) 1949-09-19 1950-04-13 Improvements in and relating to mine roof-supporting girders or bars

Country Status (2)

Country Link
GB (1) GB698672A (enrdf_load_stackoverflow)
NL (1) NL74919C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2884272A (en) * 1955-01-19 1959-04-28 Hans Gerlach Roof support structure for mine workings

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2884272A (en) * 1955-01-19 1959-04-28 Hans Gerlach Roof support structure for mine workings

Also Published As

Publication number Publication date
NL74919C (enrdf_load_stackoverflow)

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