FR1212988A - New mine prop - Google Patents

New mine prop

Info

Publication number
FR1212988A
FR1212988A FR1212988DA FR1212988A FR 1212988 A FR1212988 A FR 1212988A FR 1212988D A FR1212988D A FR 1212988DA FR 1212988 A FR1212988 A FR 1212988A
Authority
FR
France
Prior art keywords
new mine
mine prop
prop
new
mine
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
Jacques Perrin
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 FR1212988A publication Critical patent/FR1212988A/en
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
    • E21D15/15—Means counteracting entry of dirt; Built-in cleaning devices
    • 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
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props

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)
FR1212988D 1958-10-21 1958-10-21 New mine prop Expired FR1212988A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1212988T 1958-10-21

Publications (1)

Publication Number Publication Date
FR1212988A true FR1212988A (en) 1960-03-28

Family

ID=9676337

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1212988D Expired FR1212988A (en) 1958-10-21 1958-10-21 New mine prop

Country Status (1)

Country Link
FR (1) FR1212988A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1223792B (en) * 1966-01-03 1966-09-01 Salzgitter Maschinen Ag Hydraulic pit ram with return spring

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1223792B (en) * 1966-01-03 1966-09-01 Salzgitter Maschinen Ag Hydraulic pit ram with return spring

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