BE523225A - - Google Patents

Info

Publication number
BE523225A
BE523225A BE523225DA BE523225A BE 523225 A BE523225 A BE 523225A BE 523225D A BE523225D A BE 523225DA BE 523225 A BE523225 A BE 523225A
Authority
BE
Belgium
Application number
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.)
Publication of BE523225A publication Critical patent/BE523225A/xx

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00Caps for supporting mine roofs
    • E21D17/02Cantilever extension or similar protecting devices
    • E21D17/08Cap joints for obtaining a coal-face free of pit-props
    • E21D17/086Cap 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)
BE523225D 1952-10-02 BE523225A (pl)

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
BE523225A true BE523225A (pl)

Family

ID=10216165

Family Applications (1)

Application Number Title Priority Date Filing Date
BE523225D BE523225A (pl) 1952-10-02

Country Status (3)

Country Link
BE (1) BE523225A (pl)
FR (1) FR1084556A (pl)
GB (1) GB744361A (pl)

Also Published As

Publication number Publication date
FR1084556A (fr) 1955-01-20
GB744361A (en) 1956-02-08

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