BE536990A - - Google Patents

Info

Publication number
BE536990A
BE536990A BE536990DA BE536990A BE 536990 A BE536990 A BE 536990A BE 536990D A BE536990D A BE 536990DA BE 536990 A BE536990 A BE 536990A
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 BE536990A publication Critical patent/BE536990A/xx

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)
  • Lining And Supports For Tunnels (AREA)
BE536990D 1954-04-01 BE536990A (enrdf_load_html_response)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB959854A GB775180A (en) 1954-04-01 1954-04-01 Improvements in or relating to roof bars for use in underground mines

Publications (1)

Publication Number Publication Date
BE536990A true BE536990A (enrdf_load_html_response)

Family

ID=9875073

Family Applications (1)

Application Number Title Priority Date Filing Date
BE536990D BE536990A (enrdf_load_html_response) 1954-04-01

Country Status (3)

Country Link
BE (1) BE536990A (enrdf_load_html_response)
FR (1) FR1131903A (enrdf_load_html_response)
GB (1) GB775180A (enrdf_load_html_response)

Also Published As

Publication number Publication date
FR1131903A (fr) 1957-03-01
GB775180A (en) 1957-05-22

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