FR973461A - Etançon métallique pour mines et exploitations analogues - Google Patents

Etançon métallique pour mines et exploitations analogues

Info

Publication number
FR973461A
FR973461A FR973461DA FR973461A FR 973461 A FR973461 A FR 973461A FR 973461D A FR973461D A FR 973461DA FR 973461 A FR973461 A FR 973461A
Authority
FR
France
Prior art keywords
mines
similar operations
metal prop
prop
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
English (en)
Inventor
Gilles Smal
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 FR973461A publication Critical patent/FR973461A/fr
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14—Telescopic props
    • E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
    • E21D15/285—Telescopic props with parts held relatively to each other by friction or gripping by means of wedges or wedge combinations

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
FR973461D 1947-10-29 1948-10-13 Etançon métallique pour mines et exploitations analogues Expired FR973461A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE973461X 1947-10-29

Publications (1)

Publication Number Publication Date
FR973461A true FR973461A (fr) 1951-02-12

Family

ID=3890968

Family Applications (1)

Application Number Title Priority Date Filing Date
FR973461D Expired FR973461A (fr) 1947-10-29 1948-10-13 Etançon métallique pour mines et exploitations analogues

Country Status (1)

Country Link
FR (1) FR973461A (fr)

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