GB719215A - Support for mine workings - Google Patents

Support for mine workings

Info

Publication number
GB719215A
GB719215A GB28827/50A GB2882750A GB719215A GB 719215 A GB719215 A GB 719215A GB 28827/50 A GB28827/50 A GB 28827/50A GB 2882750 A GB2882750 A GB 2882750A GB 719215 A GB719215 A GB 719215A
Authority
GB
United Kingdom
Prior art keywords
girder
wedge
pin
articulation
cheek
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
GB28827/50A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB719215A publication Critical patent/GB719215A/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)
  • Working Measures On Existing Buildindgs (AREA)
  • Bridges Or Land Bridges (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)
GB28827/50A 1949-11-25 1950-11-24 Support for mine workings Expired GB719215A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE719215X 1949-11-25

Publications (1)

Publication Number Publication Date
GB719215A true GB719215A (en) 1954-12-01

Family

ID=6627150

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28827/50A Expired GB719215A (en) 1949-11-25 1950-11-24 Support for mine workings

Country Status (3)

Country Link
BE (1) BE499524A (nl)
FR (1) FR1028354A (nl)
GB (1) GB719215A (nl)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1064008B (de) * 1953-02-27 1959-08-27 Gutehoffnungshuette Sterkrade Gelenkverbindung zweier Grubenausbaukappen

Also Published As

Publication number Publication date
FR1028354A (fr) 1953-05-21
BE499524A (nl)

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