FR853786A - Effondreur de mines - Google Patents

Effondreur de mines

Info

Publication number
FR853786A
FR853786A FR853786DA FR853786A FR 853786 A FR853786 A FR 853786A FR 853786D A FR853786D A FR 853786DA FR 853786 A FR853786 A FR 853786A
Authority
FR
France
Prior art keywords
mine
collector
mine collector
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
Paul Perrin
Paul Loir
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 FR853786A publication Critical patent/FR853786A/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
    • E21D15/60—Devices for withdrawing props or chocks

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)
FR853786D 1938-11-10 1938-11-10 Effondreur de mines Expired FR853786A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR853786T 1938-11-10

Publications (1)

Publication Number Publication Date
FR853786A true FR853786A (fr) 1940-03-28

Family

ID=9327228

Family Applications (1)

Application Number Title Priority Date Filing Date
FR853786D Expired FR853786A (fr) 1938-11-10 1938-11-10 Effondreur de mines

Country Status (1)

Country Link
FR (1) FR853786A (fr)

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