GB744361A - Improvements in mine roof supports - Google Patents

Improvements in mine roof supports

Info

Publication number
GB744361A
GB744361A GB2471952A GB2471952A GB744361A GB 744361 A GB744361 A GB 744361A GB 2471952 A GB2471952 A GB 2471952A GB 2471952 A GB2471952 A GB 2471952A GB 744361 A GB744361 A GB 744361A
Authority
GB
United Kingdom
Prior art keywords
roof
bar
bars
recesses
shackle 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
GB2471952A
Other languages
English (en)
Inventor
Charles Edward Day
Ray Fancott Lansdown
John Edwin Temple
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.)
Coal Industry Patents Ltd
Original Assignee
Coal Industry Patents 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 BE523225D priority Critical patent/BE523225A/xx
Application filed by Coal Industry Patents Ltd filed Critical Coal Industry Patents Ltd
Priority to GB2471952A priority patent/GB744361A/en
Priority to FR1084556D priority patent/FR1084556A/fr
Publication of GB744361A publication Critical patent/GB744361A/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)
  • Joining Of Building Structures In Genera (AREA)
GB2471952A 1952-10-02 1952-10-02 Improvements in mine roof supports Expired GB744361A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE523225D BE523225A (forum.php) 1952-10-02
GB2471952A GB744361A (en) 1952-10-02 1952-10-02 Improvements in mine roof supports
FR1084556D FR1084556A (fr) 1952-10-02 1953-10-02 Support de toit dans une mine souterraine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2471952A GB744361A (en) 1952-10-02 1952-10-02 Improvements in mine roof supports

Publications (1)

Publication Number Publication Date
GB744361A true GB744361A (en) 1956-02-08

Family

ID=10216165

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2471952A Expired GB744361A (en) 1952-10-02 1952-10-02 Improvements in mine roof supports

Country Status (3)

Country Link
BE (1) BE523225A (forum.php)
FR (1) FR1084556A (forum.php)
GB (1) GB744361A (forum.php)

Also Published As

Publication number Publication date
BE523225A (forum.php)
FR1084556A (fr) 1955-01-20

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