BE570620A - - Google Patents

Info

Publication number
BE570620A
BE570620A BE570620A BE570620A BE570620A BE 570620 A BE570620 A BE 570620A BE 570620 A BE570620 A BE 570620A BE 570620 A BE570620 A BE 570620A BE 570620 A BE570620 A BE 570620A
Authority
BE
Belgium
Application number
BE570620A
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 filed Critical
Publication of BE570620A publication Critical patent/BE570620A/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)
  • Forklifts And Lifting Vehicles (AREA)
BE570620A 1958-07-31 1958-08-25 BE570620A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2462858A GB848534A (en) 1958-07-31 1958-07-31 Mine roof bars

Publications (1)

Publication Number Publication Date
BE570620A true BE570620A (enrdf_load_stackoverflow) 1958-09-15

Family

ID=10214697

Family Applications (1)

Application Number Title Priority Date Filing Date
BE570620A BE570620A (enrdf_load_stackoverflow) 1958-07-31 1958-08-25

Country Status (3)

Country Link
BE (1) BE570620A (enrdf_load_stackoverflow)
FR (1) FR1210085A (enrdf_load_stackoverflow)
GB (1) GB848534A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
FR1210085A (fr) 1960-03-07
GB848534A (en) 1960-09-21

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