FR906228A - Iron retaining cap for mining galleries - Google Patents

Iron retaining cap for mining galleries

Info

Publication number
FR906228A
FR906228A FR906228DA FR906228A FR 906228 A FR906228 A FR 906228A FR 906228D A FR906228D A FR 906228DA FR 906228 A FR906228 A FR 906228A
Authority
FR
France
Prior art keywords
retaining cap
iron retaining
mining galleries
galleries
mining
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)
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.)
Gutehoffnungshutte Oberhausen AG
Original Assignee
Gutehoffnungshutte Oberhausen AG
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 by Gutehoffnungshutte Oberhausen AG filed Critical Gutehoffnungshutte Oberhausen AG
Application granted granted Critical
Publication of FR906228A publication Critical patent/FR906228A/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)
  • Bridges Or Land Bridges (AREA)
FR906228D 1943-06-05 1944-08-02 Iron retaining cap for mining galleries Expired FR906228A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE906228X 1943-06-05

Publications (1)

Publication Number Publication Date
FR906228A true FR906228A (en) 1945-12-27

Family

ID=6862625

Family Applications (1)

Application Number Title Priority Date Filing Date
FR906228D Expired FR906228A (en) 1943-06-05 1944-08-02 Iron retaining cap for mining galleries

Country Status (2)

Country Link
BE (1) BE457002A (en)
FR (1) FR906228A (en)

Also Published As

Publication number Publication date
BE457002A (en)

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