FR989994A - Support for hatch mines in light metal - Google Patents

Support for hatch mines in light metal

Info

Publication number
FR989994A
FR989994A FR989994DA FR989994A FR 989994 A FR989994 A FR 989994A FR 989994D A FR989994D A FR 989994DA FR 989994 A FR989994 A FR 989994A
Authority
FR
France
Prior art keywords
mines
hatch
support
light metal
metal
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
Other languages
French (fr)
Inventor
Josef Brand
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
Application granted granted Critical
Publication of FR989994A publication Critical patent/FR989994A/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)
  • Connection Of Plates (AREA)
FR989994D 1949-06-21 1949-07-01 Support for hatch mines in light metal Expired FR989994A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1642549A GB679479A (en) 1949-06-21 1949-06-21 Roof support for use in mines

Publications (1)

Publication Number Publication Date
FR989994A true FR989994A (en) 1951-09-25

Family

ID=10077092

Family Applications (1)

Application Number Title Priority Date Filing Date
FR989994D Expired FR989994A (en) 1949-06-21 1949-07-01 Support for hatch mines in light metal

Country Status (3)

Country Link
BE (1) BE491885A (en)
FR (1) FR989994A (en)
GB (1) GB679479A (en)

Also Published As

Publication number Publication date
GB679479A (en) 1952-09-17
BE491885A (en) 1949-11-14

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