FR945799A - Method and device for extraction without support in the exploitation by metal shoring - Google Patents

Method and device for extraction without support in the exploitation by metal shoring

Info

Publication number
FR945799A
FR945799A FR945799DA FR945799A FR 945799 A FR945799 A FR 945799A FR 945799D A FR945799D A FR 945799DA FR 945799 A FR945799 A FR 945799A
Authority
FR
France
Prior art keywords
exploitation
extraction
support
shoring
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
Otto Schloms
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 FR945799A publication Critical patent/FR945799A/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)
FR945799D 1947-04-16 1947-04-16 Method and device for extraction without support in the exploitation by metal shoring Expired FR945799A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR945799T 1947-04-16

Publications (1)

Publication Number Publication Date
FR945799A true FR945799A (en) 1949-05-13

Family

ID=9472534

Family Applications (1)

Application Number Title Priority Date Filing Date
FR945799D Expired FR945799A (en) 1947-04-16 1947-04-16 Method and device for extraction without support in the exploitation by metal shoring

Country Status (1)

Country Link
FR (1) FR945799A (en)

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